Theory

Exercises

1. Changes and its examples

Difficulty: easy

2
2. Types of changes

Difficulty: easy

2
3. Reversible and irreversible process

Difficulty: medium

4
4. Changes according to season

Difficulty: easy

1
5. Changes in substances

Difficulty: medium

4
6. Changes in water

Difficulty: medium

4
7. Natural and man-made changes

Difficulty: medium

4
8. Chemical changes and its reasoning

Difficulty: hard

9
9. Natural and man-made changes

Difficulty: medium

5
10. Types of changes with explained examples

Difficulty: medium

6
11. Water and its natural changes

Difficulty: easy

2
12. Change of states in water

Difficulty: hard

9
13. Process related to changes

Difficulty: easy

3

Tests

1. Training test 1

Difficulty: easy

8
2. Training test 2

Difficulty: medium

10

Teacher content