Part E Water can exist in three different states of matter: solid, liquid, and gas. The water molecules are the same in each state, but the distance between them changes as water changes state. Space your four molecules evenly on one sheet of paper. Now place the second sheet of paper next to the first sheet, so the long edges of the sheets are touching. Space your four molecules evenly over both sheets of paper. Compare the two models. Does this demonstration show how the distance between water molecules can change? Were the molecules more tightly-packed on one or two sheets of paper? Explain.

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weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

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above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.