Podcast
Questions and Answers
Did the water undergo a physical or chemical change when it froze?
Did the water undergo a physical or chemical change when it froze?
- Chemical change
- Physical change (correct)
- No change occurred
- Biological change
What caused the change of state from water to ice in the cup?
What caused the change of state from water to ice in the cup?
- Exposure to sunlight
- Cooling in the freezer (correct)
- Increase in pressure
- Evaporation of water
What would most likely happen to the ice if the cup is left on a sunny window?
What would most likely happen to the ice if the cup is left on a sunny window?
- It will become water vapor
- It will freeze further
- It will stay the same
- It will melt (correct)
What would most likely happen to the level of the water if the cup is left on a sunny window?
What would most likely happen to the level of the water if the cup is left on a sunny window?
Which property best describes the two solid blocks labeled A and B?
Which property best describes the two solid blocks labeled A and B?
Flashcards
Physical Change
Physical Change
Changing the form or appearance of a substance without altering its chemical composition.
Freezing
Freezing
The process of a substance changing from a liquid to a solid state.
Melting
Melting
A physical change where heat energy causes a substance to transform from a solid to a liquid.
Expansion and Contraction
Expansion and Contraction
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What Happens to Ice and Water in the Sun?
What Happens to Ice and Water in the Sun?
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Study Notes
Extra Practice 3.1
- Two solid, shiny, silver blocks (A and B) are pictured.
- Four properties can be used to determine if they are the same substance.
- Jim pours water into a plastic cup (labeled A) and covers it with plastic wrap.
- The water level is marked.
- He places the cup in the freezer overnight.
- The next morning, the water is frozen into ice, and the level has increased.
Questions
-
Did the water undergo a physical or chemical change?
- A physical change occurred.
-
What caused the change of state?
- The water changed from a liquid to a solid state due to the low temperature in the freezer.
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What would most likely happen to the ice if the cup is left on a sunny window?
- The ice would melt.
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What would most likely happen to the level of the water, if the cup is left on a sunny window?
- The level of water would increase.
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