4º NS Unit 5 – MATTER AND ENERGY (Activity Book solutions)

HOMEWORK for the weekend:

1. Check the solutions of the exercises in the books of N.S. (Student´s Book and Activity Book).

2. Then, do the TEST.

UNIT 5 Natural Science – MATTER AND FORCES

4º NS ACTIVITY BOOK (solutions)

PAGE 26

SOLUTIONS

1- State GAS example STEAM – State LIQUID example JUICE – State SOLID example SNOW

2- a. volume – b. mass – c. mass – d. mass – e. volume – f. volume.

3- Scale.

4- a4 – b2 – c3 – d1

PAGE 27

SOLUTIONS

5- space – amount – density – volume.

6- a. low – b. high.

7- a. low – b. high.

8- Natural materials (come directly from nature). Manufactured materials (go through a chemical transformation). Some natural materials are (wood and wool). Some manufactured materials are (steel and plastic).

PAGE 28

SOLUTIONS

9- a. cork – b. steel – c. paper – d. wool – e. plastic – f. marble.

10- 2. Resistance – 3. Hardness – 4. Solubility – 5. Elasticity – 6. Colour.

PAGE 29

SOLUTIONS

11- 1a. thermal conductors – 2b. thermal insulators – 3a. the light it reflects and absorbs.

12- b. non-contact – c. gravity – d. north and south – e. repel.

13- a. buoyancy – b. friction – c. friction.

14- a. change in position – b. temporary change – c. permanent change.

PAGE 31

SOLUTIONS

1- a. It is at the local library. – b. It is on Sunday, 24 February. – c. It lasts two hours. – d. It costs 5€. – e. It is called Matter and Forces science workshop. – f. You must be between 10 and 15 years old.