Science Study Guide Lesson 2-3
|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.
|Litter||Trash causing harm in ecosystems.|
|Pollution||Harmful materials in the environment .|
|Pollutant||The harmful material that causes the pollution,gas,smoke,plastic.|
|Hazardous waste||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?|| a)Conserve water|
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?||Hazardous waste.|
|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.