Carbon & Nitrogen Cycle
Water Cycle
Stresses
Unexpected Dangers
Miscellaneous
100
A regular pattern of change.
What is a cycle?
100
Water droplets from clouds that fall to the the earth.
What is precipitation?
100
The largest man-made stress.
What is habitat destruction?
100
Plants and animals that originally live in an ecosystem.
What is a native species?
100
Regular divisions of the year.
What are seasons?
200
During this process, plants take in carbon dioxide and release oxygen.
What is photosynthesis?
200
Liquid water changing to a gas is known as this.
What is evaporation?
200
Any physical hazard to life caused by having too much or too little of things needed for life.
What is a stress?
200
Species that are not native to the area and can cause harm.
What is an invasive species?
200
In many parts of the earth, this changes as the seasons change.
What is the temperature?
300
During this process, people and animals breathe in oxygen and breathe out carbon dioxide.
What is respiration?
300
When plants release water vapor into the air this occurs.
What is transpiration?
300
This occurs whenever an ecosystem receives more water than it can store or use.
What is a flood?
300
A species whose last known member has died is said to be this.
What is extinct?
300
Areas of the earth that usually have periods of lots of rain compared with periods of little rain are said to have_____ _________. (Two words)
What are two seasons?
400
Consumers obtain this compound by eating other plants or animals.
What is nitrogen?
400
Precipitation, transpiration, evaporation and condensation are all part of this cycle.
What is the water cycle?
400
The gradual changes in the population of organisms in an ecosystem.
What is succession?
400
When a species' population is so small that they may soon become extinct.
What is endangered?
400
If a species' population could become endangered in the near future, theya re said to be this.
What is threatened?
500
Nitrogen is most often changed into useable compounds by this.
What is bacteria?
500
The carbon cycle is dependent upon the water cycle because of its need for this in the cycle.
What is water?
500
This natural disaster is different from others because it has no definite beginning or ending.
What is a drought?
500
A species not native to an area that can bring disease or other problems to an ecosystem.
What is an invasive species?
500
Stresses such as: fires, floods and droughts are known as this type of stress.
What is a natural stress?
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