Structure and age of the Earth

Which of the Earth's layers is made of very hot liquid metal?

• crust

• mantle

• outer core

• inner core

If you were to travel down the Earth at a steady speed, which layer would you likely spend time the most and why?

• crust because it is the thinnest layer

• crust because it is the thickest layer

• mantle because it is the thickest layer

• mantle because it is the thinnest layer

What are the element symbols of the two metals that makes the Earth's core?

• Ir, N

• Fe, N

• Fe, Ni

• Ir, Ni

What is the idea of continental drift all about?

• This idea states that the continents are continously moving over millions of years.

• This idea states that the continents were once joined and now they have stopped moving.

• This idea states that the continents have started moving in 1912.

• This idea states that the continents are moving because they are attracted to each other.

One evidence of continental drift is that different continents have matching fossil records.

• True

• False

The idea of tectonic plates was proposed first. Later it was supported by the idea of continental drift.

• True

• False

Alfred Wegener proposed the idea of continental drift.

• True

• False

Alfred Wegener proposed the theory of plate tectonics.

• True

• False

On average, the continents are moving a few meters per year.

• True

• False

Alfred Wegener noticed one of the pattern of continents as shown. How did he describe this pattern?

• The continents are resting on top of tectonic plates.

• The types of the rocks on the different continents are similar.

• The fossils on the different continents match each other.

• The shapes of the continents fit together.