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You will work with 4 characteristics which are used to help identify rocks. You have to click the arrows to choose a rock. Then you have to put it into the tester and click the four levels to test the rock and see:
1.- if it wear well (if it is not easily damage)
2.- if it is permeable (if water penetrates into its pores)
3.- if it splits (if it breaks easily)
4.- if it floats (if it doesn´t sink to the bottom of the jar)
You can also click on the magnifying glass to find out more about the rocks and click the speaker to hear the words read aloud.
EXERCISES:
1.- Place each rock into the tester and click each levers.
2.- Which rocks wear well?
3.- Which rocks are permeable?
4.- Which rocks splits?
5.- Which rocks floats?
6.- Chose your favourite rock and write what is it commonly used for.