4th Quarter Review

Meteors or rock fragments burn up in this layer of atmosphere

• Spread out

• Aurora Borealis

• 50km to 80 km

• Mesosphere

Space shuttles fly in this area and it is also where the auroras are found.

• Thermosphere

• Exosphere

• Stratosphere

• Meso

This layer of air that extends to about 50 km from Earth’s surface.

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

The upper limit of our atmosphere

• Troposphere

• Thermosphere

• Exosphere

• Mesosphere

This layer is the closest to the Earth’s surface.

• Troposphere

•  Stratosphere

• Mesosphere

• Thermosphere

 It is any material that human gathers from nature to be used for his needs and to improve

• Natural Resources     

• Pesticide         

• Light Source

• Fossil Fuels

The topmost layer of the earth and is a mixture of different materials such as minerals

• Soil

•  Rock

•  Fuel

• Gas

They are used as different sources of energy like electricity and fuel.

• Rock   

• Fossil Fuel      

•  Distance

• Water

Fossil fuels came from the remains of dead organisms called ______.

• Rock   

• Gas     

•  Fossils

• Soil

_______ are resources which can be replaced over a short period of time

• Air      

• Renewable     

• Non- Renewable

• Natural