Gravity

First name

Last Name

Class Period

• 1st
• 4th
• 5th
• 6th
• 8th

The main reason the moon remains in orbit around the Earth is because of the force of -

• Earth's rotation
• the moon's rotation
• Earth's gravity
• the sun's gravity

The main reason the Earth remains in orbit around the Sun is because of the force of -

• Earth's rotation
• the moon's rotation
• Earth's gravity
• the sun's gravity

True or False. Planets have measurable properties, such as size, mass, density, and composition. A planet's distance and mass determines its gravitational pull.

• True
• False

True or False. A planet's mass and size does not determines how strong its gravitational pull is.

• True
• False

True or False. When gravity and inertia are added together, over and over again, the resulting motion is the nearly circular orbit of the Earth around the Sun.

• True
• False

A student is trying to explain how the Earth stays on a path around the sun. The hand is the sun, the ball is the Earth, and the path of the ball is the circular motion. The student explains that this path is the result of -

• the magnetic attraction between Earth and the sun
• potential energy stored in Earth that originated in the sun
• the gravitational attraction between the sun and Earth
• electromagnetic energy from the sun pulling on Earth

What keeps planets in the solar system from moving in straight lines through the galaxy?

• light energy
• gravity
• inertia
• potential energy