Alexis knows that different forms of water can affect erosion differently. She wants to build a model to compare different forms
of water. How could she build a model to compare how different forms of water cause erosion on a hill?
1. Obtain two identical containers and dry sand.
2. Shape equal amounts of sand into a
(A) slope on the side of each container
(B) flat layer in each container
3. Spray water on the sand in one container. The sprayed water represents
(A) a flowing river
(B) ocean waves
(C) rainfall
4. In the other container,
(A) do not add water. this represents the lack of water erosion
(B) place ice cubes to melt on the sand. this represents snow or glaciers
Sweating helps cool down the body. Water is released through glands in the skin, evaporates off the skin and the body is cooled. During exercise, muscles heat up more, so more sweat is needed.
