Questions
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Summary
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- How is nature the perfect recycler?
1.1 What are plant and animal wastes?
1.2 How are plant and animal wastes recycled in nature?
1.3 What makes waste biodegradable?
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Waste from plants and animals is called natural waste.
- Natural waste is recycled in nature.
- When a plant or animal dies, it decomposes.
- Decomposers help to break down (decompose) dead plants and animals.
- Vermicomposting is the use of worms to help decompose plant and animal waste.
- Some waste is biodegradable and some is non-biodegradable.
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2. What types of waste result from human activity?
2.1 What is toxic waste?
2.2 How is waste disposed of in your community?
2.3 How can we protect our natural resources?
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Toxic waste is harmful to living things and the environment.
- Toxic waste should be handled carefully and disposed of properly to protect the environment and living things.
- Wastewater has been used and then goes down the drain. It is cleaned before it is reused.
- Conserving natural resources is important. Some natural resources are renewable and some are non-renewable.
- Reduce means to use less stuff.
- Reuse means to use something over.
- Recycling occurs when something new is made from an old product or its materials.
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3. How can we reduce the amount of waste produced?
3.1 How is a product made, used, and disposed?
3.2. Why is one packaging better than another?
3.3 How have individuals or groups made a difference regarding waste in our world?
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Light is absorbed by dark, rough opaque surfaces.
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Light is reflected by shiny, smooth opaque surfaces.
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Light is refracted through various materials (or objects such as prisms and lenses).
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White light can be separated into a spectrum.
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Various colours of light can be combined to produce new colours.
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Because light can be reflected and refracted, it can be used in many optical devices.
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