I. Direction: Read the Questions carefully and encircle the letter of the correct answer

5. How are Gravity and Friction classified?
a. Motion
b. Inertia
c. Forces
d. Masses
6. What is the force of gravity on the moon
a. Twice the force of gravity on Earth
b. One-Sixth the force of gravity on Earth
c. One-Third the force of gravity on Earth
d. One-Twentieth the force of gravity on Earth
7. Which of the following describes the force that holds planets in their orbits?
a. Gravity
b. Friction
c. Rotation
d. Revolution
8. Which of the following increases friction
a. More speed
b. Rough surfaces
c. Smooth surfaces
d. more surface area
9. A pencil falls of the desk. What moves the pencil towards the floor?
a. Mass
b. Friction
c. Gravity
d. Speed
10. Why does astronaut on the Moon weigh one-sixth of his weight on Earth?
a. The astronaut has less mass on the Moon
b. There is no force of gravity on the Moon
c. The force of gravity on the moon is one-sixth that force of gravity on Earth
d. There is no atmosphere on the Moon

For numbers 11-15, Write T if the statement is true and F if the statement is false. Write your answer on the line before the number.
_______1. The Moon has no gravity
_______2. If Earth had more mass, its gravity would be stronger and we would have trouble moving around.
_______3. Gravity is a contact force
_______4. A guava fruit hanging on a tree exerts a downward force due to Gravity.
_______5. Gravity is a force that pulls objects toward each other.