(EARTH SCIENCE WEEK 7-8).docx - Earth Science Week 7-8...

Earth Science
Week 7-8
Lesson 13 How People
Generate Different
Types of Waste
What I Know
1. D
2. D
3. D
4. B
5. A
6. D
7. B
8. B
9. B
10. A
11. B
12. C
13. A
14. D
15. C
What In
Kinds of Waste
1. Biodegradable
2. Non-biodegradable
3. Solid waste
4. Liquid waste
5. Gaseous waste
6. Hazardous
Waste Management
1. Reduce
2. Reuse
3. Recycle
4. Incineration
5. Landfill
6. Composting

What’s New
1. Composting - is a organic material that can be added to soil in order to help plants grow.
2. Landfill - is a site for the disposal of waste materials.
3. 3 R’s - the Reduce, Reuse, Recycle elements are referred to as the 3 R’s. Reduce, the best way to
manage waste is to not produce it. Reuse makes the economic and environmental sense to
reuse products that takes creativity. And Recycle/Recycling is a series of steps that takes used
materials, processes and re-manufactures it and sells it as a new product.
4. Biodegradable waste - includes any organic matter in waste which can be broken down into
carbon dioxide, water, methane or simple organic molecules by micro-organisms and other
living things by composting, aerobic digestion, anaerobic digestion or similar processes.
5. Non-biodegradable waste - a kind of substance which cannot be broken down by natural
organisms and acts as a source of pollution.
What’s More
Activity 1
Solid waste Liquid waste Gaseous waste
Paint can
Scrap metal
Diaper
Detergent
Pipe water
Sewage
Waste water
Grease trap
Chlorofluorocarbon (CFC)
Methane
Activity 2
1. E
2. F
3. A
4. B
5. C
Activity 3
1. Solid waste, Liquid waste, Gaseous waste
2. Biodegradable, Non-biodegradable, Hazardous, Non-Hazardous
3. Municipal solid waste
4. Agricultural solid waste
5. Biomedical waste
What I Have Learned

A. Hazardous
B. Agricultural
C. Fishery
D. Material Recovery Facility, Compost Pit
What I Can Do
1. The advantages of biodegradable materials are: It reduce emission of carbon in the air, it
requires less amount of energy and does not need fossil fuels to be recycled, if biodegradable
materials are used, and there is no need to add more landfills since these materials can be
absorbed by the soil and be converted to compost or humus.
The disadvantages of biodegradable materials are: using biodegradable materials will be needing for
industrial composters to turn them into composts and availability of the equipment in some countries
can be a problem. Apart from the cost, not all countries have the proper equipment especially if this is
not the priority of the government. Biodegradable materials should not be mixed with non-
biodegradable when thrown in garbage bins. Once these two types are mixed together, these materials
become contaminated and cannot be used anymore. Consequently, these contaminated biodegradable
materials will end in landfills and add to the volume of thrash.