MCQOPTIONS
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| 1. |
Cold air is ______. |
| A. | lighter than warm air hence cold air settles down |
| B. | heavier than warm air hence cold air rises up |
| C. | lighter than warm air hence cold air rises up_x005F_x000D_ |
| D. | heavier than warm air hence cold air settles down_x005F_x000D_ |
| Answer» E. | |