The surface of the land is not flat all over. There are many parts that dip down and many that reach up high. Flat areas of land are called plains. The smaller bumps are hills and the larger ones are mountains. The dips are valleys.
Sometimes the valleys are filled with water. Large Stretches of water that gather in wide valleys are called lakes. Other valleys have rivers flowing through them, carrying water from the land to the sea.
Plains, mountains, lakes and rivers can be shown on maps. They are shown as simple drawing called symbols. The blue line on a map in this atlas, You will know that a river runs through that part of the land. Here are some of the symbols we use in this atlas.
Sometimes the valleys are filled with water. Large Stretches of water that gather in wide valleys are called lakes. Other valleys have rivers flowing through them, carrying water from the land to the sea.
Plains, mountains, lakes and rivers can be shown on maps. They are shown as simple drawing called symbols. The blue line on a map in this atlas, You will know that a river runs through that part of the land. Here are some of the symbols we use in this atlas.
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