Section Assessment

Section Summary

I Changes of state involve thermal energy.

I The law of conservation of matter states that matter cannot be created or destroyed.

I The law of conservation of energy states that energy is neither created nor destroyed.

Understand Main Ideas

1. i man hTM Explain how thermal energy is involved in changes of state.

2. Evaluate the nature of the thermal vibrations in each of the four states of matter.

3. Apply what you know about thermal energy to compare evaporation and condensation.

Think Critically

4. Infer how the boiling point of water (100°C) would change if water molecules were not polar molecules.

5. Consider glass and diamond—two clear, colorless solids. Why does glass shatter more easily than diamond?

■Miiii^ Earth Science

6. Refer to Figure 3.18. Calculate the corona's temperature in degrees. Remember that 273 K is equal to 0°C.

Earth -Schick il ne

Self-Check Quiz glencoe.com

Section 3 • States of Matter 75

Earth -Schick

Self-Check Quiz glencoe.com

Section 3 • States of Matter 75

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Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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