Chapter 21 Solar System Review

The outer layer of the solar system is called what?

Pluto is considered to be a _______ planet

Scientists have sent space probes to all of the planets

Why do objects of the solar system revolve around the Sun?

What is the study of the origin, development, distribution, and the future of life in the universe?

What is the order of the planets in the Solar System?

Which planet has the most rings?

As the Sun cooled and the planets formed, the planets further from the Sun formed as what?

On a long trip, what do spacecrafts carry to supply astronauts with oxygen?

The three main types of space probes are a flyby, a lander, and _____

How is power provided to the International Space Station?

Organisms on Earth receive energy from the Earth itself, The Sun, and numerous chemicals

An artificial satellite is a spacecraft that ________

While Earth rotates from west to east, objects in the sky appear to move in which direction?

What originates from the Oort Cloud beyond Pluto?

An astronomical unit (AU) is the distance between ______

Between a meteorite, a meteoroid, and a meteor, which of them is NOT an object in space?

Spacecrafts and spacesuits protect astronauts from ______

What are the solar system’s most dense materials?

People from over how many countries helped build the International Space Station?

Do all of the inner planets or outer planets have rings?

A space probe is a spacecraft that ______

What was the first artificial satellite to be placed into orbit? And what year was it?

Which planet has no true atmosphere?

Outer planets rotate more quickly than or slower than the inner planets.

Are space stations considered satillites or probes?