Intorucing The Solar System

Question 0

2. Astronomical Unit

Answer 0

a unit of distance equal to the

average distance between Earth and the sun, about 150 million kilometers.

Question 1

1. Solar System

Answer 1

the system consisting of the sun and the

planets and other objects that revolve around it.

Question 2

3. Planet

Answer 2

must be round, orbit the sun, and have cleared
out the region of the solar system along its orbit (this means it does not share the area of its orbit with any other objects).

Question 3

4. Dwarf Planets

Answer 3

an object that orbits the sun and has
enough gravity to be spherical, but has not cleared the area of its orbit (this means other objects also share its orbit).

Question 4

5. Asteroids

Answer 4

Small, mostly rocky bodies that orbit the sun.

Question 5

6. Comets

Answer 5

loose balls of ice and rock that usually have very long, narrow orbits.

Question 6

7. Planetesimal

Answer 6

one of the small asteroid-like bodies that formed the building blocks of the planets.