1) what is the meaning of bio's ? a) range  b) Life  c) source  2) what is the average thickness of lithosphere ? a) 300 km  b) 600 km  c) 100 km  d) 200 km  3) atmosphere prevent us from __________ a) gases  b) rays  c) cold  d) sun's harmful rays  4) where do lithosphere , atmosphere , hydrosphere meet ? a) narrow zone  b) ozone layer  5) fresh water is available on land through ______________ a) ground water  b) from pipes  c) water cycle  6) water found in three states are __________, ___________, __________] a) solid , liquid , gas b) gas , oxygen , carbon  c) solid , liquid , oxygen 

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