Science Worksheet - Grade 9 Board: ACARA Topic(s): CARBON CYCLE Total Marks: 20 Time: 20 minutes Name: ____________________ Class: _______ Date: ___________ INSTRUCTIONS Choose the best option for each MCQ Answer all questions Write neatly and legibly Multiple Choice Questions What is the primary form of carbon found in the Earth’s atmosphere? a) Carbon monoxide b) Carbon dioxide c) Methane d) Carbonic acid Which process removes carbon dioxide from the atmosphere? a) Respiration b) Combustion c) Photosynthesis d) Decomposition How do animals obtain carbon? a) By breathing it in from the atmosphere b) By absorbing it through their skin c) By consuming plants or other animals d) By drinking water containing dissolved carbon What is the main role of decomposers in the carbon cycle? a) To produce carbon dioxide through photosynthesis b) To convert atmospheric carbon into fossil fuels c) To break down dead organic matter, returning carbon to the soil and atmosphere d) To store carbon in the...