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1. What factor causes the motion of the car to slow down as it is moving up the slope of a mountain? A. The gravity of the earth that pulls the car down the slope B. The force of the car that decreases as it goes up the slope C. The weight of the car that increases as it moves up a mountain D. The frictional force between the road and the wheels of the car that decreases as it moves up a mountain
2. When a ball left to roll on the surface of the wood, the ball slows down after a time and eventually stops. What factor causes the ball to slow down and stop? A. magnet B. friction C. gravity D. electricity
3. A bicycle moves faster on a cemented road than on a bumpy road. Why? A. Friction is greater on a cemented road. B. Friction is lesser on a cemented road. C. There is no friction on a cemented road. D. The bicycle can roll only on a cemented road.
4. Why does a car travel faster in going down than in going up? A. It is moving against gravity. B. It is being pushed by the wind. C. It is moving toward gravity. D. It is being pulled by the weight of the car.
5. Why is it difficult to climb up the stairs rather than to go down the stairs? You A. go with gravity. B. are against gravity. C. move upward. D. move downward.
6. Which of the following shows the presence of friction? A. cars continuously roll down hills B. things fall of on smooth surfaces C. people stay in place as they move D. cars stop when the driver steps on the brakes
7. How distance between two objects affects the pull of gravity? A. the lesser the distance, the lesser the gravitational pull between them B. the greater the distance, the lesser the gravitational pull between them C. the greater the distance, the greater the gravitational pull between them D. none of these, gravitational pull between them depends on the weights
8. Which is true about mass and gravity? A the lesser the mass of the objects, the greater the pull of the gravity B. the greater the mass of the objects, the lesser the pull of the gravity C. the greater the mass of the objects, the greater the pull of the gravity
We also learned how plate tectonics is important in the formation of rock, mountains, volcanoes and earthquakes. Studying the interior of the Earth helps learn about all of these and the processes that helped create the Earth and currently drive plate tectonics.
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