Lesson 33: Planets, Planets How Are You?

1. Types of planets

• Mercury

- It is too close to Sun.
- The temperature is too hot to support life

• Venus

- A great amount of the heat from the Sun is trapped in its    
  atmosphere.
- It is hotter than Mercury

• Earth

-It has water, air and a suitable temperature to support life.

• Mars

- Almost all of its water is frozen.
- Scientists have not found any life there.

• Jupiter

- It is so big that all the others planets could fit inside it.

• Saturn

- It has three wide rings
- There can be seen with a telescope

• Uranus

-Uranus is lying on its side as it goes round the Sun.

• Neptune

- It is covered with a blue ocean of liquid methane.

• Pluto 

- Pluto is very cold because it is very far from the Sun.


2. Inner planets-Mercury, Venus, Earth and Mars


- All these planets are made of rocks
- Each of the inner planet has an atmosphere and it    
  contains air  
  which suitable for living things to survive.
- The atmosphere of the other inner planets is very thin 
  and poisonous to living things.


3. Outer planets-Jupiter, Saturn, Uranus, Neptune  
    and Pluto


-   They are mainly made of gases. 
-   Their temperature is too cold to support life.