Unit 4 Life on Mars Unit 4 Life on Mars Reading Reading Moving to Mars Moving to Mars crowded population polluted Earth a better place … crowded polluted What should we do Move to another . What is life on Mars like? Imagine v. Imaginative adj. (s) spacecraft a long journey at the speed of light oxygen gravity float Is life on Mars always better than Is life on Mars always better than life on Earth today? life on Earth today? Listen and answer Listen and answer
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