1 MATCH the photos to the course of the river. 2 What do we call a small river that flows into a larger river? TICK. source mouth tributary MIDDLE COURSE LOWER COURSE UPPER COURSE F I F T E E N · 15 OBSERVE and COLOUR. What can you see in this river? » What can we do to keep rivers clean? TELL your classmates. BE A SCIENTIST! BOTTLES FISH PLASTIC BAGS FOOD CONTAINERS DON'T DROP LITTER! 1
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