1. Gravitation is the force of:
A. Attraction between masses
B. Repulsion between masses
C. Energy
D. Motion

2. The law of gravitation was given by:
A. Isaac Newton
B. Einstein
C. Galileo
D. Archimedes

3. Gravity keeps planets:
A. In orbit
B. Moving randomly
C. Stationary
D. Invisible

4. The force of gravity acts:
A. Between all masses
B. Only on Earth
C. Only in space
D. Only on liquids

5. Free fall occurs when:
A. Only gravity acts
B. Friction acts
C. Air acts
D. Force acts

6. Acceleration due to gravity is represented by:
A. g
B. v
C. s
D. m

7. Mass is:
A. Amount of matter
B. Force
C. Pressure
D. Speed

8. Weight is:
A. Gravitational force
B. Mass
C. Energy
D. Speed

9. Mass remains:
A. Constant
B. Variable
C. Zero
D. Negative

10. Weight depends on:
A. Gravity
B. Color
C. Temperature
D. Shape

11. Thrust is:
A. Force on surface
B. Speed
C. Pressure
D. Energy

12. Pressure equals:
A. Force per area
B. Force per time
C. Mass per area
D. Mass per time

13. Pressure increases when:
A. Area decreases
B. Area increases
C. Mass decreases
D. Speed decreases

14. Liquids exert pressure:
A. In all directions
B. Upward only
C. Downward only
D. Sideways only

15. Pressure increases with:
A. Depth
B. Height
C. Time
D. Speed

16. Upward force in liquid is:
A. Buoyant force
B. Friction
C. Gravity
D. Thrust

17. Buoyancy helps objects:
A. Float
B. Disappear
C. Move faster
D. Burn

18. Archimedes discovered:
A. Buoyancy principle
B. Gravity law
C. Motion law
D. Energy law

19. Floating occurs when:
A. Buoyant force greater than weight
B. Weight greater than buoyant force
C. Both equal
D. Both zero

20. Ships float due to:
A. Buoyancy
B. Gravity
C. Friction
D. Inertia