Grade 7 Chapter 7 Bump Up Quiz
- 1.
What was the purpose of the fan experiment with the perfume in class? (hint: same as what we discussed with making juice)
- 2.
The particle theory involves all of these key ideas, EXCEPT ...
- A.
 All substances have tiny particles
- B.
 All particles in any substance are the same
- C.
 All particles have spaces between them
- D.
All particles are attracted to one another
Correct Answer
B. Â All particles in any substance are the sameExplanation
The particle theory states that all substances have tiny particles, all particles have spaces between them, and all particles are attracted to one another. However, it does not state that all particles in any substance are the same. This means that particles in different substances can have different properties, such as size, shape, and composition.Rate this question:
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- 3.
The particles are vibrating in place and the substance has a definite shape and volume. The state of matter is ...
- A.
Solid
- B.
Liquid
- C.
Gas
- D.
Plasma
Correct Answer
A. SolidExplanation
The given description indicates that the particles in the substance are vibrating in place, which suggests that the particles are closely packed together and have a strong attraction to each other. This characteristic is typical of a solid, where the particles are arranged in a regular pattern and have a fixed shape and volume.Rate this question:
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- 4.
These particles do not form rigid clumps. They can slip past each other. Because of this the particles cannot hold their shape. The state of matter described is ...
- A.
Solid
- B.
Liquid
- C.
Gas
- D.
Plasma
Correct Answer
B. LiquidExplanation
The given explanation describes particles that can slip past each other and cannot hold their shape. This behavior is characteristic of a liquid state of matter. In a solid state, particles are tightly packed and cannot move freely. In a gas state, particles are far apart and move randomly. In a plasma state, particles are highly ionized and have a high energy level. Therefore, the correct answer based on the given explanation is liquid.Rate this question:
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- 5.
Milk is a substance that is fairly common. It should be classified as ...
- A.
Homogeneous
- B.
Mechanical Mixture
- C.
Pure Substance
- D.
Solution
Correct Answer
D. SolutionExplanation
Milk is a mixture composed of various components such as water, proteins, fats, lactose, and minerals. These components are uniformly distributed throughout the milk, resulting in a homogeneous mixture. Therefore, milk can be classified as a solution.Rate this question:
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- 6.
A rock like material appears to be one colour - at a distance - but, upon careful examination, it has many different colours. It should be classified as ...
- A.
A pure substance
- B.
A mechanical mixture
- C.
A solution
- D.
Just a rock with different colors
Correct Answer
B. A mechanical mixtureExplanation
The rock-like material appears to be one color from a distance, but upon closer examination, it is revealed to have many different colors. This indicates that the material is a mechanical mixture, as it is made up of different components that can be visually distinguished. A pure substance would have a uniform composition throughout, while a solution would be a homogeneous mixture with the different colors evenly distributed. Therefore, the best classification for this material is a mechanical mixture.Rate this question:
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- 7.
When you look at a container of salt or a glass of distilled water it is a
- A.
Homogeneous mixture
- B.
Mechanical mixture
- C.
Mixture
- D.
A substance
Correct Answer
A. Homogeneous mixtureExplanation
A homogeneous mixture refers to a combination of substances that are uniformly distributed throughout, resulting in a consistent composition and appearance. In the case of a container of salt or a glass of distilled water, both substances are completely dissolved and evenly distributed, creating a homogeneous mixture. This means that every part of the mixture will have the same proportion of salt or water, making it difficult to distinguish between the two components.Rate this question:
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- 8.
Kinetic energy is the energy of movement. In solids, the particles
- A.
Move very fast
- B.
Move around each other
- C.
Never moveÂ
- D.
Vibrate
Correct Answer
D. VibrateExplanation
In solids, the particles are closely packed together and have limited freedom of movement. However, they still possess kinetic energy in the form of vibrations. These vibrations occur due to the thermal energy present in the solid, causing the particles to oscillate around their equilibrium positions. Therefore, the correct answer is "vibrate".Rate this question:
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- 9.
The particles of a pure substance are
- A.
The same
- B.
Different
- C.
Similar
- D.
Stick to each other
Correct Answer
A. The sameExplanation
The correct answer is "the same" because in a pure substance, all particles are identical in terms of their composition and properties. They have the same chemical formula and are made up of the same type of atoms or molecules. This uniformity allows the substance to have consistent physical and chemical characteristics throughout.Rate this question:
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- 10.
When you melt a chocolate bar, what actually happens to the chocolate particles?
- A.
They move closer together
- B.
They get excited and move further apart
- C.
The chocolate particles evaporate
- D.
The particles speed up so fast the collide and break apart
Correct Answer
B. They get excited and move further apartExplanation
When a chocolate bar is melted, the heat causes the chocolate particles to gain energy and become excited. This increased energy causes the particles to move more rapidly and spread further apart from each other. As a result, the chocolate melts and becomes a liquid. The option "They get excited and move further apart" accurately describes this process of melting chocolate.Rate this question:
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- 11.
When you boil water for a hot drink, you see steam rising from the surface of the water. What is this an example of ?
- A.
Evaporation
- B.
Condensation
- C.
Sublimation
- D.
Steamanation
Correct Answer
A. EvaporationExplanation
When you boil water, the heat causes the water molecules to gain energy and move faster. As a result, some of the water molecules at the surface gain enough energy to break free from the liquid phase and become water vapor or steam. This process is known as evaporation. Therefore, the steam rising from the surface of the water when boiling is an example of evaporation.Rate this question:
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- 12.
After you take a hot shower, you see water on the surface of the mirror in the bathroom. Changing state from a gas to a liquid is called...
- A.
Condensation
- B.
Evaporation
- C.
Sublimation
- D.
Boiling
Correct Answer
A. CondensationExplanation
When you take a hot shower, the steam from the hot water comes into contact with the cold surface of the mirror. This causes the steam to lose heat energy and slow down, eventually turning into liquid water droplets. This process is called condensation, which refers to the change of state from a gas (steam) to a liquid (water) when it loses heat.Rate this question:
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- 13.
We talked in class about evaporation. What happens when you boil salt water?
- A.
Water evaporates but the salt stays
- B.
Water boils
- C.
Water evaporates with the salt
- D.
Salt evaporates
Correct Answer
A. Water evaporates but the salt staysExplanation
When you boil salt water, the water molecules gain enough energy to break their bonds and escape into the air as vapor, which is the process of evaporation. However, the salt particles are too large and cannot evaporate with the water. Therefore, as the water evaporates, the salt remains behind in the container.Rate this question:
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- 14.
How long did you study for this quiz?
- A.
10-20 min
- B.
20-40min
- C.
40-60min
- D.
I did not study at all
Correct Answer
C. 40-60minExplanation
The correct answer is 40-60min. This suggests that the person studied for a considerable amount of time, between 40 to 60 minutes, in preparation for the quiz. They dedicated a substantial period to review the material and enhance their understanding, indicating a higher likelihood of performing well on the quiz compared to those who studied for shorter durations or did not study at all.Rate this question:
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- 15.
How did you study?
- A.
Used my notes
- B.
Used my study sheet that I made in class
- C.
Read through chapter 7
- D.
I did not study
Correct Answer
A. Used my notesExplanation
The correct answer is "Used my notes". This implies that the person studied by referring to their own notes, which suggests that they had taken notes during their classes or previous study sessions. Using notes can be an effective study method as it helps in reviewing and reinforcing the material learned.Rate this question:
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Mar 21, 2023Quiz Edited by
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Sep 24, 2014Quiz Created by
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