Why the earth is called the blue planet?ORWhy earth is called the watery planet?
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The earth is called the blue planet or watery planet because abundance of water on the earth gives it a vivid blue colour when viewed from space.
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Why is the earth a unique planet?
What is the surface of the earth made up of?
Name a planet that cannot support life. Give reasons for your answer.
State three factors that have made life possible on the planet earth.ORState the conditions favourable for life to exist on earth.