Theory

Exercises

1. Constituents of air

Difficulty: easy

2
2. Air and its uses

Difficulty: easy

2
3. Air and its properties

Difficulty: medium

4
4. Properties of air

Difficulty: easy

1
5. Atmosphere

Difficulty: medium

3
6. Composition of air

Difficulty: medium

4
7. Gases used by plants and animals

Difficulty: medium

3
8. Contents of air

Difficulty: hard

9
9. Terms of air

Difficulty: easy

3
10. Smoke and constituents of air

Difficulty: medium

4
11. Gases used for various processes

Difficulty: hard

7
12. Oxygen and its neccessity

Difficulty: medium

4
13. Gases present in the air

Difficulty: easy

3
14. Gases involved in various process

Difficulty: easy

2
15. Air composition

Difficulty: easy

3

Tests

1. Training test 1

Difficulty: medium

8
2. Training test 2

Difficulty: easy

8

Teacher content