Dynamic Earth Review 1

In an earthquake, the L waves are second to arrive.

Which of the three earthquake waves cause the most destruction for human populations?

At what rates do tectonic plates move?

Which the earth's layers is the thinnest?

It is believed that at one stage, all the landmasses of the earth were joined together in one large supercontinent called Pangea. This supercontinent then broke into two smaller continents - one that drifted north and another that drifted south. What was the name given to the continent that drifted south?

What is the name given to the theory of how the continents of the earth cam to be where they are today?

If you were to look at the side of a rocky hill or mountain and saw three clearly defined layers of rock (e.g. were different colours or textures) which layer would you say is the newest layer of rock?

What is the name given to a wave or a series of waves in the ocean that is the result of an underwater earthquake and can cause widespread damage and destruction?

We can use present-day fossils and other geological evidence to make informed 'guesses' about what the earth looked like millions of years ago.

The shockwaves caused by an earthquake spread out in all directions.

There are three types of waves that are recorded on a seismogram. The order of arrival of these waves is:

The point on the Earth's surface directly above the focus is called the...

Which of the earth's layers is believed to be solid rock?

What causes tectonic plates to move?

What is molten rock that erupts onto the surface called?

When rocks in the earth's crust come under enormous sideways pressure, they can soften and bend slowly without breaking. When this happens, the rocks form FOLDS. The folds that bend downwards to form a U-shape are called____________. Those that bend upwards like a dome are called __________.

The magnitude of an earthquake is usually measured on the ___________ scale (from 0 to 10)

Starting with the centre of the Earth, what is the correct order for the layers of the Earth?

Earthquakes are recorded on instruments called Magnigraph.

The Ring of Fire is a ring of volcanoes that follow the boundary of which tectonic plate?

The mantle consists of very hot, semi-solid material called ___________. When this erupts from a volcano, it is called __________.

Which of the earth's layers is actually made up of two separate regions?