What does the ancient earthquake detector do? it help tell the direction of where it came from and the slightest movement will make the ball fall if you are referring to the ancient china one Edit
Depending on the type of lava flow, the resulting rocks look very different. This was a pahoehoe flow. A lava flow is caused by a volcanic eruption. The lava can flow down the volcano at speeds ranging from 1/24 to 50 meters an hour. They can be 1,300 degrees fahrenheit or more. They are very destructive.
Best Answer: pressure and magma If there is lots of pressure in the volcano there will be a big explosion. Vice Versa If the magma has a high solidity (more rocks in it) the explosivenes will increase due to gas bubbles formed in the magma. Runny (more liquid in it) lava will not have an explosion but just flow.Source(s): EÅ§IEÐ¸Ð¸E Â· 7 years ago.ice Versa If the magma has a high solidity (more rocks in it) the explosivenes will increase due to gas bubbles formed in the magma. Runny (more liquid in it) lava will not have an explosion but just flow. Source(s): EÅ§IEÐ¸Ð¸E Â· 7 years ago.