Chapter 3 A.P. Biology Water Quiz

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Chapter 3 A.P. Biology Water Quiz - Quiz

Do you know about the AP Biology course? Are you preparing for this exam? Play this AP Biology quiz consisting of chapter 3 water-related questions and answers to review your biology knowledge. Do you know everything about water? What are the properties of water? What is water made of? Take this AP Biology practice test and improve your understanding of water. Also, you will get to know many interesting facts about water. Shall we proceed, then? Good luck!


Questions and Answers
  • 1. 

    What kind of bonds hold water molecules together?

    • A.

      Covalent

    • B.

      Ionic

    • C.

      Hydrogen

    • D.

      Metallic

    Correct Answer
    C. Hydrogen
    Explanation
    Water molecules are held together by hydrogen bonds. These bonds form between the hydrogen atom of one water molecule and the oxygen atom of another water molecule. Hydrogen bonds are weaker than covalent bonds but stronger than other intermolecular forces, such as van der Waals forces. These bonds give water its unique properties, such as high boiling point, surface tension, and the ability to dissolve many substances.

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  • 2. 

    What does cohesion state?

    • A.

      Water sticks to other substances

    • B.

      Water sticks to water

    • C.

      Hydrogen sticks to hydrogen

    • D.

      Hydrogen sticks to other substances

    Correct Answer
    B. Water sticks to water
    Explanation
    Water sticks to water is the correct answer because cohesion refers to the attraction between molecules of the same substance. In the case of water, the oxygen atom in one water molecule is attracted to the hydrogen atoms in neighboring water molecules, creating hydrogen bonds. These hydrogen bonds cause water molecules to stick together, resulting in surface tension and other unique properties of water.

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  • 3. 

    What does adhesion state?

    • A.

      Water sticks to other substances

    • B.

      Water sticks to water

    • C.

      Hydrogen sticks to hydrogen

    • D.

      Hydrogen sticks to other substances

    Correct Answer
    A. Water sticks to other substances
    Explanation
    Adhesion refers to the ability of water molecules to stick to other substances. This property is due to the polarity of water molecules, which allows them to form hydrogen bonds with other molecules or surfaces. As a result, water can adhere to various materials such as glass, paper, or plant tissues. This adhesion is important for many biological processes, such as water transport in plants and the ability of water to wet surfaces.

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  • 4. 

    What is surface tension?

    • A.

      When pressure in water is higher towards the surface

    • B.

      When the air meets the surface of the water and pushes it downward

    • C.

      When the surface of a body of water spontaneously sinks into itself

    • D.

      When water forms a "skin" on its surface

    Correct Answer
    D. When water forms a "skin" on its surface
    Explanation
    Surface tension is a phenomenon that occurs when water molecules at the surface of a body of water are attracted to each other more strongly than to the air molecules above. This attraction causes the water molecules to form a cohesive "skin" on the surface, giving it a higher level of tension compared to the bulk of the water. This "skin" allows certain objects to float on the surface of water and allows insects, like water striders, to walk on water.

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  • 5. 

    What is specific heat?

    • A.

      The temperature it takes to raise 1g of a substance by 1 degree C

    • B.

      The temperature it takes to raise 1g of a substance by 1 degree F

    • C.

      The temperature in Celcius to boil 1g of a substance at boiling point

    • D.

      The temperature in Fahrenheit to boil 1g of a substance at boiling point

    Correct Answer
    A. The temperature it takes to raise 1g of a substance by 1 degree C
    Explanation
    Specific heat refers to the amount of heat energy required to raise the temperature of a substance by a certain amount. In this case, the correct answer states that specific heat is the temperature it takes to raise 1g of a substance by 1 degree Celsius. This means that a specific amount of heat energy is needed to increase the temperature of 1 gram of the substance by 1 degree Celsius.

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  • 6. 

    Describe the specific heat of water.

    • A.

      Low

    • B.

      Moderate

    • C.

      High

    • D.

      It has none

    Correct Answer
    C. High
    Explanation
    Water has a high specific heat because it requires a large amount of energy to raise its temperature. This means that water can absorb and store a significant amount of heat without experiencing a large increase in temperature. As a result, water is able to regulate temperature and maintain stable conditions in various environments, making it an essential component for many biological processes.

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  • 7. 

    What is the specific heat of water?

    • A.

      0.5 Joules

    • B.

      1.0 Joules

    • C.

      1.5 Joules

    • D.

      2.0 Joules

    Correct Answer
    B. 1.0 Joules
    Explanation
    The specific heat of a substance is the amount of heat energy required to raise the temperature of a unit mass of the substance by one degree Celsius. In the case of water, the specific heat is approximately 1.0 Joules. This means that it takes 1.0 Joules of heat energy to raise the temperature of one gram of water by one degree Celsius.

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  • 8. 

    How does the water on Earth regulate the Earth's temperature?

    • A.

      It lets heat pass through it, but only increases a few degrees in temp.

    • B.

      It absorbs heat, but only increases a few degrees in temp.

    • C.

      It lets heat pass through it, decreasing in temp.

    • D.

      It absorbs heat, decreasing in temp.

    Correct Answer
    B. It absorbs heat, but only increases a few degrees in temp.
    Explanation
    Water on Earth regulates the Earth's temperature by absorbing heat. When the sun's rays reach the Earth's surface, water absorbs a significant amount of this heat energy. However, water has a high specific heat capacity, meaning it can absorb a large amount of heat energy without undergoing a significant increase in temperature. This property allows water to act as a buffer, preventing rapid temperature fluctuations in the Earth's climate. As a result, water helps to regulate and stabilize the Earth's temperature, creating a more habitable environment for living organisms.

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  • 9. 

    What is a substance's heat of vaporization?

    • A.

      The temperature it takes to raise 1g of a substance by 1 degree C

    • B.

      The temperature it takes to raise 1g of a substance by 1 degree F

    • C.

      The temperature in Celcius to boil 1g of a substance at boiling point

    • D.

      The temperature in Fahrenheit to boil 1g of a substance at boiling point

    Correct Answer
    C. The temperature in Celcius to boil 1g of a substance at boiling point
    Explanation
    The heat of vaporization is the amount of heat energy required to convert 1 gram of a substance from a liquid to a gas at its boiling point. It is measured in units of energy per unit mass, such as joules per gram (J/g) or calories per gram (cal/g). The answer choice "The temperature in Celsius to boil 1g of a substance at boiling point" correctly describes the heat of vaporization as the temperature required to boil 1 gram of a substance at its boiling point.

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  • 10. 

    Describe water's heat of vaporization.

    • A.

      High

    • B.

      Moderate

    • C.

      Low

    • D.

      It has none

    Correct Answer
    A. High
    Explanation
    Water's heat of vaporization is high because it requires a significant amount of energy to convert water from a liquid state to a gaseous state. This is due to the strong hydrogen bonding between water molecules, which results in a high boiling point and a high heat of vaporization. As a result, water can absorb and store a large amount of heat energy, making it an effective coolant and allowing for efficient heat transfer in various natural and industrial processes.

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  • 11. 

    What is water's heat of vaporization?

    • A.

      80 Joules

    • B.

      90 Joules

    • C.

      2260 Joules

    • D.

      22 Joules

    Correct Answer
    C. 2260 Joules
    Explanation
    Water's heat of vaporization is the amount of heat energy required to convert a given quantity of water from its liquid state to its gaseous state at a constant temperature and pressure. It is a measure of the strength of the intermolecular forces between water molecules. The correct answer, 2260 Joules, indicates that a significant amount of energy is needed to overcome these forces and vaporize water.

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  • 12. 

    What does perspiration state?

    • A.

      Evaporation/boiling is a cooling process

    • B.

      Evaporation/boiling is a heating process

    • C.

      Evaporation/boiling creates moisture

    • D.

      None of these

    Correct Answer
    A. Evaporation/boiling is a cooling process
    Explanation
    Perspiration is the process by which the body releases sweat to cool down. When sweat evaporates from the skin, it takes away heat from the body, resulting in a cooling effect. This is why evaporation/boiling is considered a cooling process in relation to perspiration.

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  • 13. 

    Why does ice float?

    • A.

      When water cools, molecules get further away, form more H bonds, thus pushing molecules apart, making water less dense, which makes ice float

    • B.

      When water cools, molecules get closer, form more H bonds, thus pushing molecules apart, making water less dense, which makes ice float

    • C.

      When water cools, molecules get further away, form more H bonds, thus pushing molecules together, making water less dense, which makes ice float

    • D.

      When water cools, molecules get closer, form more H bonds, thus pushing molecules together, making water less dense, which makes ice float

    Correct Answer
    B. When water cools, molecules get closer, form more H bonds, thus pushing molecules apart, making water less dense, which makes ice float
    Explanation
    As water cools, the molecules slow down and come closer together. This closer proximity allows the water molecules to form more hydrogen bonds with each other. These hydrogen bonds create a lattice-like structure in the water molecules, which causes them to spread out and become less dense. This decrease in density makes ice less dense than liquid water, causing it to float.

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  • 14. 

    How does water act in most solutions?

    • A.

      It is a universal solute, dissolving mostly ionic or polar covalent substances

    • B.

      It is a universal solvent, dissolving mostly ionic or polar covalent substances

    • C.

      It is a universal solute, dissolving mostly non-polar covalent substances

    • D.

      It is a universal solvent, dissolving mostly non-polar covalent substances

    Correct Answer
    B. It is a universal solvent, dissolving mostly ionic or polar covalent substances
    Explanation
    Water is a polar molecule, meaning it has a slight positive charge on one end and a slight negative charge on the other. This polarity allows water molecules to attract and surround ions or polar molecules, causing them to dissolve. Therefore, water acts as a universal solvent for substances that are ionic or polar covalent in nature, dissolving them in most solutions.

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  • 15. 

    Name the 7 properties of water

    • A.

      Cohesion, Adhesion, Surface Tension, Low Specific Heat, Low Heat of Vaporization, Ice Floats, Universal Solvent

    • B.

      Cohesion, Adhesion, Surface Tension, Low Specific Heat, Low Heat of Vaporization, Ice Floats, Universal Solute

    • C.

      Cohesion, Adhesion, Surface Tension, High Specific Heat, High Heat of Vaporization, Ice Floats, Universal Solvent

    • D.

      Cohesion, Adhesion, Surface Tension, High Specific Heat, High Heat of Vaporization, Ice Floats, Universal Solute

    Correct Answer
    C. Cohesion, Adhesion, Surface Tension, High Specific Heat, High Heat of Vaporization, Ice Floats, Universal Solvent
    Explanation
    The answer is Cohesion, Adhesion, Surface Tension, High Specific Heat, High Heat of Vaporization, Ice Floats, Universal Solvent. These properties are all characteristics of water that contribute to its unique behavior and importance in biological systems. Cohesion refers to the attraction between water molecules, which allows for surface tension and the ability of water to stick to itself. Adhesion is the attraction between water molecules and other substances, allowing water to adhere to surfaces. Surface tension is the result of cohesive forces at the surface of water. High specific heat and heat of vaporization are properties that allow water to absorb and release heat without significant temperature changes, making it an effective temperature regulator. Ice floats because it is less dense than liquid water. Water is also known as the universal solvent because it has the ability to dissolve a wide variety of substances.

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  • 16. 

    What is water made of?

    • A.

      Negative H ions and positive OH ions

    • B.

      Positive H ions and negative OH ions

    • C.

      Both of these

    • D.

      Neither of these

    Correct Answer
    B. Positive H ions and negative OH ions
    Explanation
    Water is made up of positive H ions (hydrogen ions) and negative OH ions (hydroxide ions). The positive H ions are formed when water molecules lose an electron, while the negative OH ions are formed when water molecules gain an electron. These ions combine to form water molecules, with the H ions bonding with the oxygen atom in the OH ions. Therefore, both positive H ions and negative OH ions are present in water.

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  • 17. 

    What can supplement for H+ ions?

    • A.

      Hydronium Ions (H3O+)

    • B.

      Hydronium Ions (H4O+)

    • C.

      Hydroxide Ions (OH-)

    • D.

      Hydroxide Ions (HO-)

    Correct Answer
    A. Hydronium Ions (H3O+)
    Explanation
    Hydronium ions (H3O+) can supplement for H+ ions because they are formed when a water molecule (H2O) gains an extra proton (H+). This proton is then attached to the oxygen atom in the water molecule, resulting in the formation of a hydronium ion. Therefore, hydronium ions can act as a source of H+ ions in chemical reactions and can play a similar role in acid-base reactions.

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  • 18. 

    What is one defining freature of acids?

    • A.

      They give off OH- ions

    • B.

      They give off H+ ions

    • C.

      They give off H2O ions

    • D.

      They give off H30+ ions

    Correct Answer
    B. They give off H+ ions
    Explanation
    One defining feature of acids is that they give off H+ ions. This is because acids are substances that can donate protons (H+) to a solution. When an acid is dissolved in water, it releases H+ ions, which contribute to the acidic properties of the solution. The concentration of H+ ions determines the acidity of the solution, with higher concentrations indicating stronger acids.

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  • 19. 

    How can one measure H+ concentration

    • A.

      PH scale

    • B.

      POH scale

    • C.

      Both of these

    • D.

      This is choice D

    Correct Answer
    A. PH scale
    Explanation
    The pH scale is used to measure the concentration of H+ ions in a solution. It quantifies the acidity or alkalinity of a solution, with a pH value less than 7 indicating acidity, a value of 7 indicating neutrality, and a value greater than 7 indicating alkalinity. By measuring the concentration of H+ ions, the pH scale provides a standardized way to compare the acidity or alkalinity of different solutions.

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  • 20. 

    How can one measure OH- concentration?

    • A.

      PH scale

    • B.

      POH scale

    • C.

      Both of these

    • D.

      This is choice D

    Correct Answer
    B. POH scale
    Explanation
    One can measure OH- concentration using the pOH scale. The pOH scale is the negative logarithm of the concentration of OH- ions in a solution. It is used to measure the basicity or alkalinity of a solution, just like the pH scale is used to measure acidity. By measuring the pOH of a solution, one can determine the concentration of OH- ions present. Therefore, the correct answer is the pOH scale.

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  • 21. 

    Which of these is true?

    • A.

      As pH increases, [H+] decreases

    • B.

      As pH increases, [H+] increases

    • C.

      As pH decreases, [H+] increases

    • D.

      Both A and C

    Correct Answer
    D. Both A and C
    Explanation
    As pH increases, the concentration of hydrogen ions ([H+]) decreases. This is because pH is a measure of the acidity or alkalinity of a solution, with a lower pH indicating higher acidity and a higher concentration of hydrogen ions. Therefore, as pH increases, the solution becomes more alkaline and the concentration of hydrogen ions decreases. Conversely, as pH decreases, the solution becomes more acidic and the concentration of hydrogen ions increases. Therefore, both statements A and C are true.

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  • 22. 

    If a substance has a pH of 3, what is its OH- concentration?

    • A.

      3

    • B.

      11

    • C.

      10^-3

    • D.

      10^-11

    Correct Answer
    D. 10^-11
    Explanation
    The pH scale measures the acidity or basicity of a substance. A pH of 3 indicates that the substance is acidic. The concentration of OH- ions in an acidic solution is very low. As the pH decreases, the concentration of OH- ions decreases exponentially. Therefore, a substance with a pH of 3 would have an OH- concentration of 10^-11.

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  • 23. 

    What is a buffer?

    • A.

      A substance that encourages change in pH

    • B.

      A substance that resists change in pH

    • C.

      A substance that speeds up a chemical reaction

    • D.

      A substance that stops a chemical reaction

    Correct Answer
    B. A substance that resists change in pH
    Explanation
    A buffer is a substance that resists changes in pH. It is able to maintain a relatively stable pH even when small amounts of acid or base are added. Buffers typically consist of a weak acid and its conjugate base, or a weak base and its conjugate acid. These components can react with any added acid or base, preventing significant changes in pH. Buffers are important in biological systems, as they help maintain the pH necessary for proper functioning of enzymes and other molecules.

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  • 24. 

    What is the normal pH of blood?

    • A.

      3.2 - 3.4

    • B.

      5.2 - 5.4

    • C.

      7.2 - 7.4

    • D.

      9.2 - 9.4

    Correct Answer
    C. 7.2 - 7.4
    Explanation
    The normal pH of blood is 7.2 - 7.4. pH is a measure of the acidity or alkalinity of a solution, with a pH of 7 being neutral. The pH range of 7.2 - 7.4 indicates that blood is slightly alkaline or basic. This pH range is important for maintaining the proper functioning of enzymes and other biological processes in the body. Deviations from this normal range can lead to health issues such as acidosis or alkalosis.

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  • 25. 

    What is the pH of normal rain?

    • A.

      Less than 5.2

    • B.

      5.4

    • C.

      5.6

    • D.

      Greater than 5.8

    Correct Answer
    C. 5.6
    Explanation
    Normal rain has a pH of 5.6. This means that it is slightly acidic. Rainwater becomes acidic due to the presence of carbon dioxide in the atmosphere, which reacts with water to form carbonic acid. The pH scale ranges from 0 to 14, with values below 7 indicating acidity. A pH of 5.6 suggests that the rainwater is mildly acidic but still within the range of what is considered normal for rain.

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  • 26. 

    What is normal rain made of?

    • A.

      Water and Carbon Dioxide (Carbonic Acid)

    • B.

      Water and Sulfate (Sulfuric Acid)

    • C.

      Water and Nitrate (Nitric Acid)

    • D.

      Either B or C

    Correct Answer
    A. Water and Carbon Dioxide (Carbonic Acid)
    Explanation
    Normal rain is made of water and carbon dioxide (carbonic acid) because when water vapor in the atmosphere condenses, it combines with carbon dioxide to form carbonic acid. This is a natural process that occurs due to the presence of carbon dioxide in the air.

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  • 27. 

    What is the pH of acid rain?

    • A.

      Less than 5.2

    • B.

      5.4

    • C.

      5.6

    • D.

      Greater than 5.8

    Correct Answer
    A. Less than 5.2
    Explanation
    Acid rain is formed when pollutants such as sulfur dioxide and nitrogen oxides react with the atmosphere. These pollutants dissolve in rainwater, forming sulfuric acid and nitric acid, which lower the pH of the rainwater. A pH value below 5.2 indicates that the rainwater is acidic, confirming that the correct answer is less than 5.2.

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  • 28. 

    What is acid rain made of?

    • A.

      Water and Carbon Dioxide (Carbonic Acid)

    • B.

      Water and Sulfate (Sulfuric Acid)

    • C.

      Water and Nitrate (Nitric Acid)

    • D.

      Either B or C

    Correct Answer
    D. Either B or C
    Explanation
    The correct answer is either B or C because acid rain is made of water combined with either sulfate (forming sulfuric acid) or nitrate (forming nitric acid). Acid rain is a result of air pollution, particularly from the burning of fossil fuels, which releases sulfur dioxide and nitrogen oxides into the atmosphere. These gases react with water vapor in the air to form sulfuric acid or nitric acid, which then falls to the earth as acid rain.

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  • Aug 25, 2023
    Quiz Edited by
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