sentences: moisture is a kind of environmental factor & coolness is a mean of environmental expand ->  warmth and moisture are kinds of environmental factors  warmth and moisture are kinds of environmental factors & coolness and dry can accelerate physical size -> a warm and moist environment can accelerate chemical reactions a warm and moist environment can accelerate chemical reactions  a warm and moist jet can accelerate physical 40 & chemical weathering means chemical reaction causes the weathering of rocks -> a warm and moist environment can accelerate the rate of chemical weathering on rocks