Looking at geysers

This task is about geysers and how they work.
Look at the animation of a geyser.

animation of a geyser

Question Change answer

a)  Use the Aa tool below to label the four boxes on the diagram:
magma | underground water | rock layer | steam and hot water

Question 2Change answer

b)  What heats the water? 

Question 2Change answer

c)  As the water heats up it will take up more  and
     this increases the pressure and causes the water to come out as steam.
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