関連ワード:  what is air temperature class 9    what is room temperature class 9    what is room temperature in chemistry class 9    what is the normal room temperature class 9    what is room temperature in physics class 9    what is the speed of sound in air at room temperature class 9    define temperature class 9    what do you mean by weather class 9    what do you mean by climate class 9    what is weather class 9