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ACTIVITY 2: Brain Power Directions: Read the statement carefully and circle the correct answer.
1. If gravitation suddenly stops, Earth will move
a. nowhere b.in the same orbit c. in a straight line d. in the opposite direction
2. Why do planets and their moons stay in orbit as they revolve around the sun? Because of
a, inertia b. friction c. gravitation d. momentum
3. When a leaf falls from a tree, the force acting on the leaf is
a. friction b. gravity c. balanced d. magnetism
4. The north and south poles of two magnets
a. attract each other b. repels each other c. align with each other d. magnetize each other
5. The force gravitation between two objects is less when
a. the total of their masses is greater c. friction between them is greater b. the force of magnetism is greater d. the distance between them is greater
6. Which of the following is a force?
a. acceleration b. inertia C. friction d. magnetism
7. What decreases the amount of friction?
a. more speed b. a smoother surface c. more surface area d. a rougher surface
8. What does an object's weight depend on?
a. shape b. mass c. speed d. volume
9. What force can help a skydiver falling to earth with a parachute?
a friction b. air resistance c. water tension d. force of gravity
10. Which of the following happens when an object moves away from earth?
a. mass decreases and weight decreases b. mass decreases and weight increases c. mass stays the same and weight decreases d. mass stays the same and weights stays the same
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