Cells that conduct messages are known as
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OPTIONS:
- skin cells
- nerve cells
- blood cells
- kidney cells

nerve cells

Signs in many stores and restaurants warn that microwaves are in use. What is the main reason for this warning?
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OPTIONS:
- Some people do not like food cooked in microwave ovens.
- Microwaves sometimes affect people's sense of sight.
- Microwaves sometimes cause hair or teeth to fall out.
- Some people have pacemakers that may be affected by microwaves.

Some people have pacemakers that may be affected by microwaves.

What happens to water molecules during the boiling process?
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OPTIONS:
- They move faster and move farther apart as they absorb heat.
- They move faster and remain close together as they absorb heat.
- They move more slowly but move farther apart as they lose heat.
- They move faster and move farther apart as they lose heat.


They move faster and move farther apart as they absorb heat.