1. D46 Convection Currents

2. D46 Convection Background
Scientists don’t really know how plates move.
One theory is that there are convection currents within the Earth’s mantle.
Convection is a circular movement of fluid caused by a temperature difference inside it.
The convection of magma in the mantle is believed to cause plate movement.

3. C46 Convection Question CHALLENGE QUESTION: copy and answer
How do differences in temperature cause a convection current (why does it happen)?

4. D46 Convection Analysis: Date____ Name_________________ Hour__
Copy and answer in complete sentences:
Imagine that hot magma is lying beneath some cooler magma. What do you predict will happen? Be specific and explain.
How do scientists believe plates move?