22.9: The Solar System- Challenge 2

1. ___ is the planet most similar to Earth in terms of size and overall mass.

Venus

2. Mercury makes about ___ revolutions around the Sun in the time Earth makes 10 revolutions.

40

3. On which planet would a person's weight be closest to their weight on Earth?

Venus

4. The time it takes a planet to make one complete orbit around the Sun is known as its ___.

orbital period

5. The planets' orbits are ___ in shape.

slightly elliptical

6. ___ discovered the relationship between a planet's orbital period and its distance from the Sun.

Johannes Kepler

7. ___ experiences the strongest gravitational attraction to the Sun.

Mercury

8. Order the following in terms of decreasing gravitational force: Earth, Moon, Sun

Sun, Earth, Moon

9. ___ is the planet that experiences the weakest gravitational attraction to the Sun.

Neptune