Chapter 7 The Solar System

Aside from Earth, which inner planet once had liquid water on its surface?

Most comets are found in the _______.

In a heliocentric system, Earth revolves around

What do the four outer planets have in common?

The planets that are closer to the sun than Earth are

What holds the solar system together?

Jupiter's Great Red Spot is a ________ larger than Earth.

Most ancient astronomers thought all celestial objects revolved around

The asteroid belt is located

Small asteroid-like bodies became the building blocks for the planet are called

Earth is thought to be at the center of the solar system in the ______ model.

What is distinctive about Jupiter?

The sun produces energy by

Copernicus further developed the _______ model.

Only planet that has a lower density than water

Mars's atmosphere is mostly

The gas giants are composed mainly of

All of the _______ planets have many moons.

A meteoroid that hits Earth's surface is called a

Saturn's rings are made up mostly of

The fuzzy outer layer of a comet's head is called a

Which is the smallest terrestrial planet?

Uranus is different from most other planets because it

What do all the inner planets have in common?

Neptune is very similar is size and color to

Meteoroids usually come from

Venus and Earth are much alike in terms of