atlas — (noun) a book of maps · human — (noun) a person · hill — (noun) a raised area of land, smaller than a mountain · river — (noun) a long line of water that flows across the land · desert — (noun) a dry place with very little rain · dry — (adjective) having no or little water

upper course — (noun) the start of a river, high up in the hills or mountains · middle course — (noun) the part of a river that flows more gently through valleys · lower course — (noun) the end part of a river, close to the sea · tributary — (noun) a smaller river that joins a bigger one · estuary — (noun) where a river meets the sea and mixes with salty water · meander — (noun) a bend or curve in a river

biomes — (noun) large areas with similar weather, plants and animals, like rainforests or deserts · climate zones — (noun) parts of the world with similar weather, like hot or cold areas · vegetation belt — (noun) a strip of land with the same kinds of plants · volcanoes — (noun) mountains that can explode with lava, gas and ash · magma — (noun) hot, melted rock under the ground · ash — (noun) grey powder made when something burns