Plate tectonics

The outer layer of the earth is called...

• The mantle

• The crust

• The inner core

• The outer core

The Nazca and South American plates are

• moving past each other

• hitting off each other

• separating from each other

• hitting off each other but the edge of one plate slips under the other

What is the Mid-Atlantic Ridge

• A tear in the Earth found under the Atlantic ocean

• A tear in the Earth found under the Pacific Ocean

• A tear in the Earth found under the Arctic Ocean

• A tear in the Earth found under the Indian Ocean

The hottest part of the earth is

• the crust

• the mantle

• the outer core

• the inner core

How hot is it?

• 30-60 degrees

• 1000-2000 degrees

• 3000-5000 degrees

• 1500-2500 degrees

Why is the distribution of volcanoes and earthquakes similar?

• They occur on plates

• They happen at conservative plate boundaries

• They occur on plate margins

What builds in the magma chamber to begin a volcanic eruption

• Pressure

• Pressure and gasses

• Pressure and air

• Air and gasses

What is the top of the volcano called?

• Vent

• Magma Chamber

• Crater

• Layers of rock

Name four gases that are emitted during an eruption?

• Water vapour, O2, Nitrogen, CO2

• CO2, O2, Water Vapour, Methane

• CO2, Water Vapour, Sulphur Dioxide, Hydrogen Sulphide