THE EARTH

The Earth is our ____________________ planet .
It is the ____________________ planet from the Sun .
It is the ____________________ - largest planet in the Solar System .
It is a sphere , but it is slightly flattened at the ____________________ .
It has a solid ____________________ with mountains , valleys , plains , etc .
It is the only known planet with large amounts of liquid ____________________ .
It is the only planet known to support ____________________ .

Life on Earth
The Earth is the only planet in the Solar System with the conditions for ____________________ to exist . These conditions are :
The ____________________ from the Sun is just right for water to remain in a liquid state . The ____________________ is not too hot and not too cold .
Liquid ____________________ is essential for all life on Earth .
It covers more than 70% of the Earth's surface . Most of it is salt water in the ____________________ .
The ____________________ is the layer of gases that surrounds the Earth . It keeps the Earth's surface at a comfortable temperature . It contains the ____________________ that we breathe .

Movements of the Earth
The Earth moves in two different ways .
It spins on its ____________________ and it travels around the ____________________ .

Rotation
The Earth spins or rotates on its own ____________________ .
The Earth takes one ____________________ ( about 24 hours ) to complete one spin .
Day and night are caused by the Earth's ____________________ .
? It is ____________________ on the side of the Earth that faces the Sun .
? It is ____________________ - time on the side that faces away from the Su n

Revolution
The Earth orbits or revolves around the ____________________ .
The Earth takes one ____________________ ( about 365 days ) to complete one ____________________ around the Sun .
____________________ occur because the Earth's axis is tilted and it always points in the same direction .
? In ____________________ , the Northern Hemisphere is tilted away from the Sun .
? In ____________________ , the Northern Hemisphere is tilted towards the Su n