Day 2 Lesson 3.8 Floating or sinking?

1. Why did the clay boat floated?

• a. because it is compact

• b. because it is dense

• c. because it is shallow

• d. because it is hollow

2. Another factor that makes ships float is their ballasts. how do the ballasts work in a cruise ship?

• a. It fills with gasoline

• b. It fills with air

• c. It fills with water

• d. It fills with petrol

3. Humans can float on water. Give one reason why we can float?

• a. humans are dense

• b. human body is compact

• c. Humans have lungs that act like ballasts

• d. Humans have an engine that acts like ballasts

4. What is the reason why most objects float, even heavy cargo ships? Explain the meaning of displacement.

5. After understanding the concept of displacement, how confident are you to explain why objects float on water?

• a. I am very confident

• b. I can explain but I cannot give examples

• c. No, I am not confident at all.