How Water Beats Rock Grade Level: 1st - 5th; Type: Earth Science
Build a model to explore how water and ice can change the form
of rocks. - What is weathering? - How can water, frozen and
unfrozen, change rocks? - When water freezes in a rock, why does
it crack? Rocks are ever changing. They can be smoothed by
water, broken off by wind, and cracked by ice. If you found a
rock in your backyard then traveled back in time 1,000 years,
that rock would look totally different because of changes that
have occurred to it. One way that rocks change is when water
gets into small cracks and then freezes. When the water freezes,
it expands thus causing the rock to crack and even sometimes
bust open. - Wax paper - Dough mixture - Small balloon -
Carefully fill the balloon with water until it is the size of a
golf ball. Try to get all air out of the balloon before tying it
closed. - Spread out a piece of wax paper on the table. Use your
hand to flatten out a 2 inch ball of dough until it is about ¼
inch thick. - Place your