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Carbon-Oxygen Cycle
David 5th Grade Science Quiz pB8-B11
| Question | Answer |
|---|---|
| The process by which carbon and oxygen cycle among plants, animals, and the environment | Carbon-Oxygen Cycle |
| The cycling of carbon and oxygen through the environment depends on what 2 processes? | Photosynthesis & respiration |
| The process that releases energy from food or turns food into energy | Respiration |
| During photosynthesis, plants and some other organisms take in ____ _____ from the air or the water in which they live. | Carbon dioxide |
| Carbon Dioxide is a byproduct of _________ | combustion |
| 3 things plants use in photosynthesis | sunlight, water, and carbon dioxide |
| Plants release ________ into the atmosphere as a byproduct of photosynthesis. | oxygen |
| As forests died, carbon in the plants became ______. | coal |
| Combustion is the ______ of fuels. | burning |
| Almost 90% of the oxygen in the atmosphere comes from photosynthesis in the _________. | oceans |
| Over millions of years, the carbon in some decaying ocean organisms turned into _________. | petroleum |
| Since the Industrial Revolution, about 200 years ago, _____ ____ has started to change the balance of the carbon-oxygen cycle. | human activity |
| The total size of Earth's forest is ______ each year. | smaller |
| ________ use large amounts of carbon dioxide. | Forests |
| The burning of _______ _____ _____ put tons of carbon dioxide into the air each year. | wood and coal |
| Excess carbon dioxide is ________ to animals. | poisonous |
| Some carbon is stored for a while in the bodies of ____ organisms. | dead |
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tisha12