C - The Earth's Structure

Question 1

Name the 4 layers of the earths structure and the order they occur in…

Answer 1

Crust, mantle, outer core, inner core

Question 2

What’s the layer that we live on?

Answer 2

The crust

Question 3

The crust is very _____ and varies between __ and ___ km deep

Answer 3

Thin

5 and 50

Question 4

The mantle flows very ______

Answer 4

Slowly

Question 5

How does the mantle slowly move?

Answer 5

Radioactive decay produces lots of heat which causes the mantle to flow in convection currents

Question 6

What two elements is the core made from?

Answer 6

Iron and nickel

Question 7

The earths surface is made up of __________ ______

Answer 7

Tectonic plates

Question 8

Convection currents in the mantle cause the tectonic plates to ______

Answer 8

Drift

Question 9

Most of the plates on the earths structure are moving a few ___ a year

Answer 9

CM

Question 10

Occasionally, the tectonic plates more very suddenly, causing an _________

Answer 10

Earthquake

Question 11

Volcanoes and earthquakes often occur at the ________

Answer 11

Boundaries of a tectonic plate

Question 12

Scientists can/can’t predict earthquakes

Answer 12

Can’t