Name _________________ Date -

Gravity – A Familiar Force

In the blank at the left, write the letter of the term that correctly completes each statement.

1. Every object in the universe exerts a force on every other object. This force is called -

a. friction b. gravity

2. The measure of the force of gravity on an object is the object's

a. weight b. inertia

3. The amount of gravitational force between two objects depends on their

a. color and density b. mass and distance

4. Weight is measured in units ca11ed

a. Newtons b. seconds

5. The greater an object's _______, the stronger the gravitational force on it.

a. mass b. velocity

6. Mass is measured in units called

a. meters and kilometers b. grams and kilograms

7. A scale uses the principle of _____ to measure how much something weighs

a. acceleration b. balanced forces

8. Earth exerts a stronger gravitational force than the moon because ______ has more mass.

a. the moon b. Earth

9. The masses of your hand and your notebook are quite small, so the force of attraction between

them is

a. strong b. weak

10. An object transported from the surface of Earth to the surface of the moon has its weight -.

a. increased b. decreased

11. _______ doesn't change with changes in gravity.

a. mass b. weight

12. The _______ mass an object has, the more that object weighs.

a. more b. less

13. On Earth gravity exerts a(n} ______ force on your body.

a. upward b. downward

Write answers to the following questions on the blank lines provided.

1. What is gravity?

________________________________________________________________________

2. What are two things that the amount of gravitational force between two objects depends on?

________________________________________________________________________

3. Why does Earth exert a stronger gravitational force than the moon?

________________________________________________________________________

4. If an object weighs 40 N on Earth, would it weigh more than 40 N on the moon? Explain

________________________________________________________________________

5. If an object has a mass of 26g on Earth, would its mass be less than 26g on the moon? Explain.

________________________________________________________________________

Circle the picture in each set below that shows the greater gravitational force between the two objects.