Dr. Zohra Sattar Waxali earned her doctorate in chemistry and biochemistry from Northwestern University, specializing in the metallomes of cardiac cells and stem cells, and their impact on biological function. Her research encompasses the development of arsenoplatin chemotherapeutics, stapled peptide estrogen receptor inhibitors, and antimicrobial natural products. With her expertise, Dr. Waxali ensures the accuracy and relevance of our chemistry quizzes, contributing to a comprehensive understanding of chemical principles and advancements in the field.
, PhD, Chemistry
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Do you know everything about the states of matter? Take this state Of matter trivia quiz for 7th grade, and know if you have studied well or not. It is just a memory test where you can recall everything you have learned in the science chapter of states of matter. You can take the quiz, choose your answers, and we will reveal the results in the end. All the best! You can share it with 7th-grade students or friends and see how good is their knowledge.
Questions and Answers
1.
How many states of matter are there?
A.
5
B.
2
C.
3
D.
4
Correct Answer A. 5
Explanation Matter encompasses entities that occupy space and possess mass, such as air, water, and notebooks. Traditionally, matters manifest in three states under normal conditions, but scientific exploration has unveiled two additional states. These states undergo transitions facilitated by the absorption or release of heat energy. The five distinct states of matter include Bose-Einstein condensate, solid, liquid, gas, and plasma.
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2.
The conversion of matter from solid state to liquid state is called
A.
Vaporization.
B.
Melting
C.
Evaporation
D.
Condensation
Correct Answer B. Melting
Explanation Melting is the correct answer because it refers to the process by which a substance changes from its solid state to its liquid state. This occurs when heat is applied to a solid, causing its particles to gain enough energy to break free from their fixed positions and move more freely, resulting in the substance becoming a liquid.
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3.
Which of the following does not take the shape of the container it is in?
A.
A pencil.
B.
Oil
C.
Water.
D.
Air
Correct Answer A. A pencil.
Explanation A pencil does not take the shape of the container it is in because it is a solid object with a fixed shape. Unlike liquids such as oil and water and gasses like air, solids have a fixed shape regardless of the container they are placed in.
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4.
I can easily compress the water in a jar to reduce its volume.
A.
True
B.
False
Correct Answer B. False
Explanation Water is an incompressible substance, meaning that its volume cannot be easily reduced by applying pressure. Unlike gasses, which can be compressed, water molecules are tightly packed together and have very little empty space between them. Therefore, it is not possible to compress water in a jar to reduce its volume easily.
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5.
When water evaporates, it turns into solid.
A.
True
B.
False
Correct Answer B. False
Explanation Water does not turn into a solid when it evaporates. Evaporation is the process by which water changes from a liquid state to a gas state. When water evaporates, it turns into water vapor, not a solid.
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6.
Which state of matter spreads itself thinner and thinner until it fills the entire volume of the container irrespective of its size?
A.
Liquid
B.
Gas
C.
Solid
D.
All of the above
Correct Answer B. Gas
Explanation Gas has the ability to spread itself thinner and thinner and fill the entire volume of the container. In the gas state, the particles are highly energetic and move freely, causing them to spread out and fill the available space.
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7.
Water conforms in all directions to take the shape of the container it is in.
A.
False.
B.
True
Correct Answer B. True
Explanation Water is a liquid, and liquid particles can slide against each other easily. This allows water and other liquid particles to take the shape of their containers.
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8.
Select the correct statement:
A.
An ice cube becomes gas at its melting point.
B.
An ice cube becomes liquid at its melting point.
C.
Both of the above
D.
None of the above
Correct Answer B. An ice cube becomes liquid at its melting point.
Explanation At its melting point, an ice cube undergoes a phase change from a solid to a liquid. This is because the melting point is the temperature at which the solid ice gains enough energy to break its rigid structure and transition into a more fluid state. Therefore, the correct statement is that an ice cube becomes liquid at its melting point.
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9.
Choose the right statement.
In solids, the molecules are packed the closest together.
In gasses, the molecules are spread out the most.
In liquids, the molecules are packed closer together.
A.
Statement a alone is right.
B.
Statement b alone is right
C.
All the above statements are right.
D.
None of the above is right.
Correct Answer C. All the above statements are right.
Explanation The correct answer is "All the above statements are right." This is because the statements in options a, b, and c are all individually correct. In solids, the molecules are packed the closest together, in gasses, the molecules are spread out the most, and in liquids, the molecules are packed closer together. Therefore, all three statements are true, making option d incorrect.
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10.
Pick the true statement
A.
Liquids can freeze.
B.
Solids can freeze.
C.
None of the above
D.
All are correct.
Correct Answer A. Liquids can freeze.
Explanation The statement "Liquids can freeze" is correct because liquids can undergo a phase change and solidify when their temperature is lowered below their freezing point. This process is commonly observed in everyday life when water turns into ice. On the other hand, gasses cannot freeze directly into a solid state; they first need to undergo condensation to become a liquid before freezing. Solids, by definition, are already in a frozen state and do not freeze further. Therefore, the correct statement is that liquids can freeze.
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Zohra Sattar |PhD, Chemistry|
Chemistry Expert
Dr. Zohra Sattar Waxali earned her doctorate in chemistry and biochemistry from Northwestern University, specializing in the metallomes of cardiac cells and stem cells, and their impact on biological function. Her research encompasses the development of arsenoplatin chemotherapeutics, stapled peptide estrogen receptor inhibitors, and antimicrobial natural products. With her expertise, Dr. Waxali ensures the accuracy and relevance of our chemistry quizzes, contributing to a comprehensive understanding of chemical principles and advancements in the field.
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