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Arrow-Puffin-3_Semester-1 Social 2754. People in the past thought that the Earth was . (a) flat (b) round (c) oval5. The Earth is surrounded by a layer of . (a) land (b) air (c) waterB. Fill in the blanks.1. The Earth is a .2. All the planets revolve around the .3. The Earth is made up of and .4. The shape of the Earth is .5. The point where the land and the sea appear to meet is called the .C. Write %u2018T%u2019 for true and %u2018F%u2019 for false statements.1. The Earth has diverse landforms.2. Air is important for us to breathe.3. The Earth has more land than water.4. Magellan and his sailors reached the same place after three years.5. The Earth and the sky never meet.Knowledge ApplicationA. Write the names of these landforms.