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What are planets made of and why? By Madeleine by Mind Map: What are planets
made of and why? 
     By Madeleine
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What are planets made of and why? By Madeleine

What planets make up the rocky planets?

Rocky planets

Mars

Mercury

Venus

Earth

Pluto

Are any two planets the same?

Yes

Gas planets are the same in some ways such as they all have gas.  Rocky planets are the same, they are the same in some ways, such as: they are very heavy and move slowly, they also have very few moons.

No

Planets are different in some ways, eg: they are placed in different areas of the galaxy, how fast they move, and what exact size they are.

How do scientists discover what planets are made of?

The simplest thing to do would be to get a piece of the planet and study it, but in reality this doesn't happen very often. Scientists have got bits of the moon, Mars and the astroid belt, as they have fallen to Earth as meteors and meteorites.  But what about the other planets. So here are some other ways.

Studying

Did you know that you can discover what  planets are made of by studying the reflections of the planets surfaces.

Reflections

planets

spacecrafts

Spacecrafts have been sent into space, they have either orbited or sent astronauts into space.

Astronauts

Orbiting

Tools

Tools like, scientific instruments, Robots, and atmospheric bombs are used to try and discover what planets are made of.

Instrument, Bombs

Robots

What planets are in the group of gas giants?

Gas planets

Uranus

Jupiter

Neptune

Saturn

What is the size of planets?

Small planets

Small planets have a size less than 13000km.

Mars

Earth

Venus

Giant planets

Gas planets have a diameter of more than 48000.

Jupiter

Saturn

Uranus

Neptune

Lesser planets

The lesser planets are Pluto and Mercury.  These are referred to as lesser planets because they are so small.  There is a debate on whether Pluto should be a planet or not.

Pluto

Mercury

What is the structure of planets?

Gas planets

Jupiter

Neptune

Uranus

Saturn

Rocky planets

Earth

Mars

Venus

Mercury

Pluto

Why are planets spheres?

Gravity

Racing

Direction

Matter

MY RESOURCES

Please have a look at my resources and books. Press on the arrows and it will take you directly to the page I found my information.  Check it out!!! I might have missed out some information.

Intronet

wiki.answers.com

dynamicearth

kids.nineplanets

curios.astro.cornell

answers.askkids.com

Books

Mysteries of the univers