Interactions and Ecosystems: Topic 4 to 6

What is precipitation?

_________ is the development of an ecosystem in an area that was initially bare.

Which processes bring carbon dioxide into the atmosphere?

Clearing forested land for farming often results in a reduction of birds. Why might this occur?

Bacteria are killing plants in a food wed. Which of the following would be true.

Many forests burn and then regrow after, what term best describes this?

A species becomes ________ when only a small number of its members are living

Plants use___ to make food and release___ to the environment.

A(n) _________ represents the number of organisms involved in each level of a food chain.

Which of the following are examples of abiotic parts of an environment?

How did DDT affect the peregrine falcon?

Fossil fuels are made from...

Which one of the following statements about an organism's niche in a community is true?

________ are harmful substances released by humans into the environment.

Algae, perch and mosquito larvae can be found in a pond. Identify the producer(s).

How will cutting down the rain forest affect air quality?

A food pyramid made up of grass, grasshopper, robins and cats. Which will provide the least organisms?

Which of the following is true about cycles?

The pH of the Great Lakes is 8. If they were subjected to acid rain, what would happen?

Why can pollutants, such as PCBs have long-term negative effects on an ecosystem?

___________ looks at changes in populations of organisms or in organisms themselves.

______occurs when harmful substances enter a food web and build up in higher-level consumers

Which two processes from water cycle move water from Earth to the atmosphere?

What is a change from a liquid to a vapor called?

In succession, what is the first process to take place?

Some species are at risk of no longer existing. This means that they could become______

Families reduce the amount of garbage by composting. What other activity is like composting?