Time left 1 The islands of Seychelles are located in the Arctic Ocean Atlantic Ocean Indian Ocean Pacific Ocean 2 The island of Sri Lanka formerly known as Madagascar Tasmania Ceylon None of the above 3 The highest sand dunes are found is the Sahara desert the Atacama desert the Kalahari desert the Gobi desert 4 The greatest variety of animal and plant species is fund in temperate grasslands tropical moist forests tundra regions in hot deserts 5 The layer of the earth, immediately below the crust, is called outer core inner core inner mantle outer mantle 6 The highest mountains in Africa, which is not part of any mountains chain, is Mt. Aconcagua Mr. Kilimanjaro Mt. Kosciusco Mont Blanc 7 The heavier silicates named as 'Sima' or silica + magnesium are most abundant in the crust core mantle ocean floors 8 The length of the day is determined in astronomical units solar terms length of the hours None of the above