Module 4 Review:

There are two types of crust that make up plates. Which is more dense?

The two forces that help move plates are __

Which of the following is NOT evidence off the continents moving over time?

What is common at plate boundaries?

A deep sea trench occurs at what type of plate boundary?

___ explains HOW continents have moved over time.

In 1915, this scientist presented lots of evidence for the theory of continental drift

What type of plate boundary is found at the Mid-Atlantic Ridge?

Alternating __ in the ocean showed the ocean floor spreads out from mid-ocean ranges.

What technology helps scientists map the ocean floor by sending out pings?

Wegener proposed that all continents were joined at one time in a supercontinent called __.

What occurs as the plastic mantle flows from hotter less dense rock to cooler more dense rock?

The upper part of the Earth's mantle that can flow is called the __.

This layer of the crust is below the mantle and is made up of molten nickel and iron.

The two types of seismic waves that scientists use are __.

Which letter shows a deep sea trench?

Hot spots usually occur ___.