Earth processes

Volcanic eruptions vary because of

Continental crust is typically __________________________ than oceanic crust

Where two tectonic plates crash together the boundary is called

In the scenario above what feature will most likely appear at the boudary of the two oceanic plates?

What type of rock is pictured?

What feature can be seen in the rock pictured

Who discovered the elliptical nature of planet's orbits around the Sun?

If another planet the same size as Earth was discovered 3 million km further away from the sun the force of gravity between that planet and the sun would be

The reason for your answer to #6 is

Describe two interactions between Earth's spheres depicted above. Remember to include the things, the actions and the spheres in your answer. Answer in complete sentences.