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| Question | Answer |
| What is a carbohydrate? | An organic compound consisting of hydrogen, oxygen, and carbon. |
| What is a secondary consumer? | An animal that feeds on smaller plant-eating animals in a food chain. |
| What is a transition zone? | A part of the Earth's mantle located between the lower mantle and the upper mantle. |
| What is an ecotone? | A transition area between two biomes. |
| What is a stratum? | A horizontal layer of material, especially one of several parallel layers arranged one on top of the other. |
| What is aggradation? | The filling and raising the level of the bed of a stream by deposition of sediment. |
| What is eutrophication? | Increase of nutrients to in an ecosystem. |
| What is an estuary? | A partly enclosed coastal body of brackish water with rivers or streams flowing into it, and a connection to the open sea. |
| What is a biome? | A collection of similar ecosystems. |
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