1) How many percent of the world's water is fresh? a) 3 b) 97 c) 5 d) 67 2) How many percent of the world is salt water? a) 3% b) 1% c) 70% d) 97% 3) What is the largest ocean in the world? a) Pacific b) Atlantic c) Indian d) Arctic 4) The process of removing salt from seawater is called_____________. a) filtration b) desalination c) purification d) distribution 5) How many oceans are there in the world? a) 3 b) 4 c) 5 d) 6 6) Used water is called... a) fresh water b) salt water c) sewage d) rain water 7) A long period of dry weather is called.... a) drought b) tsunami c) flood d) famine 8) True or False: East Africa experience a severe drought before. a) True b) False 9) The annual rainfall in a desert is less than how many millimetres? a) 350 b) 150 c) 250 d) 450 10) Camel's hump is for... a) storing water b) storing food c) storing blood 11) It is a place where the lands meet the ocean and sea. a) flood b) cliff c) coast d) road 12) A road passing round a town or its centre to provide an alternative route. a) roundabout b) bypass road c) highway 13) What does the word ‘saline’ mean? a) containing salt b) containing sugar c) containing acid 14) How many percent of the world is water? a) 97% b) 70% c) 30% 15) The worlds’ largest hot desert is the Sahara Desert in a) Asia b) South America c) Africa d) Europe 16) The plants in the rainforest produce about how many per cent of the oxygen in the Earth’s atmosphere? a) 10% b) 20% c) 30% d) 40% 17) True or False: Nomads have a permanent home or shelter. a) True b) False

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