Download • Worksheet #2

• Worksheet #2
1. Gravity is the force of attraction that all objects hold toward each other.
Everything in the universe has gravity. If gravity is the only force acting on an
object, all objects fall at the same rate.
2. Weight is a measure of gravitational force. An astronaut on earth may weigh
180 pounds but on the moon his weight is only 30 pounds.
3. Mass is considered the amount of matter in an object. Scientists think of it as
the measure of an object's inertia or resistance to motion.
4. The moon has less mass than the earth and, therefore, has less gravitational
pull. In fact the moon's gravity is only 1/6th as strong as the earth's gravity.
5. On earth air affects falling objects. In a vacuum everything would fall at the
same rate of speed, as there would be no air resistance, Objects may fall more
slowly than others, depending on the relationship of their surface area to their
mass if they are not in a vacuum.
6. A vacuum is a place that has no oxygen or other gases. It is emptiness.
7. The strength of gravity depends on the mass of an object and how close it is to
another object.
8. Albert Einstein developed the idea of warped space to explain why gravity
exists.