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What is compost?
a muixture of decaying organic matter.
what is decomposer
an organism that breaks down organic materials
How composting happens?
Composting happens when organic materials break down into a nutrient-rich matter.
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.
depending on each other
interdependence
How plants help soil? 3 examples
Decaying plants enrich soil, roots keep soil from blowing away, roots break up hard soil
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.
The process by which soil is worn away.
erosion
clay building material made from earth and organic materials
adobe
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.
Erosion is caused by natural event? Give examples.
Strong wind, heavy rain, glacier and moving water blow the soil away.
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.
What 4 things does compost need?
It need water and air, decomposer and microorganisms
