Answers

2016-04-28T19:33:33+05:30
Day and night and seasons are the effects

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2016-04-28T21:08:24+05:30
Revolution : " The earth revolve around the sun " 

the two effects of revolution : 
1. It causes the season on earth 
2. The revolution helps in controlling and changing the temperature and even the sun's heat radiation on earth. 
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