Physical Changes

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

• melting.

• sublimation.

• condensation.

• vaporization.

Tags

NGSS.MS-PS1-4

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

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

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NGSS.MS-PS1-2

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

Tags

NGSS.MS-PS1-4

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

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-4

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

• vaporization

• condensation

• sublimation

• deposition

Tags

NGSS.MS-PS1-4

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

Tags

NGSS.MS-PS1-4

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

Tags

NGSS.MS-PS1-2

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

Tags

NGSS.MS-PS1-4

Ice is ____________ dense than liquid water.

• a lot more

• slightly more

• slightly less

• a lot less

Tags

NGSS.MS-PS1-4