The Earth has land.  We live on land.  Land has soil and rock.  Grass, plants and tress grow on land.  Many animals live on land.

The Earth has continents.  Continents are made of land.  The Earth has 7 continents.  Oceans are between continents.

The Earth has water.  Oceans, lakes, and rivers are made of water.  Water is a liquid.  Many animals live in water.  Fish, dolphins and whales live in water.

An ocean is made of water.  An ocean is very, very big!  Some plants and animals live in an ocean.  Some fish, dolphins and whales live in oceans.

A lake is made of water.  Lakes can be smaller or very big.  Many fish and some plants live in lakes.  

A river is made of water.  Many plants and fish live in a river.  It can rain and snow on mountains  Rivers move water from mountains to lakes and oceans.

Air is a gas.  We cannot see air.  We breathe air.  Some animals can fly in air.  Birds can fly in air.

The atmosphere is made of gas.  The atmosphere is all around the Earth.  Outer space does not have an atmopshere.