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Understanding Physical and Chemical Changes in Matter
Passage
•
Science
•
7th Grade
•
Practice Problem
•
Hard
John Granger
FREE Resource
5 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a characteristic of physical changes in matter?
They involve changes in shape, size, or state without changing the substance's identity.
They result in the formation of new substances.
They are typically irreversible.
They always involve a change in temperature.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is an example of a chemical change?
Melting ice
Chopping a carrot
Burning a piece of paper
Freezing water
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the process called when a solid changes directly into a gas?
Melting
Sublimation
Condensation
Deposition
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is an indicator of a chemical reaction?
Change in shape
Change in temperature
Change in size
Change in state
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of phase change materials (PCMs) in engineering?
To store and release thermal energy
To change the color of materials
To increase the weight of materials
To conduct electricity
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