1) The layers of air around a planet a) gases of air b) atmosphere c) clouds and sphere d) oxygen 2) The crumbling and rotting of an organic material a) spoiling b) rotting c) decay d) deteriorated e) preceding 3) slowly falling apart, is best defined as a) erosion b) gradual c) collapse d) crumbling 4) An asteroid strikes into the side of the moon, the asteroid made an _________ with the moon:   a) crash b) impact c) collision d) strike 5) Team USA was ______________ better than the team they faced in the event. a) much more b) encouraged c) noticeably d) influenced 6) The snow was beginning to melt, as it was ____________ from the sidewalk. a) water b) receding c) ice d) forming e) covered 7) The Wright brothers are known for the first flight, as their craft showed ____________ once in the air. a) speed b) wings c) flying d) flight e) stability 8) Many types of lettuce show multiple __________________ in color, taste and texture. a) variations b) colors c) types d) brands e) salads

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