an area of sand or small stones near the sea
beach
an area, often covered with sand or rocks, where there is very little rain and not many plants
desert
a thick layer of ice that permanently covers an area of land
ice cap
a piece of land completely surrounded by water
island
a large area of water surrounded by land and not connected to the sea except by rivers or streams
lake
a very high hill
mountain
an area of lower land between two lines of hills or mountains, usually with a river flowing through it
valley
a natural and continuous flow of water in a long line across a country into the sea
river
a long period of dry weather when there is not enough water for plants and animals to live
drought
a very large amount of water that covers an area that is usually dry
flood
a layer of gases in the sky that prevents harmful radiation from the sun from reaching the Earth
ozone layer
to put used objects or materials through a special process so that they can be used again
recycle
