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- 1. Multiple Choice
The transition from a solid directly to a gas is known as
melting.
sublimation.
condensation.
vaporization.
- 2. Multiple Choice
According to the Law of Conservation of Mass, if you dissolve 50 g of sugar in 200 g of water, the total mass of the mixture would be
1000 grams
150 grams
250 grams
40 grams
- 3. Multiple Choice
Which of the following is NOT an example of a physical change?
Water freezing
Wood breaking apart
Salt dissolving in water
Baking soda and vinegar combine and form bubbles
- 4. Multiple Choice
What do particles of most substances tend to do when a substance is cooled?
Speed up and move farther apart
Slow down and move farther apart
Slow down and come closer together
Speed up and come closer together
- 5. Multiple Choice
Which of the following is an example of condensation?
Liquid water being cooled until it forms ice
Iodine crystals changing to a purple vapor
A mud puddle shrinking in the sunlight
Moisture forming on the surface of a cold mirror
- 6. Multiple Choice
Boiling and evaporation are two examples of _______________, where a liquid changes to a gas.
vaporization
condensation
sublimation
deposition
- 7. Multiple Choice
You heat up a liquid until it boils into a gas. You record the following temperatures (in degrees Celsius) every 20 seconds: 92, 96, 97, 98, 100, 100, 100, 100, 103, 105. At what temperature did boiling likely occur?
105 degrees Celsius
98 degrees Celsius
100 degrees Celsius
105 degrees Celsius
- 8. Multiple Choice
Which of the following is an example of a physical change?
Lighting a match
Separating dyes by chromatography
Water's boiling point = 100 degrees Celsius
Baking soda reacting with vinegar
- 9. Multiple Choice
What makes water unique compared to other substances?
It expands when it freezes.
It shrinks when it freezes.
It isn't unique at all.
It's extremely reactive
- 10. Multiple Choice
Ice is ____________ dense than liquid water.
a lot more
slightly more
slightly less
a lot less
- 11. Multiple Choice
CHALLENGE: Which of the following describes ONLY physical changes?
Breaking a wooden board, Lighting a candle, Dissolving sugar in water
Lighting a candle, iron rusting, dissolving salt in water
Breaking a wooden board, baking pancakes that rise a little, Chromatography
Chromatography, Breaking a wooden board, Dissolving sugar in water
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