1. UNIT 2 REVIEW STUDY GUIDE

2. PLANETS IN ORDER FROM THE SUN
1. MERCURY
2. VENUS
3. EARTH
4. MARS
ASTROID BELT
5. JUPITER
6. SATURN
7. URANUS
8. NEPTUNE
9. PLUTO

3. Planets in order from smallest to biggest
1. Pluto – (Not technically a planet) .18 Earths – You could fit five Mercury’s in Earth
2. Mercury – .38 Earths – You could fit about 2.25 in Earth
3. Mars – .53 Earths – You could fit about 2 Mars in Earth
4. Venus – .95 Earths – Venus is about the same size as Earth
5. Earth –
6. Neptune – 3.8 Earths – You could fit about 4 Earths into Neptune
7. Uranus – 4.0 Earths – You could fit 4 Earths into Uranus
8. Saturn – 9.4 Earths – You could fit about 9.5 Earths in Saturn
9. Jupiter – 11.2 Earths – You could fit about Earths in Jupiter

4. Here is a picture of a scale of the planet sizes.

5. COMETS, ASTROIDS, METEORS, METEORITES
Which is which?

6. Comets
Comets – Object made of ice, gas, and dust that travels through space

7. Asteroid
Asteroid – A piece of rock that is in space and has not entered into the Earth’s atmosphere.

8. Meteors
- Meteors – A piece of rock that has entered into the Earth’s Atmosphere but it burns up before it hits the Earth. (shooting star)

9. Meteorite
Meteorite – meteor that strikes the Earth’s Surface