1) The __________ is approximately 150 million kilometers away from Earth. a) Sun b) Venus c) Jupiter 2) ____________________ protects the Earth's inhabitants from the Sun's radiation. a) The ozone layer b) Nitrogen c) Carbon dioxide 3) Water is the __________ surface to cover the Earth. a) largest b) tiniest 4) Earth is the __________ from the Sun. a) fourth b) first c) third 5) Earth is home to even the __________ living things. a) tiniest b) early c) sphere 6) The Earth is shaped like a __________. a) sphere b) semisphere c) cylinder

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