Uni 1

Question 1

What is a natural satellite?

Answer 1

Natural satellite: A celestial body that orbits another larger body

Question 2

What causes Earth’s seasons?

Answer 2

The tilt of the Earth’s axis. As it spins, at different times of the year, different parts of the Earth get more direct sun.

Question 3

Name the four main layers of the Earth

Answer 3

Crust
Mantle
Outer core
Inner core

Question 4

Name the three main tectonic plate boundaries

Answer 4

• Divergent
• Convergent
  -Transform

Question 5

Describe why tectonic plates are always moving.

Answer 5

Because of rising and falling heat in the Earth’s mantle (denser, cool air sinks; warmer, less dense air rises).
This is called convection currents -they are movements deep within the Earth.

Question 6

What plate boundary can form “Mid-Ocean Ridges”?

Answer 6

Divergent plate boundaries can cause mid-ocean ridges to form.

Question 7

What causes earthquakes?

Answer 7

Sometimes, tectonic plates don’t move smoothly past each other - they get stuck. Pressure builds up. When they get “unstuck”, pressure is released, causing
shaking/vibrations.