Term
| problems that invasive species can bring to an ecosystem |
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Definition
1. increased number of predators of a native species
2. diseases
3. increased competition for food and water |
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Term
| 2 parts of the carbon cycle |
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Definition
1. photosynthesis
2. respiration |
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Term
| four parts of the Water Cycle |
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Definition
1. precipitation
2. transpiration
3. evaporation
4. condensation |
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Term
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Definition
Some areas of the earth have four, but
other areas have only two. |
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Term
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Definition
| a regular pattern of change |
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Term
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Definition
| any physical hazard to life caused by having too much or too little of things needed for life |
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Term
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Definition
| changes as the seasons change in many parts of the earth |
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Term
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Definition
| does not have a definite beginning or ending |
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Term
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Definition
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Term
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Definition
| get nitrogen compounds by eating other animals and plants |
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Term
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Definition
| has to be combined with other elements before it can be used |
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Term
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Definition
| most often changed into usable compunds by bacteria |
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Term
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Definition
| needed for the water cycle and for the carbon cycle during photosynthesis |
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Term
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Definition
| occur whenever an ecosystem receives more water than it can store or use |
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Term
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Definition
| occurs whenever an ecosystem receives less water than it needs |
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Term
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Definition
| part of the water cycle and also carries nitrogen compounds down to earth |
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Term
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Definition
| plant and animal species that originally live in an ecosystem |
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Term
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Definition
pollution
habitat destruction
excessive hunting and fishing |
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Term
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Definition
| precipitation that has soaked into the ground and is stored there |
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Term
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Definition
| probably the largest man-made stress |
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Term
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Definition
| regular divisions of the year |
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Term
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Definition
| species that are not native to an ecosystem and can cause harm |
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Term
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Definition
| the gradual changes in the populations of organisms in an ecosystem |
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Term
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Definition
| when a species' population could become endangered in the near future |
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Term
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Definition
| when a species' population is so small that the species may soon become extinct |
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Term
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Definition
| when people and animals breathe in oxygen and breath out carbon dioxide |
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Term
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Definition
| when plants release water vapor into the air |
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Term
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Definition
| when plants take in carbon dioxide and release oxygen |
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Term
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Definition
| when the last known member of a species dies |
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