Part 1: Core Ideas

1. What is all matter made of?

Energy only

Tiny particles

Light waves

2. Which of the following is an element?

Oxygen

Salt water

Carbon dioxide

3. Which particle has a negative charge?

Proton

Neutron

Electron

4. Which is a chemical change?

Ice melting

Paper burning

Water boiling

Part 2: Classify and Complete

5. Complete the sentence: An element contains only one type of __________.

6. Write element, compound, or mixture for each example.

a) Copper: ____________________

b) Water: ____________________

c) Air: ____________________

7. Match each particle to its charge by writing the correct charge: positive, negative, or neutral.

a) Proton: ____________________

b) Neutron: ____________________

c) Electron: ____________________

8. Complete the chemical symbols.

a) Hydrogen: ____

b) Oxygen: ____

c) Carbon: ____

Part 3: Explain Your Thinking

9. Explain the difference between a physical change and a chemical change. Give one example of each.

10. Describe two important safety rules for working in a chemistry laboratory.

Foundations of Chemistry

Foundations of Chemistry

Part 1: Core Ideas

Part 2: Classify and Complete

Part 3: Explain Your Thinking

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