Chapter 3: States of Matter Study Guide

Which state of matter has a definite volume but a variable shape?

• solid

• liquid

• gas

• vapor

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Which statement is true about the atoms in helium gas?

• They travel in circular paths.

• They have strong attractions to one another.

• They are not closely packed.

• They are arranged in an orderly pattern

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NGSS.HS-PS3-2

Boyle’s law relates pressure and

• Temperature

• number of particles

• volume

• mass

Which of the following changes is exothermic?

• evaporation

• freezing

• boiling

• sublimation

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Which of these phase changes does NOT involve changing a liquid into a gas?

• sublimation

• vaporization

• evaporation

• boiling

12. Compare and contrast liquid water and ice in terms of how definite their shapes and volumes are.

• Liquid water has a definite shape and volume, while ice does not.

• Ice has a definite shape and volume, while liquid water does not.

• Both liquid water and ice have definite shapes and volumes.

• Neither liquid water nor ice have definite shapes and volumes.

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NGSS.MS-PS1-4

20. How are the pressure and volume of a gas related?

• They are directly proportional.

• They are inversely proportional.

• They are not related.

• They are equal.

21. How does an endothermic phase change differ from an exothermic phase change?

• Endothermic phase changes absorb energy, while exothermic phase changes release energy.

• Endothermic phase changes release energy, while exothermic phase changes absorb energy.

• Both endothermic and exothermic phase changes absorb energy.

• Both endothermic and exothermic phase changes release energy.

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22. Compare the vapor pressure of water at 10°C with its vapor pressure at 50°C.

• The vapor pressure is higher at 10°C.

• The vapor pressure is higher at 50°C.

• The vapor pressure is the same at both temperatures.

• The vapor pressure cannot be determined.

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NGSS.MS-PS1-4

Why does water have a different boiling point at an elevation of 3000 meters than it does at sea level?

• Because the atmospheric pressure is lower at higher elevations.

• Because the temperature is higher at higher elevations.

• Because the water is purer at higher elevations.

• Because the gravitational force is stronger at higher elevations.