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10
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what is decomposer
an organism that breaks down organic materials
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How composting happens?Â
Composting happens when organic materials break down into a nutrient-rich matter.
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The process by which soil is worn away.
erosion
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Erosion is caused by human activities? Give examples.
Farming remove top soils. Poor construction make the ground's surface soil bare, which speeds up erosion.
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Why backyard composting is good? What kinds of food to avoid for backyard composting and why?
It reduce waste goest into the dump and provides nutrient rich soils. Meat and dairy produts because they attract rodents.
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thief
Give points!
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25
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magnet
Take 25 points!
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rocket
Go to first place!
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lifesaver
Give 15 points!
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heart
Other team wins 10 points!
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star
Double points!
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gift
Win 20 points!
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baam
Lose 25 points!
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baam
Lose 20 points!
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fairy
Take points!
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fairy
Take points!
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banana
Go to last place!
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10
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depending on each other
interdependence
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What 4 things does compost need?
It need water and air, decomposer and microorganisms
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How plants help soil? 3 examples
Decaying plants enrich soil, roots keep soil from blowing away, roots break up hard soil
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Erosion is caused by natural event? Give examples.
Strong wind, heavy rain, glacier and moving water blow the soil away.
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Thinngs that we can do to prevent soil erosion.
plant treees or vegetation. cover soil with mulch and build windbreaks (tall tree) to protect soil.
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How earthworm help soil and plants. Give 3 examples
Earthworms move around to create passage of water and air into the soil. They break down organic matter. They create humus.
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clay building material made from earth and organic materials
adobe
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What is compost?
a muixture of decaying organic matter.Â
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