Unit 3 Test Study Guide: Matter and Its Changes

Quiz
•
Science
•
8th Grade
•
Hard
+5
Standards-aligned
Zachary Vargas
Used 26+ times
FREE Resource
21 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
The Statue of Liberty's corrosion is made of copper sulfate and copper carbonate. Which of the following statements describes the motion of the molecules?
The molecules of the statue are never moving.
The molecules of the statue are always moving.
The molecules of the statue move only when the sun warms the surface.
The statue of the statute move only when people are looking at it
Answer explanation
The molecules of the Statue of Liberty are always moving due to thermal energy, even in solid materials. This constant motion is a fundamental property of matter, making the correct choice "The molecules of the statue are always moving."
Tags
NGSS.MS-PS3-1
NGSS.MS-PS3-5
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Lucifer left a cup of coffee at 67°C next to a glass of pineapple nectar at 7°C in a 21°C room overnight. The temperature of the two beverages the next day will be about
70°F
27°C
21°C
37°C
Answer explanation
Overnight, both beverages will reach thermal equilibrium with the room temperature of 21°C. Thus, the final temperature of the coffee and pineapple nectar will be about 21°C.
Tags
NGSS.MS-PS1-4
NGSS.MS-PS3-4
3.
MATCH QUESTION
45 sec • 1 pt
Directions: Drag the answers to the correct boxes. The pictures below show the arrangement of particles in three phases of matter. Match the picture with the correct phase of matter.
Solid
Gas
Liquid
Tags
NGSS.MS-PS1-1
NGSS.MS-PS1-4
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Aquaman put a pot of water over a campfire and heated it. He took the temperature of the water as soon as it started to boil. The thermometer showed 100°C. Aquaman turned the heat up and the water continued to boil for 5 minutes. He then took the temperature of the boiling water again. What does the thermometer show?
Less than 100°C; as the water boils away, the boiling point drops.
A sense of betrayal to the people of the water
Exactly 100°C; water boils at a constant temperature.
Greater than 100°C; James increased the heat applied to the boiling water.
Answer explanation
The thermometer will show exactly 100°C because water boils at a constant temperature under normal atmospheric pressure. Increasing the heat does not raise the boiling point; it remains the same as long as the water is boiling.
Tags
NGSS.MS-PS1-4
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
A mercury thermometer has a toxic metal liquid inside it. The level of the liquid metal rises when the thermometer is placed in hot water. Why does the level of the liquid rise?
Water molecules are pushed into the thermometer.
Heat molecules push the molecules of the liquid upward.
Heat causes the molecules of the liquid to go farther apart.
The molecules of the liquid break down into atoms and take up more space.
Answer explanation
The correct answer is that heat causes the molecules of the liquid to go farther apart. As the temperature increases, the kinetic energy of the liquid's molecules increases, leading them to expand and rise in the thermometer.
Tags
NGSS.MS-PS1-4
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
When ice melts, a(n) ---
chemical change rearranges the molecules of water
electrical change prevents current flow through the resulting solution
physical change rearranges the molecules to a new state of matter
thermal change releases thermal energy to the environment
Answer explanation
When ice melts, it undergoes a physical change, transitioning from solid to liquid. This process rearranges the molecules of water into a new state of matter without altering their chemical structure.
Tags
NGSS.MS-PS1-4
NGSS.MS-PS3-4
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which of the following conclusions can be made based on the results of the experiments?
Chemical changes occurred in both experiments.
Physical changes occurred in both experiments.
A chemical change occurred in experiment 1, and a physical change occurred in experiment 2.
A physical change occurred in experiment 1, and a chemical change occurred in experiment 2.
Answer explanation
The experiments resulted in chemical changes, indicating that new substances were formed in both cases. Therefore, the conclusion that chemical changes occurred in both experiments is correct.
Tags
NGSS.MS-PS1-2
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