Chemistry U2 Review

Quiz
•
Science
•
8th Grade
•
Medium
+1
Standards-aligned
Sireen Hamdan
Used 5+ times
FREE Resource
18 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which phrase describes the changes that take place when a gas condenses?
loss of energy and increased freedom of particle motion
gain of energy and increased freedom of particle motion
loss of energy and decreased freedom of particle motion
gain of energy and decreased freedom of particle motion
Answer explanation
When a gas condenses, it loses energy, causing particles to move closer together, resulting in decreased freedom of motion. Thus, the correct phrase is 'loss of energy and decreased freedom of particle motion'.
Tags
NGSS.MS-PS1-4
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Frost forms when water vapor changes directly from a gas to ice in a process called deposition. If you were to model the water particles before and after deposition, how would they compare?
Before deposition, the particles vibrate in place; after deposition, they slide by each other.
Before deposition, the particles slide by each other; after deposition, they vibrate in place.
Before deposition, the particles vibrate in place; after deposition, they move quickly in all directions.
Before deposition, the particles move quickly in all directions; after deposition, they vibrate in place.
Answer explanation
Before deposition, water vapor particles move freely and slide past each other. After deposition, they lose energy and become fixed in place, vibrating slightly as ice. Thus, the correct choice is that particles slide before and vibrate after.
Tags
NGSS.MS-PS1-4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does thermal energy transfer take place when water (warmer) freezes to form ice crystals in the atmosphere (cooler)?
Energy is transferred from the air into the water.
Energy is transferred from the water into the air.
Energy is transferred from the water into the ground.
Energy is transferred from warmer ice crystals to colder ones.
Answer explanation
When water freezes, it releases thermal energy. This energy is transferred from the warmer water into the cooler air, causing the water to lose heat and form ice crystals.
Tags
NGSS.MS-PS1-4
NGSS.MS-PS3-4
NGSS.MS-PS3-5
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
After an hour in the cooler, the sodas get colder and the ice gets warmer. Which of the following explains these changes correctly?
The coldness is leaving the ice and going into the soda.
The heat is leaving the ice and going into the soda.
The coldness is leaving the soda and going into the ice.
The heat is leaving the soda and going into the ice.
Answer explanation
The correct choice is that heat is leaving the ice and going into the soda. This process causes the ice to warm up while the sodas absorb that heat, making them colder.
Tags
NGSS.MS-PS1-4
NGSS.MS-PS3-3
NGSS.MS-PS3-4
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Particles are spaced the farthest apart in ________ and the closest together in ________. Select the answer that best completes the sentence.
liquids; solids
gases; liquids
solids; gases
gases; solids
Answer explanation
Particles are spaced the farthest apart in gases, where they move freely, and the closest together in solids, where they are tightly packed in a fixed structure. Thus, the correct completion is 'gases; solids'.
Tags
NGSS.MS-PS1-4
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why does solid water (ice) float when placed in liquid water?
Ice is less dense than liquid water.
Ice has less mass than the water in which it is floating.
Ice has less volume than the water in which it is floating.
Answer explanation
Ice floats in liquid water because it is less dense than water. The molecular structure of ice creates a lattice that occupies more space, resulting in lower density compared to liquid water, allowing it to float.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Energy in the form of heat was applied to a beaker containing a certain substance. The particles of the substance began to move farther apart until they were arranged as shown by the arrow in the diagram.
What change of state occurred to the substance in the beaker?
The substance changed from a gas to a solid.
The substance changed from a liquid to a gas.
The substance changed from a gas to a liquid.
The substance changed from a liquid to a solid.
Answer explanation
The application of heat causes the particles of a liquid to gain energy and move farther apart, resulting in a change from a liquid to a gas, known as vaporization. Thus, the correct answer is that the substance changed from a liquid to a gas.
Tags
NGSS.MS-PS1-4
NGSS.MS-PS3-4
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