1. Which force was the first to be discovered? A. Gravity B. Weak nuclear forces C. Strong nuclear forces D. Electromagnetic force
2. What two qualities of objects does gravity depend on?
A. What each object is made up of and the distance between them
B. What each object is made up of and the material between them C. Each object’s mass and shape
D. The mass of objects and the distance between them
3. An asteroid flies close to the Earth. Gravity–
A. repels the asteroid away from Earth.
B. attracts the asteroid and Earth to each other.
C. makes the asteroid spin rapidly. D. causes the asteroid to explode.
Gravitational Forces (C)
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