Question

Which of the following is an example of a physical change, but not a chemical change?
1 point
C. a log gives off light and heat as it burns
A. a tree stores energy from the Sun in its fruit
B. a penny left outside slowly turns green
D. a water pipe freezes and cracks on a cold night
Which of the following are examples of a physical change, but not a chemical change? Check all that apply.
1 point
A. a saw cutting through a log
B. a bomb exploding
C. a pitcher of frozen juice melting
D. milk going sour
The temperature at which a substance changes between solid and liquid phases is its
1 point
A. boiling point
B. critical point
C. evaporation point
D. melting point.
The melting and boiling points of a substance change depending on how much of the substance is present.
1 point
True
False
Eliot is given a sample of unknown liquid to test in the laboratory. Eliot thinks that the liquid is water, but he isn’t sure. Which of the following would be most helpful for Eliot to test in order to determine whether or not the liquid is water?
1 point
A. volume of the liquid
B. mass of the liquid
C. color of the liquid
D. boiling point of the liquid
The temperature at which a substance changes between liquid and gas phases is its
1 point
A. boiling point
B. critical point
C. evaporation point
D. freezing point
C. color of the liquid
Option 6
In which of the following does matter change form without becoming a new substance? (Choose all that apply)
1 point
A. physical change
B. boiling
C. melting
D. chemical change
Daryl adds 100 mL of boiling water to 200 mL of ice water. If she then puts the 300 mL of water into a freezer, at what temperature will the water freeze?
1 point
A. 0°C
B. 15°C
C. 30°C
D. 100°C
Aaron measured the mass of a closed beaker that contained several ice cubes. The mass of the beaker was 125 g. Two hours later, after the ice cubes melted, Aaron took the mass of the beaker again. What was the mass of the beaker of water the second time Aaron measured it?
1 point
A. 75 g
B. 100 g
C. 125 g
D. 150 g
Which of the following is less likely to be irreversible?

A. a physical change
B. a chemical change

Answer 1

Answer:

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A

A

D

A

C the answers are correct