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The planet Earth

 

The Earth is a very special planet because it is the only planet that is able to support life, due to its uniques characteristics.

 

  • Its atmosphere contains oxygen and carbon dioxide that are essential gases of photosynthesis and respiration.

 

  • The temperature on its surface is about 15ºC, because of the distance from the Sun and the composition of the atmosphere.

 

  • Water exists as ice, liquid water and water vapour. It makes the water cycle possible.

 

  • The Earth has a magnetic field which protects the surface from solar radiation.

 

  • The Moon is a very large satellite that is responsible for tides.

 

  • It has geological activity (volcanos, earthquakes...)

ACTIVITIES

 

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1. Mark the characteristics that make the earth a habitable planet:

 

a. There is water in the three states of matter.

b. It is near the Sun.

c. Most of the planet is covered by water.

d. The atmosphere is rich in nitrogen.

e. There are night and day, and seasons.

f. The temperature is about 15ºC.

g. It is very big.

h. There is solar radiation that gives light and heat.

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