1) The most abundant gas on the earth’s atmosphere is a) Nitrogen b) Oxygen 2) The world's oldest trees are ____ years old. a) 4000 b) 4600 3) The major diet of pandas is a) Bamboo b) Acacia leaf 4) Which of the following is an endangered animal? a) Black Rhino b) Dolphin 5) What is the date of World Environment Day ? a) 22 April b) 5 June 6) The outermost layer of Earth’s atmosphere or the upper limit of the atmosphere is a) Exosphere b) Thermosphere 7) Which of the following materials can be recovered from the recycling of soft drink cans ? a) Paper b) Metal 8) ___coined the word 'ecology'. a) Albert Einstein b) Ernst Haeckel 9) The term environment has been derived from a French word '____' which means surrounding. a) Environ b) Environer 10) What are planktons? a) Plants living in water b) Very small plants and animals living in water

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