What are pollutants?
Materials that harm living things.
What is the difference between pollution and hazardous waste?
Much smaller amounts of hazardous waste can be harmful.
How might pollution in a water ecosystem affect a land ecosystem?
Land animals can be effected by eating polluted food from the water.
What are two ways that humans change land ecosystems?
a)By building cities, roads, and farms.
b) By taking resources such as trees,water,and minerals from an ecosystem.
What is one way to solve the problems with landfills?
Compost,recycle,reuse all can save space in landfills.
What happens to biodegradable materials after they are brokendown by microorganisms?
Materials become part of the soil.
Why are landfills tightly packed and sealed?
To prevent hazardous waste from reaking.
What are two problems with landfills?
a)Take up space.
b)Materials in them do not break down.
Trash causing harm in ecosystems.
Harmful materials in the environment .
The harmful material that causes the pollution,gas,smoke,plastic.
Waste that can pollute the environmentin very small amounts.
In what ways do humans depend on the rain forest?
For medicine, food and oxygen.
What is one way rain forests can be preserved?
Products such as nuts,vegetable oils, and medicine can be harvested without cutting down trees.
What are some goals of green agriculture?
c)Does not harm ecosystem
What type of pollution might weed-killer and insect-killer be classified as if they run off a field and into a stream?
How can farmers prevent nutrients in soil from being used up?
Farmers can rotate crops.
In what two ways can recycling paper help ecosystems ?
a)Reduce space taken up in landfills.
b)Can reduce the number of trees cut doen to make paper.
What is the difference betwwn reusing and recycling?
Reusing-using an object again.
Recycling-change the form of an object.