Water Properties 2016 Mid-term Prep 2
Water Properties 2016 Mid-Term Prep 2
- 1.
What is adhesion?
- A.
Waters ability to stick to other materials
- B.
Waters ability to stick to itself
- C.
Covalent bonds in water
- D.
Capillary Action
Correct Answer
A. Waters ability to stick to other materialsExplanation
Adhesion refers to the ability of water to stick to other materials. This means that water molecules can form attractive forces with the molecules of other substances, allowing them to adhere or cling together. This property is essential for various biological processes, such as the movement of water through plants and the ability of water to wet surfaces. Adhesion is different from cohesion, which refers to the ability of water molecules to stick to each other.Rate this question:
-
- 2.
Identify the property of water that allows a water strider insect to walk on the water.
- A.
Surface Tension
- B.
Polarity
- C.
Capillary Action
- D.
Specific Heat
Correct Answer
A. Surface TensionExplanation
Water has a property called surface tension, which is the force that allows it to resist external forces and form a "skin" on its surface. This property is what allows water strider insects to walk on water. The surface tension of water creates a thin layer on the surface that can support the weight of the insect. As the insect distributes its weight across multiple legs, it can effectively "float" on the surface of the water without sinking.Rate this question:
-
- 3.
Ionic Bonding satisfies both atoms because.....
- A.
Ionic bonding is the trading or transfer of electrons from one atom to another that enables the atoms to have complete outer shells.
- B.
Ionic bonding removes weak electrons from one atom enabling another atom to have strong electronegativity in its outer shell.
- C.
Ionic bonding enables one atom to release an electron and vacate its outer shell.
- D.
Ionic bonding is the sharing of electrons of atoms that enable the atoms to have complete outer shells.
Correct Answer
A. Ionic bonding is the trading or transfer of electrons from one atom to another that enables the atoms to have complete outer shells.Explanation
Ionic bonding is the process of transferring electrons from one atom to another, resulting in both atoms having complete outer shells. This satisfies both atoms because having a complete outer shell is energetically favorable and stable. By transferring electrons, one atom gains a positive charge (cation) while the other gains a negative charge (anion), creating an electrostatic attraction between the two oppositely charged ions. This attraction holds the ions together in a solid lattice, forming an ionic compound.Rate this question:
-
- 4.
What do these symbols​ mean? or
- A.
These symbols​ mean that the atom has either a slight (partial) positive or negative charge.
- B.
These symbols​ mean that the molecule has either a slight (partial) positive or negative charge.
- C.
These symbols​ mean that the atom has a positive or negative electronegativity.
- D.
These symbols​ mean that the atom is polar.
Correct Answer
A. These symbols​ mean that the atom has either a slight (partial) positive or negative charge.Explanation
The symbols " or " are commonly used in chemistry to represent a partial charge on an atom. It indicates that the atom has either a slight positive or negative charge. This notation is often used in molecular structures to show the distribution of electron density within a molecule. The positive or negative charge can result from differences in electronegativity between atoms, causing an unequal sharing of electrons in a covalent bond. Therefore, the correct answer is that these symbols mean that the atom has either a slight (partial) positive or negative charge.Rate this question:
-
- 5.
The water and air pressure lab:If the lab were done while climbing Mt. Everest, as altitude increases what happens?
- A.
As altitude increases, air becomes less dense and the air pressure decreases. The water would not shoot out of the container.
- B.
As altitude increases, air becomes more dense and the air pressure decreases. The water would not shoot out of the container.
- C.
As altitude increases, air becomes more dense and the air pressure increases. The water would shoot out of the container farther than in the classroom.
- D.
As altitude increases, air becomes less dense and the air pressure increases. The water would shoot out of the container farther than in the classroom.
Correct Answer
A. As altitude increases, air becomes less dense and the air pressure decreases. The water would not shoot out of the container.Explanation
As altitude increases, the air becomes less dense because there is less atmospheric pressure. This means that there are fewer air molecules in a given volume of space. As a result, the air pressure decreases. In the context of the water and air pressure lab, this decrease in air pressure would prevent the water from shooting out of the container. This is because the pressure inside the container would be greater than the surrounding air pressure, causing the water to stay inside rather than being forced out.Rate this question:
-
- 6.
Think about Mt. Everest. Complete this statement: As altitude increases, air becomes.......
- A.
less dense, decreasing atmospheric pressure.
- B.
More dense, increasing atmospheric pressure.
- C.
less dense, increasing atmospheric pressure.
- D.
More dense, decreasing atmospheric pressure.
Correct Answer
A. less dense, decreasing atmospheric pressure.Explanation
As altitude increases, the air becomes less dense. This means that there are fewer air molecules in a given volume of space, resulting in a decrease in atmospheric pressure. At higher altitudes, the air pressure is lower because there is less air above pushing down. This is why climbers experience difficulty breathing at high altitudes, as there is less oxygen available due to the decreased density of the air.Rate this question:
-
- 7.
What did Ben Franklin's experiment with a non polar oil substance accurately measure?
- A.
Ben Franklin accurately measured the thickness of a single-molecule thick layer of olive oil on water.
- B.
Ben Franklin accurately measured the pollution in the pond water caused by the olive oil.
- C.
Ben Franklin accurately measured the change in surface tension when olive oil was added to the pond.
- D.
Ben Franklin accurately measured the area of underwater visibility created by altered surface tension when oil was added to water.
Correct Answer
A. Ben Franklin accurately measured the thickness of a single-molecule thick layer of olive oil on water.Explanation
Ben Franklin's experiment accurately measured the thickness of a single-molecule thick layer of olive oil on water. This means that he was able to determine the exact thickness of the layer of oil when it spread over the water surface. This measurement was significant as it provided insights into the behavior of oil on water and contributed to the understanding of surface tension.Rate this question:
-
- 8.
Which property of water is capillary action related to?
- A.
Adhesion
- B.
Cohesion
- C.
Surface Tension
- D.
Polarity
Correct Answer
A. AdhesionExplanation
Capillary action is the ability of a liquid to flow against gravity in a narrow space, such as a thin tube or a porous material. This phenomenon is related to the property of water known as adhesion. Adhesion refers to the attraction between the molecules of water and the molecules of a different substance, such as the walls of a narrow tube or the fibers of a porous material. This attraction allows water to "climb" or rise in these narrow spaces, defying gravity.Rate this question:
-
- 9.
Celery test: What property of water does the celery test model?
- A.
Capillary Action
- B.
Polarity
- C.
Surface Tension
- D.
Specific Heat
Correct Answer
A. Capillary ActionExplanation
The celery test models capillary action. Capillary action is the ability of a liquid to flow against gravity in a narrow space, such as a small tube or the vessels in a plant. In the celery test, water is drawn up through the capillaries in the celery stalk, demonstrating the process of capillary action.Rate this question:
-
- 10.
Choose the correct term to fill in the blank.The Earth's __________ pulls on air, and this pull, or "pressure" of air, is called atmospheric pressure.
- A.
Gravity
- B.
Density
- C.
Volume
- D.
Air Pressure
Correct Answer
A. GravityExplanation
Gravity is the force that pulls objects towards the center of the Earth. In the context of the question, gravity pulls on the air molecules, creating a pressure known as atmospheric pressure. This pressure is a result of the gravitational force exerted by the Earth on the air.Rate this question:
-
- 11.
In the water pressure lab:What do you predict would happen to the water coming out of the container if the container holes were larger?
- A.
If the holes were larger, the volume of water flowing is greater, but slower with less pressure.
- B.
If the holes were larger, the volume of water flowing is less, but faster with more pressure.
- C.
If the holes were larger, the volume of water flowing is greater, faster and with more pressure.
- D.
If the holes were larger, the volume of water flowing is greater, faster and with less pressure.
Correct Answer
A. If the holes were larger, the volume of water flowing is greater, but slower with less pressure.Explanation
If the holes in the container were larger, it would allow more water to flow out. However, because the holes are larger, the water would flow at a slower rate. This is because the larger holes would result in a decrease in pressure, causing the water to flow with less force. Therefore, the volume of water flowing would be greater, but the speed of the flow would be slower, and the pressure would be lower.Rate this question:
-
- 12.
In the water pressure labs:What would you predict about the water coming out of the container if the container holes were made smaller?
- A.
Water comes out of the container faster, is under greater pressure and there is less volume of water in the flow.
- B.
Water comes out of the container faster, is under less pressure and there is greater volume of water in the flow.
- C.
Water comes out of the container slower, is under greater pressure and there is less volume of water in the flow.
- D.
Water comes out of the container slower, is under less pressure and there is less volume of water in the flow.
Correct Answer
A. Water comes out of the container faster, is under greater pressure and there is less volume of water in the flow.Explanation
If the holes in the container are made smaller, it would result in an increased pressure inside the container. This increased pressure would cause the water to come out of the container faster. Additionally, the smaller holes would restrict the flow, resulting in less volume of water in the flow. Therefore, the correct answer is that the water comes out of the container faster, is under greater pressure, and there is less volume of water in the flow.Rate this question:
-
- 13.
What does the 'Follow the String' activity demonstrate?
- A.
Cohesion and adhesion.
- B.
Surface tension and adhesion.
- C.
Cohesion and capillary action.
- D.
Adhesion and capillary action.
Correct Answer
A. Cohesion and adhesion.Explanation
The "Follow the String" activity demonstrates cohesion and adhesion. Cohesion refers to the attraction between molecules of the same substance, causing them to stick together. Adhesion, on the other hand, refers to the attraction between molecules of different substances. In this activity, the string is able to stick to the surface due to adhesion, and the water molecules are able to stick to each other and move along the string due to cohesion.Rate this question:
-
- 14.
Water Pressure Lab: Observe these containers:Identify: when is the bottle of water under the greatest pressure?
- A.
Bottle with the cap off
- B.
Bottle with the cap-on
- C.
Cap-on, bottle with the narrowest opening
- D.
Cap-on, bottle with the widest opening
Correct Answer
A. Bottle with the cap offExplanation
The bottle of water is under the greatest pressure when the cap is off because there is no barrier to prevent the water from flowing out freely. When the cap is on, the pressure inside the bottle is reduced because the cap restricts the flow of water. Therefore, the bottle with the cap off has the highest pressure compared to the other options.Rate this question:
-
- 15.
In the water pressure lab, of the two containers and three holes:Which container and which container hole had the least amount of water coming out when the hole was un-taped?
- A.
Capped, top hole
- B.
Uncapped, top hole
- C.
Uncapped, middle hole
- D.
Capped, middle hole
Correct Answer
A. Capped, top holeExplanation
The explanation for the correct answer is that when the hole is un-taped, the capped top hole will have the least amount of water coming out. This is because the cap prevents water from flowing out freely, reducing the water pressure and resulting in a lower amount of water coming out compared to the other holes.Rate this question:
-
- 16.
Identify the property of water represented in this diagram:
- A.
Capillary Action
- B.
Polarity
- C.
Universal solvency
- D.
Surface tension
Correct Answer
A. Capillary ActionExplanation
Capillary action is the property of water represented in the diagram. Capillary action refers to the ability of water to move against gravity in narrow spaces, such as small tubes or gaps in porous materials. This is due to the cohesive forces between water molecules and the adhesive forces between water and the surface it comes into contact with. As a result, water is able to "climb" up the narrow spaces, as shown in the diagram.Rate this question:
-
- 17.
This image shows two soda bottle streamsLook at this image to answer the question below.Soda bottle stream lab:The soda bottle has vertical cuts for the water to pour out.As the water exits the bottle it forms two individual streams. Identify the property of water that, with each pinch of your fingers, causes the water to combine and flow as one stream of water.
- A.
Cohesion causes the streams of water to combine with each pinch of your fingers to combine and flow as one stream of water.
- B.
Adhesion causes the streams of water to combine with each pinch of your fingers to combine and flow as one stream of water.
- C.
Polarity causes the streams of water to combine with each pinch of your fingers to combine and flow as one stream of water.
- D.
Surface tension causes the streams of water to combine with each pinch of your fingers to combine and flow as one stream of water.
Correct Answer
A. Cohesion causes the streams of water to combine with each pinch of your fingers to combine and flow as one stream of water.Explanation
Cohesion is the property of water that causes the streams of water to combine with each pinch of your fingers and flow as one stream. Cohesion refers to the attraction between water molecules, which allows them to stick together. In this case, when the water exits the bottle and forms two individual streams, the cohesive forces between the water molecules cause them to combine and flow as one stream when your fingers pinch them together.Rate this question:
-
- 18.
What is wicking?
- A.
A material that pulls moisture through by capillary action
- B.
Adhesion of water
- C.
Cohesion of water
- D.
Capillary Action of water
Correct Answer
A. A material that pulls moisture through by capillary actionExplanation
Wicking refers to the ability of a material to draw moisture or liquid through it by capillary action. Capillary action is the process by which liquid is pulled upward against gravity in narrow spaces, such as small tubes or fibers, due to the cohesive and adhesive forces between the liquid and the material. Therefore, a material that can pull moisture through by capillary action is considered to have wicking properties.Rate this question:
-
- 19.
Identify the property of water that explains why water forms drops.
- A.
Cohesion causes surface tension
- B.
Polarity
- C.
Capillary action
- D.
Specific heat
Correct Answer
A. Cohesion causes surface tensionExplanation
Cohesion is the property of water molecules attracting each other. This attraction creates surface tension, which is the force that allows water to form drops. Surface tension is the result of the cohesive forces between water molecules at the surface of the drop, causing them to stick together and form a spherical shape. Therefore, cohesion causing surface tension is the property of water that explains why water forms drops.Rate this question:
-
- 20.
A meniscus formed in a graduated cylinder is caused by and an example of what characteristic of water?
- A.
Adhesion
- B.
Cohesion
- C.
Surface Tension
- D.
Capillary Action
Correct Answer
A. AdhesionExplanation
The meniscus formed in a graduated cylinder is caused by adhesion, which is the attraction between the water molecules and the glass surface of the cylinder. Adhesion allows the water molecules to cling to the sides of the cylinder, causing the curved shape of the meniscus. Cohesion, on the other hand, refers to the attraction between water molecules themselves. Surface tension is the result of cohesive forces, creating a "skin" on the surface of the water. Capillary action is the ability of water to move against gravity in narrow spaces, also due to cohesive and adhesive forces.Rate this question:
-
- 21.
Identify which property of water allows water to move against gravity.
- A.
Capillary Action allows water to move against gravity.
- B.
Surface tension allows water to move against gravity.
- C.
Cohesion allows water to move against gravity.
- D.
Universal solvency allows water to move against gravity.
Correct Answer
A. Capillary Action allows water to move against gravity.Explanation
Capillary action is the process by which water is able to move against gravity in narrow spaces, such as small tubes or gaps in soil. This is due to the cohesive forces between water molecules and the adhesive forces between water and the surfaces of the narrow spaces. These forces allow water to "climb" up the narrow spaces, defying the force of gravity. Surface tension, cohesion, and universal solvency are properties of water, but they do not specifically enable water to move against gravity.Rate this question:
-
- 22.
Look at the diagram of capillary action in the tubes. Why does the water rise at different levels in each tube?
- A.
Capillary action causes the water to rise at different levels in the tubes because the rise depends on the diameter of the tube. The smaller the tube diameter the greater the rise of the water column in the tube.
- B.
Capillary action causes the water to rise at different levels in the tubes because the rise depends on the surface tension within the tube.
- C.
Capillary action causes the water to rise at different levels in the tubes because the rise depends on the pull of gravity on the tube.
- D.
Capillary action causes the water to rise at different levels in the tubes because the rise depends on the cohesion of adhered water to and among other water molecules to the surface.
Correct Answer
A. Capillary action causes the water to rise at different levels in the tubes because the rise depends on the diameter of the tube. The smaller the tube diameter the greater the rise of the water column in the tube.Explanation
Capillary action is the ability of a liquid to flow in narrow spaces against the force of gravity. It occurs due to the cohesive forces between the liquid molecules and the adhesive forces between the liquid and the surface of the tube. In the case of capillary action, the rise of water in the tube depends on the diameter of the tube. The smaller the diameter, the greater the rise of the water column because the cohesive forces between the water molecules are stronger in a narrower space, allowing the water to climb higher against gravity.Rate this question:
-
- 23.
What caused the water to climb higher on the paper towel than the oil?
- A.
The water climbs higher than the oil on the paper towel because oil is non-polar and its molecules don't easily cohere. Water has polar molecules that cohere to one another and adhere to surface of the paper towel allowing it to climb and pull other water molecules along.
- B.
The water climbs higher than the oil on the paper towel because oil is polar and does not attract to the paper towel which is non-polar. Water's non-polar molecules adhere to the paper towel.
- C.
The water climbs higher than the oil on the paper towel because oil is non-polar, its molecules cohere tightly to each other and and do not want to adhere to the polar paper towel.
- D.
The water climbs higher than the oil on the paper towel because the oil is hydrophilic and repels the paper towel.
Correct Answer
A. The water climbs higher than the oil on the paper towel because oil is non-polar and its molecules don't easily cohere. Water has polar molecules that cohere to one another and adhere to surface of the paper towel allowing it to climb and pull other water molecules along.Explanation
The water climbs higher than the oil on the paper towel because oil is non-polar and its molecules don't easily cohere. Water has polar molecules that cohere to one another and adhere to the surface of the paper towel, allowing it to climb and pull other water molecules along.Rate this question:
-
- 24.
This image shows two soda bottle streamsLook at this image to answer the question below.Soda bottle stream lab:The soda bottle has vertical cuts for the water to pour out.As the water exits the bottle it forms two individual streams. Identify the property of water that, with each swipe of your fingers, causes the water to separate and flow as two separate streams of water.
- A.
Cohesion causes the streams of water to separate with each swipe of the finger flowing as two separate streams of water.
- B.
Adhesion causes the streams of water to separate with each swipe of the finger flowing as two separate streams of water.
- C.
Polarity causes the streams of water to separate with each swipe of the fingers.
- D.
Surface tension causes the streams of water to combine with each pinch of your fingers to combine and flow as two separate streams of water.
Correct Answer
B. Adhesion causes the streams of water to separate with each swipe of the finger flowing as two separate streams of water.Explanation
Adhesion is the property of water that causes the streams of water to separate with each swipe of the finger, flowing as two separate streams. Adhesion refers to the attraction between water molecules and other substances, such as the material of the soda bottle or the finger. In this case, the water molecules adhere to the vertical cuts in the bottle, causing them to flow in separate streams.Rate this question:
-
- 25.
Wicking Paper Towel Rope:How does water flow from cup A to cup B?
- A.
Water flows from cup A to cup B by capillary action.
- B.
Water flows from cup A to cup B by surface tension.
- C.
Water flows from cup A to cup B by polarity.
- D.
Water flows from cup A to cup B by gravity.
Correct Answer
A. Water flows from cup A to cup B by capillary action.Explanation
Water flows from cup A to cup B by capillary action. Capillary action is the ability of a liquid to flow in narrow spaces against the force of gravity. In this case, the wicking paper towel acts as a capillary, drawing the water from cup A to cup B through small channels within its structure. This process occurs due to adhesive and cohesive forces between the water molecules and the paper towel fibers, allowing the water to climb up against gravity and move from cup A to cup B.Rate this question:
-
- 26.
Wicking Paper Towel Rope How does cohesion and adhesion cause the paper towel to wick the water from cup A to cup B?
- A.
The paper towel rope acts as a wick causing the cohesive water molecules to follow each other through the tiny gaps in the fabric of the paper towel. The adhesive force between the paper towel rope and the water is stronger than the cohesive forces of the water molecules helping the water to move up the paper towel rope.
- B.
The paper towel rope acts as a wick causing the adhesive water molecules to follow each other through the tiny gaps in the fabric of the paper towel. The cohesive force between the paper towel rope and the water is stronger than the adhesive forces of the water molecules helping the water to move up the paper towel rope.
- C.
The paper towel rope wick is twisted into a spiral which causes the water to adhere to itself and pull itself up from cup A to cup B.
- D.
The paper towel rope wick breaks the surface tension of the water causing it to adhere to it and climb against gravity.
Correct Answer
A. The paper towel rope acts as a wick causing the cohesive water molecules to follow each other through the tiny gaps in the fabric of the paper towel. The adhesive force between the paper towel rope and the water is stronger than the cohesive forces of the water molecules helping the water to move up the paper towel rope.Explanation
The explanation states that the paper towel rope acts as a wick, allowing the cohesive water molecules to move through the tiny gaps in the fabric of the paper towel. The adhesive force between the paper towel rope and the water is stronger than the cohesive forces of the water molecules, enabling the water to be pulled up the paper towel rope. This explanation highlights the role of cohesion and adhesion in causing the paper towel to wick the water from cup A to cup B.Rate this question:
-
- 27.
Wicking Paper Towel Rope Lab groups chose different food colorings for their water. Some groups noticed that the food coloring in cup A did not transfer to cup B.Their cup B had a different color. What caused the food coloring change from cup A to cup B?
- A.
Some food coloring color pigments (purple for example) separated from the water and brokedown to its basic components while being wicked by the paper towel. Those colors (like purple) did not transfer but their base colors did transfer.
- B.
Some food coloring color pigments (purple for example) absorbed the color from the paper towel rope. This added to its basic color components and transferred a different color.
- C.
Some food coloring color pigments (purple for example) reflected the color of the paper towel rope. This caused the color that was transferred to be brighter.
- D.
Some food coloring color pigments (purple for example) were left behind completely causing the water in cup A to be purple and the water in cup B to be clear.
Correct Answer
A. Some food coloring color pigments (purple for example) separated from the water and brokedown to its basic components while being wicked by the paper towel. Those colors (like purple) did not transfer but their base colors did transfer.Explanation
The food coloring pigments in cup A separated from the water and broke down into their basic components while being absorbed by the paper towel. These pigments, such as purple, did not transfer to cup B, but their base colors did transfer. This explains why cup B had a different color than cup A.Rate this question:
-
- 28.
Magic Milk: What causes the food coloring to burst away from the drop of soap?
- A.
Milk is mostly water, but it also contains tiny droplets of fat (lipid) suspended in the milk. Fats and proteins are sensitive to changes in the surrounding solution (the milk). Like other oils, milk fat is a non-polar molecule. It doesn’t dissolve in water. The tiny drop of soap is enough to break up and collect the fat molecules in the milk. Soap micelles surround the milk fat. As the soap molecules race around, bending and twisting to join up with the molecules of milk fat, it sends a ripple through the milk in all directions. The food coloring molecules are bumped and shoved everywhere. As the soap joins up with as many molecules as it can the action slows down and eventually stops. This is why milk with a higher fat content produces a better explosion of color—there’s just more fat to combine with all of those soap molecules.
- B.
Milk is mostly water, but it also contains tiny droplets of fat (lipid) suspended in the milk. Fats are sensitive to changes in the milk. Milk fat is a non-polar molecule. It doesn’t dissolve in water. The tiny drop of soap is enough to break the surface tension of the fat. The soap micelles surround the milk fat and form big color beads that roll around and bump the food coloring in all directions. The food coloring molecules are bumped and shoved everywhere.
- C.
Milk is all fat with a little water. Milk is sensitive to changes in the water. The tiny drop of soap is enough to turn the fat into a polar molecule and attract the water and food coloring. This causes the ripple of color in the milk.
- D.
Water is non-polar. Milk has fat and is non-polar and polar. When soap is introduced, the surface tension of the milk is broken and the milk fats chase the food coloring molecules to attach to them. This causes the ripple of color in the milk.
Correct Answer
A. Milk is mostly water, but it also contains tiny droplets of fat (lipid) suspended in the milk. Fats and proteins are sensitive to changes in the surrounding solution (the milk). Like other oils, milk fat is a non-polar molecule. It doesn’t dissolve in water. The tiny drop of soap is enough to break up and collect the fat molecules in the milk. Soap micelles surround the milk fat. As the soap molecules race around, bending and twisting to join up with the molecules of milk fat, it sends a ripple through the milk in all directions. The food coloring molecules are bumped and shoved everywhere. As the soap joins up with as many molecules as it can the action slows down and eventually stops. This is why milk with a higher fat content produces a better explosion of color—there’s just more fat to combine with all of those soap molecules.Explanation
The correct answer explains that milk contains tiny droplets of fat suspended in the water. These fat molecules are non-polar and do not dissolve in water. When a drop of soap is added to the milk, it collects and breaks up the fat molecules. Soap molecules surround the fat, causing a ripple effect through the milk. This movement bumps and shoves the food coloring molecules, creating a burst of color. The more fat content in the milk, the more fat molecules there are to combine with the soap, resulting in a better explosion of color.Rate this question:
-
- 29.
Celery ClimbThis image shows a piece of the celery stalk. What do these red dots indicate?
- A.
The red dots indicate where the celery stalk soaked up the food colored water.
- B.
The red dots indicate where the celery stalk is deteriorating.
- C.
The red dots indicate where the celery stalk is diseased.
- D.
The red dots indicate where the celery stalk is releasing its fluids.
Correct Answer
A. The red dots indicate where the celery stalk soaked up the food colored water.Explanation
The red dots indicate where the celery stalk soaked up the food colored water.Rate this question:
-
- 30.
Celery ClimbWhat does this photo show?
- A.
This photo shows one of the red dyed celery stalk capillary tubes.
- B.
This photo shows that celery has red blood cells.
- C.
This photo shows that celery is made of red fibers.
- D.
This photo shows celery has a healthy stalk.
Correct Answer
A. This photo shows one of the red dyed celery stalk capillary tubes.Explanation
This photo shows one of the red dyed celery stalk capillary tubes. The image likely depicts a close-up view of a celery stalk that has been dyed red. The capillary tubes in the celery stalk are responsible for transporting water and nutrients throughout the plant. By dyeing the celery stalk, the capillary tubes become more visible, allowing for a better understanding of how water and nutrients are transported within the plant.Rate this question:
-
- 31.
Dome-de-Dome What did the Dome-de-Dome activity demonstrate?
- A.
Dome-de-dome demonstrated that on a sheet of wax paper a bead of water is very cohesive and sticks together tightly due to its polarity and that a bead of oil that is non-polar is less cohesive and spreads out further and is flatter on the wax paper.
- B.
Dome-de-dome demonstrated that on a sheet of wax paper a bead of water is very adhesive and sticks to the wax paper because of its polarity and that a bead of oil that is non-polar does not stick to the wax paper.
- C.
Dome-de-dome demonstrated that on a sheet of wax paper a bead of water spreads out further and is flatter on the wax paper than the oil because it is polar.
- D.
Dome-de-dome demonstrated that on a sheet of wax paper a bead of oil is polar and sticks to the wax paper spreading flatter across the wax paper.
Correct Answer
A. Dome-de-dome demonstrated that on a sheet of wax paper a bead of water is very cohesive and sticks together tightly due to its polarity and that a bead of oil that is non-polar is less cohesive and spreads out further and is flatter on the wax paper.Explanation
The Dome-de-Dome activity demonstrated that on a sheet of wax paper, a bead of water is very cohesive and sticks together tightly due to its polarity. In contrast, a bead of oil that is non-polar is less cohesive and spreads out further, resulting in a flatter shape on the wax paper.Rate this question:
-
- 32.
Beads of Water and Oil:What do these images show about how water and oil behave on wax paper?
- A.
These images show that on a hydrophobic surface such as wax paper, water will bead up very tightly and be able to roll around. This is because the water is not attracted to the wax paper and does not want to interact with it. It shows that on a hydrophilic surface water will lay flatter because it is attracted to the surface.
- B.
These images show that on a hydrophilic surface such as wax paper, water will bead up very tightly and be able to roll around. This is because the water is attracted to the wax paper and does wants to interact with it. It shows that on a hydrophobic surface water will lay flatter because it is not attracted to the surface.
- C.
These images show that oil will lay flatter on a hydrophilic surface and bead up on a hydrophobic surface.
- D.
These images show that oil is hydrophobic and will be attracted to wax paper.
Correct Answer
A. These images show that on a hydrophobic surface such as wax paper, water will bead up very tightly and be able to roll around. This is because the water is not attracted to the wax paper and does not want to interact with it. It shows that on a hydrophilic surface water will lay flatter because it is attracted to the surface.Explanation
The explanation provided in the answer is correct. The images show that on a hydrophobic surface like wax paper, water forms tight beads and can roll around because it is not attracted to the surface and does not want to interact with it. On the other hand, on a hydrophilic surface, water lays flatter because it is attracted to the surface. This behavior is due to the difference in the interaction between water and the surface, which is determined by the surface's hydrophobic or hydrophilic nature.Rate this question:
-
- 33.
You Can't Fix What Won't Mix:What causes the food coloring to behave as it does when it is dropped into the graduated cylinder of oil and water?
- A.
Since oil is less dense than water, the oil sits on top of the water. When it's dropped into the cylinder and hits the oil first, the food coloring forms a tight bead because it does not want to mix with the oil. Because the food coloring is water based, it is more dense than the oil and slowly sinks through it. When it reaches the intersection of the oil and water it sinks through and then the bead of food coloring bursts apart dissolving in the water.
- B.
Since oil is more dense than water, the water sits on top of the oil. When it's dropped into the cylinder and hits the water first, the food coloring forms a tight bead because it does not want to mix with it. Because the food coloring is oil based, it is more dense than the water and slowly sinks through it. When it reaches the intersection of the oil and water it sinks through and then bursts apart.
- C.
The food coloring is oil based and floats through the water to reach the oil.
- D.
The food coloring is more dense than the oil and the water and floats through the oil to reach the water. When the food coloring reaches the water it absorbs it.
Correct Answer
A. Since oil is less dense than water, the oil sits on top of the water. When it's dropped into the cylinder and hits the oil first, the food coloring forms a tight bead because it does not want to mix with the oil. Because the food coloring is water based, it is more dense than the oil and slowly sinks through it. When it reaches the intersection of the oil and water it sinks through and then the bead of food coloring bursts apart dissolving in the water.Explanation
When food coloring is dropped into the graduated cylinder of oil and water, the oil, being less dense than water, sits on top of the water. When the food coloring hits the oil first, it forms a tight bead because it does not want to mix with the oil. However, because the food coloring is water-based and more dense than the oil, it slowly sinks through the oil. Once it reaches the intersection of the oil and water, it sinks through and the bead of food coloring bursts apart, dissolving in the water.Rate this question:
-
- 34.
Identify the water property represented in this diagram:
- A.
Polarity
- B.
Specific heat
- C.
Universal solvency
- D.
Surface tension
Correct Answer
A. PolarityExplanation
The diagram represents the property of water known as polarity. Polarity refers to the uneven distribution of electrical charge within a molecule. In the case of water, the oxygen atom is slightly negative, while the hydrogen atoms are slightly positive. This polarity allows water molecules to form hydrogen bonds with each other, giving water its unique properties such as high boiling point, surface tension, and the ability to dissolve many substances.Rate this question:
-
.jpg "The water and air pressure lab:If the lab were done while climbing Mt. Everest, as altitude increases what happens?")
.png "In the water pressure labs:What would you predict about the water coming out of the container if the container holes were made smaller?")
.png "Water Pressure Lab: Observe these containers:Identify: when is the bottle of water under the greatest pressure?")
.png "In the water pressure lab, of the two containers and three holes:Which container and which container hole had the least amount of water coming out when the hole was un-taped?")
.png "Wicking Paper Towel Rope How does cohesion and adhesion cause the paper towel to wick the water from cup A to cup B?")
- Air Quizzes
- Atmosphere Quizzes
- Beach Quizzes
- Biome Quizzes
- Conservation Quizzes
- Desert Quizzes
- Diffusion Quizzes
- Disaster Quizzes
- Ecosystem Quizzes
- Evolution Quizzes
- Fire Quizzes
- Flower Quizzes
- Forest Quizzes
- Global Warming Quizzes
- Lake Quizzes
- Landform Quizzes
- Mountain Quizzes
- Natural Resource Quizzes
- Nature Of Matter Quizzes
- Osmosis Quizzes
- Plant Quizzes
- Pollution Quizzes
- Recycling Quizzes
- River Quizzes
- Sea Quizzes
- Season Quizzes
- Snow Quizzes
- Soil Quizzes
- Wildlife Quizzes
- Wind Quizzes
Back to top