Earth and atmosphere

The mesosphere helps protect the crust from...

• The impact of meteors.

• Dangerous cosmic rays.

• Dangerous solar flares.

• Harmful weather.

The composition of the atmosphere is mostly...

• Hydrogen

• Oxygen

• Nitrogen

• Helium

Which pie chart correctly shows the percentages of elements in the air?

• a
• b
• c
• d

Where you will find the ozone layer.

• stratosphere
• thermosphere
• exosphere
• mesosphere

Where we live.

• stratosphere
• thermosphere
• troposphere
• mesosphere

What is the function of the ozone layer?

• to allow UV rays to get to Earth
• to block UV rays from getting to Earth
• To keep oxygen in
• to allow meteors to get to Earth

What does layer D show?

• upper mantle

• lower mantle

• outer core

• inner core

Which of the following correctly lists the layers from innermost to outermost?

• inner core, outer core, lower mantle, upper mantle, crust

• lower mantle, upper mantle, crust, inner core, outer core

• lower mantle, inner core, upper mantle, outer core, crust

• crust, inner core, lower mantle, upper mantle, outer core

What layer is a shell of liquid iron nickel that creates the Earth's magnetic field?

• Outer Core

• Mantle

• Crust

• Inner Core

What layer is the thinnest outer layer of the Earth and is made of minerals that make up the rock we stand on?

• Outer Core

• Crust

• Mantle

• Core