Unit 2 The Earth

What are the four main spheres of our planet?

• The hydrosphere, atmosphere, geosphere and biosphere.

• The atmosphere, mesosphere, stratosphere and biosphere

• The biospehere, geosphere, ecosphere and exosphere.

• The stratosphere, troposhere, mesosphere and thermosphere.

What is the hydrosphere?

• It is all the water on the Earth. Oceans, rivers, lakes, glaciers and clouds.

• It is the layer of gases that surround the Earth.

• It is all the rocks and land that make up the Earth. It forms continents and landforms.

• It includes every living organism on the Earth.

What is the atmosphere?

• It is the layer of gases that surround the Earth.

• It is all the rocks and land that make up the Earth. It forms the continents and landforms.

• It is all the water on the Earth. Oceans, rivers, lakes, glaciers and clouds.

• It includes every living organism on the Earth.

What is the geosphere?

• It is all the rocks and land that make up the Earth. It forms the continents and landforms.

• It is all the water on the Earth. Oceans, rivers, lakes, glaciers and clouds.

• It is the layer of gases that surround the Earth.

• It includes every living organism.

What is the biosphere?

• It includes every living organism on the Earth.

• It is all the water on the Earth. We can find water in oceans, rivers, lakes, glaciers and clouds.

• It is the layer of gases that surround the Earth.

• It is all the rocks and land that make up the Earth. It forms the continents and landforms.

How many layers does the atmosphere have?

• Five layers: troposphere, stratosphere, mesosphere, thermosphere, and exosphere.

• Four layers: biosphere, hydrosphere, geosphere and the atmosphere.

• Three layers: stratosphere, mesosphere and exosphere.

• Three layers: hydrosphere, geosphere, and biosphere.

What is the troposphere?

• It contains the air and oxygen we breathe. This is where atmospheric phenomena occur. Clouds, rain and wind are in this layer.

• It contains the ozone layer. This layer protects us from the harmful rays of the Sun. Aeroplanes fly here.

• It protects life on the Earth from meteors and asteroids.

• It is home to the International Space Station that orbits the Earth.

What is the stratosphere?

• It is home to the International Space Station that orbits the Earth.

• It contains the ozone layer. This layer protects us from the harmful rays of the Sun. Aeroplanes fly here.

• It contains the air and oxygen we breathe. This is where atmospheric phenomena occur. Clouds, rain and wind are in this layer.

• It separates the rest of our atmosphere from outer space. Many artificial satellites orbit the Earth here.

What is the mesosphere?

• It separates the rest of our atmosphere from outer space. Many artificial satellites orbit the Earth here.

• It protects life on the Earth from meteors and asteroids.

• It contains the ozone layer. This layer protects us from the harmful rays of the Sun. Aeroplanes fly here.

• It contains the air and oxygen we breathe. This is where atmospheric phenomena occur. Clouds, rain and wind are in this layer.

What is the thermosphere?

• It contains the air and oxygen we breathe. This is where atmospheric phenomena occur. Clouds, rain and wind are in this layer.

• It is home to the International Space Station that orbits the Earth.

• It separates the rest of our atmosphere from outer space. Many artificial satellites orbit the Earth here.

• It contains the ozone layer. This layer protects us from the harmful rays of the Sun. Aeroplanes fly here.