Science 3, Unit 2 Revision 01, March 2021

1. Which structure is a square-based quadrilateral or cube?

• a. tetrahedron

• b. rhombus

• c. parallelogram

• d. pyramid

2. If I were to change the materials of this hut; metal for structures, concrete blocks for walls and stucco for the roof, what will this house turn into?

• a. It will turn into a feeble and easy to wear out house

• b. It will turn into a huge and humongous house.

• c. It will turn into a strong and durable house.

• d. It will turn into a tiny and weak house.

3. This diving plank is elastic. It’s supposed to bend and get back to its original shape. But why do you think this diving board broke when this heavy-weight man hopped on it?

• a. Because it is brittle

• b. Because it is rigid

• c. Because it is very elastic

• d. Because it is just slightly elastic

4. If you compare a spoon from a cargo ship, the spoon is lighter than it. But why does the spoon sinks in water while the cargo ship floats?

• a. Because the ship is compact

• b. Because the ship has a hollow hull

• c. Because the spoon is compact

• d. Because the spoon is hollow

5. Looking at this boy spilling the milk, we can suggest that he use paper towel to clean the mess? Why do you think we can suggest that?

• a. Because the paper towel is waterproof

• b. Because the paper towel is absorbent

• c. Because the paper towel is easy to tear

• d. Because the paper towel repels water

6. In fly-boarding, why can the fly-board move without humans pushing, pulling or twisting it?

• a. Because human’s twist force makes it move

• b. Because human’s push force makes it move

• c. Because gravity’s push force makes it move

• d. Because water’s push force makes it move

7. Why do humans float on the moon?

• a. Because it’s all ocean on the moon

• b. Because it’s all gases on the moon

• c. Because gravity is very less on the moon

• d. Because gravity is strong on the moon

8. In this picture, where are push forces come from?

• a. From the car only

• b. From the wall only

• c. From both car and wall

• d. From both walls

9. Why did this boy manoeuvre the bike’s handle?

• a. To change the bike’s direction

• b. To pull the bike backward

• c. To push the bike forward

• d. To stop the bike

10. What do you call that force when you press something firmly from both sides at the same time?

• a. Twist

• b. squash

• c. stretch

• d. squeeze