1) Which nutrient plays an essential role in muscle-building? a) Protein b) Carbohydrate c) Iron d) Fat 2) Which system of the body controls the senses? a) Circulatory system b)  Digestive system c) Nervous system d) Skeletal system 3) Which is the seventh planet to the sun? a) Venus b) Mars c) Uranus d) Earth 4) Where do most of the world's people live? a) Africa b) Asia c) South America 5) Sweet potato is an example of a modified _____. a) Leaf b) Root c) Stem d) Branch 6) Earthquakes are caused due to movements of tectonic plates. a) True b) False 7) A light year is... a) An one-year holiday b) The distance light travels in one year c) The age of the sun d) Goodyear tyres made for space shuttles 8) Arrange in order from most complex to simplest: gorilla, human, frog, crocodile a) gorilla, human, frog, crocodile b) human, crocodile, gorilla, frog c) frog, crocodile, gorilla, human d) human, gorilla, crocodile, frog 9) Which diagram represent a mode of a liquid? a) b) c) 10) What are landforms? a) A deep gorge with steep sides formed by moving water b) Breaking rock into small pieces c) A triangle shaped landform at the mouth of a river d) Features on the Earth's surface

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