Science Review - Objects in our Solar System

Who first discovered that the Earth, and all other planets, revolve around the Sun?

A ___ becomes a ___ when it enters Earth's atmosphere.

A _____ is an object that orbits a star, has a round shape, and does not have a debris field.

What factors influence the strength of attraction (gravity) between two objects?

What is an astronomical unit?

_____ describe how the planets move and behave.

In ancient times, people believed that all objects in the Universe revolved around the Earth. This was called the...

Which nation launched the first space station?

What was the first human-made object to travel outside our Solar System?

A small, rocky object that orbits the Sun (mostly between Mars and Jupiter).

A small, icy object that develops a glowing tail as it nears the Sun.

A planet that is made of lighter elements which are gasses is a...

A planet with a solid, inner core is...

The __________ is made of several parts: the sun, eight planets, and numerous smaller objects that orbit the Sun.

What is the smallest planet in our Solar System?

What distinguishes Earth from other planets in our Solar System?

Which planet is considered to be Earth's "twin" due to their similar size?

There are four terrestrial planets. They are:

Which two telescopes are considered 'optical'?

Smaller, planet-like objects, sometimes called protoplanets, with debris fields are called...