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

Which planet is said to be in the 'Goldilocks zone' of the solar system?

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

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

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

What distinguishes Earth from other planets in our Solar System?

There are four terrestrial planets. They are:

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

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

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

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

What is the smallest planet in our Solar System?

Which nation launched the first space station?