CYCLING OF MATTER PAGES How does matter cycle through an environment? • Matter moves between the living and nonliving parts of ecosystem • Unlike energy, which flows, matter cycles in ecosystems. Why is Carbon important? Carbon • Carbon is a part of all living things. • Carbon can be obtained by eating food • Some organisms get carbon from the atmosphere or water. • Fossil fuels, which are formed from decomposed organisms, also contain carbon. • CARBON DIOXIDE MOLECULECO2 Carbon is abundant in the air… …as carbon dioxide. Which is great news for plants. They can’t eat food, so they make their own sugar by photosynthesis. Photosynthesis: Plants take in water (H2O) from the soil through their roots. And carbon dioxide (CO2) from the air in through their leaves. Then they use sunlight energy to rearrange these into molecules of glucose (sugar). Some Whichglucose is greatisnews stored forby consumers, the as they can eat plants use theorenergy in plant as starch (e.g. and potatoes) thecellulose food to in move build as the and plant celltheir walls.bodies. photosynthesis Respiration: To move and grow, both plants and animals need to Plants and animals take in oxygen (O2) from the air. break down glucose to release that chemical energy. They use the oxygen to break down glucose, producing carbon They do this by respiration. dioxide (CO2) and water (H2O) as waste. feeding photosynthesis respiration feeding photosynthesis Some day, this goat will die… The carbon which is locked up in is great news for the body …which of organisms is not lost decomposers like bacteria and fungi. forever. They break down dead organisms and in doing so, release the carbon into the air as carbon dioxide (CO2). respiration feeding photosynthesis respiration feeding photosynthesis decomposition Millions of years ago, some decaying organisms were covered by layers of sand and rock. The pressure caused them to fossilise and form fossil fuels. respiration feeding photosynthesis decomposition We can extract these fossil fuels from underground and burn them to release energy. This process is called combustion. It releases carbon dioxide (CO2) into the atmosphere. respiration feeding photosynthesis decomposition The Carbon Cycle combustion respiration feeding photosynthesis decomposition Carbon Cycle • SOLVEACTIVITY SHEET1: USETHEWORDSAND PICTURESGIVEN TO YOU TO COMPLETETHE ACTIVITY SHEET. Fossil are burnt in • factories to give energy. This is Combustion 1. Photosynthesis 3. Respiration 2. feeding Animals and plants die and are decomposed . This is Decomposition and they turn into fossils AFLCheck: List the four main scientific processes in the carbon cycle Carbo n cycle DEMONTRATE YOUR LEARNING TRUE OR FALSE? IF THE BOX IS COLOURED IN GREEN IN THE NEXT SLIDE IT IS TRUE OR ELSE IF IT IS COLOURED RED IT IS FALSE Green plants use carbon dioxide in photosynthesis. TRUE OR FALSE? ANSWER Green plants use carbon dioxide in photosynthesis. TRUE OR FALSE? QUESTION Combustion removes carbon from the atmosphere. TRUE OR FALSE? Combustion removes carbon from the atmosphere. TRUE OR FALSE? Respiration adds carbon dioxide to the atmosphere. TRUE OR FALSE? Respiration adds carbon dioxide to the atmosphere. TRUE OR FALSE? Decomposers remove carbon dioxide from the atmosphere. TRUE OR FALSE? Increasing carbon dioxide may cause global warming. TRUE OR FALSE? Energy is transferred from plants to animals to decomposers. TRUE OR FALSE? --QUESTION The largest store of carbon is the atmosphere. Why is water important? Wate r Cycle Water Cycle The three stages in the water cycle: 1 Evaporation 2 Condensation 3 Precipitation Stage 1: Evaporation • Evaporation is the process during which liquid water changes into a gas called water vapor. • This water vapor rises into the atmosphere. Stage 2: Condensation • The higher in the atmosphere you are, the cooler the temperature. • As water vapor rises, it cools and condensation occurs. • Condensation is the process during which water vapor changes into liquid water. Stage3: precipitation • Water that falls from clouds to Earth's surface is called Precipitation. • Precipitation can be rain, snow, sleet, or hail. What do you know about Nitrogen element? Nitroge n Cycle Nitrogen Cycle • The atmosphere is 78% nitrogen • This nitrogen is on a form that plants and animals cannot use. • The process that changes atmospheric nitrogen into nitrogen compound that are usable by living things is called nitrogen fixation. Nitrogen Cycle • Plants and some other organisms take in this changed nitrogen from the soil and water. • Animals take in nitrogen when they eat the plants or other organisms. • When organisms die, bacteria help return the nitrogen in the tissues of dead organisms to the environment. Why is Oxygen gas important? Oxyge n Cycle Oxygen • Oxygen is a product of photosynthesis and reactant of cellular respiration. • The amount of oxygen in the atmosphere increased as the number of photosynthetic organisms on Earth increased. Oxygen Cycle • Oxygen might have entered the atmosphere when certain bacteria evolved that could carry out the process of photosynthesis and make their own food. • A by-product of photosynthesis is oxygen. • Other photosynthetic organisms evolved and the amount of oxygen in the atmosphere increased. Oxygen Cycle • Many living things. Including humans, take in oxygen and release carbon dioxide. • Plants take carbon dioxide gas from the air to make the photosynthesis process and produce oxygen.