What was the average number of drops that you were able to place on the penny in the first three trials?

4. Keep track of the water drops as you add them, one at a time, until water runs over the edge of the penny. You'll probably be surprised by the number of drops you get on there!

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.

b. climate change will cause an increase in biodiversity of all ecosystems.

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