What are planets made of and why? By Madeleine

1. Are any two planets the same?

1.1. Yes

1.2. No

2. How do scientists discover what planets are made of?

2.1. Studying

2.1.1. Reflections

2.1.2. planets

2.2. spacecrafts

2.2.1. Astronauts

2.2.2. Orbiting

2.3. Tools

2.3.1. Instrument

2.3.1.1. Bombs

2.3.2. Robots

3. What is the structure of planets?

3.1. Gas planets

3.1.1. Jupiter

3.1.2. Neptune

3.1.3. Uranus

3.1.4. Saturn

3.2. Rocky planets

3.2.1. Earth

3.2.2. Mars

3.2.3. Venus

3.2.4. Mercury

3.2.5. Pluto

4. Why are planets spheres?

4.1. Gravity

4.1.1. Racing

4.1.2. Direction

4.1.3. Matter

5. MY RESOURCES

5.1. Intronet

5.1.1. wiki.answers.com

5.1.2. dynamicearth

5.1.3. kids.nineplanets

5.1.4. curios.astro.cornell

5.1.5. answers.askkids.com

5.2. Books

5.2.1. Mysteries of the univers

6. What planets make up the rocky planets?

6.1. Rocky planets

6.1.1. Mars

6.1.2. Mercury

6.1.3. Venus

6.1.4. Earth

6.1.5. Pluto

7. What planets are in the group of gas giants?

7.1. Gas planets

7.1.1. Uranus

7.1.2. Jupiter

7.1.3. Neptune

7.1.4. Saturn

8. What is the size of planets?

8.1. Small planets

8.1.1. Mars

8.1.2. Earth

8.1.3. Venus

8.2. Giant planets

8.2.1. Jupiter

8.2.2. Saturn

8.2.3. Uranus

8.2.4. Neptune

8.3. Lesser planets

8.3.1. Pluto

8.3.2. Mercury