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Arrow-Puffin-3_Semester-1 Social 271The Earth - Our Home 1This is the picture of Earth.EARTHWe live on Planet Earth. It is one of the eight planets of the solar system.All the eight planets move around the sun.The Earth is made up of both land and water. There are many landforms on the surface of the Earth such as hills, mountains, plains, plateaus, forests and deserts. There are many water bodies on Earth such as oceans, rivers and lakes.The Earth is surrounded by a layer of air called the atmosphere. It is important for us to breathe. The Earth has water and air, hence it supports life.The blue part isThe brown part isUnderstand the landforms of the EarthKnow about the importance of atmosphereUnderstand the shape of the EarthUnderstand the meaning of horizon and coastLearning OutcomesWarm UpThree-fourths of the Earth%u2019s surface is water and one-fourth is land.FactHow many planets are there in our solar system?Which planet do we live on?Why is the atmosphere important for living beings?CheckpointThe Earth%u2019s axis is tilted at an angle of about 23.5 degrees, which causes the change in seasons as the Earth orbits the Sun.Fact