Physical Changes

Front

The transition from a solid directly to a gas is known as

Back

sublimation.

Front

According to the Law of Conservation of Mass, if you dissolve 50 g of sugar in 200 g of water, what is the total mass of the mixture?

Back

250 grams

Front

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

Back

Baking soda and vinegar combine and form bubbles

Front

What do particles of most substances tend to do when a substance is cooled?

Back

Slow down and come closer together

Front

Which of the following is an example of condensation?

Back

Moisture forming on the surface of a cold mirror

Front

Boiling and evaporation are two examples of _______________, where a liquid changes to a gas.

Back

vaporization

Front

At what temperature did boiling likely occur? Temperatures recorded every 20 seconds: 92, 96, 97, 98, 100, 100, 100, 100, 103, 105 (in degrees Celsius).

Back

100 degrees Celsius

Front

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

Back

Separating dyes by chromatography

Front

What makes water unique compared to other substances?

Back

It expands when it freezes.

Front

Ice is ____________ dense than liquid water.

Back

slightly less