Biogeochemical Cycles

Master Biogeochemical Cycles! Covers Carbon, Nitrogen, Phosphorus & Water. Fun science worksheet.

Carbon Dioxide-Oxygen Diagram Fill in the blanks on the diagram by using the key below:A. Oxygen is released by organism B. Carbon dioxide is released by organismC. Oxygen is taken in by organismD. Carbon dioxide is taken in by organism Sort the following descriptions on whether they help add or remove carbon dioxide from the atmosphere. Add CO2 to Atmosphere Combustion Burning fossils fuels, driving cars Organisms exhaling Decomposition (death decay) Humans animals Remove CO2 from Atmosphere Photosynthesis Carbon dioxide in the air reacts with the sea water to make carbonic acid in the ocean Marine organisms can use carbon dioxide to create shells Plants Nitrogen Cycle Nitrogen is an important element to all life on Earth. The nitrogen cycle describes how nitrogen moves between plants, animals, bacteria, the atmosphere, and soil in the ground. For nitrogen to be used by different life forms on Earth, it must change into different states or forms. Nitrogen in the atmosphere, or air, is N2. Other important states of nitrogen include Nitrates (N03), Nitrites (NO2), and Ammonium (NH4). The most important part of the cycle is bacteria. Bacteria help the nitrogen change between forms so it can be used. When nitrogen is absorbed by the soil, different bacteria help it to change states so it can be absorbed by plants. Animals then get their nitrogen by eating the plants. Type the number that corresponds to the correct step in the Nitrogen Cycle. Phosphorous Cycle Phosphorus is another one of the essential elements that cycle through the ecosystem. It is an element that is found in the ground and then taken up by plants and animals. Phosphorus starts its existence as phosphate ions in the rocks of the world. When it rains, the phosphates and other minerals are removed from the rocks and distributed in soils and the water all over the planet. It is then finally moved into the plants and animals that need it. For example, it is used in DNA, ATP energy and cell membranes. Use the image above to help you decide which statement best describes the rock cycle? Sedimentary rocks melt and cool to form metamorphic rocks. Igneous rocks melt and cool to form sedimentary rocks. Metamorphic rocks melt and cool to form igneous rocks. Igneous rocks melt and cool to form metamorphic rocks. Water Cycle Label the steps of the water cycle using the key. Which statement best describes the water cycle? When liquid is heated enough to change to a gas, it is called evaporation. When liquid is heated enough to change to a gas, it is called condensation. When liquid is heated enough to change to a gas, it is called precipitation. When liquid is heated enough to change to a gas, it is called groundwater. Which of the following is NOT TRUE regarding biogeochemical cycles? The way in which a specific element cycles through living and non-living things. The carbon cycle can influence global climate. Phosphorus cycles among organisms, rocks, and oceans. Most nitrogen cycles between air and living organisms. All of the answer choices are TRUE.