Lesson Plan of Impact of Non-biodegradable Materials
General Science Grade V
Students’ Learning Outcomes
· Explain the impact of non-biodegradable materials on the environment.
· Suggest ways to reduce the impact of non-biodegradable materials.
Information for Teachers
· Many artificial chemicals used in insect killer sprays (for example DDT: Di chloride Phylogeny Polyurethane) have serious effects on our lives. Some effects appear in short period of time but other take many years to appear.
· When DDT gets into our body, it enters into many organs and causes headache, nausea, vomiting, confusion and tumor.
· Plastic bags used in daily life can’t be decomposed by bacteria so we should restrict their use for example, for shopping, we should use paper / cloth bags or baskets instead of plastic bags.
· The impact of non-biodegradable materials can be reduced by recycling.
· Old tires are recycled into new one.
Material / Resources
Pictures showing harmful effects of burning of tires, plastic bottles etc. on environment and textbook.
Worm up Activity
Ask the students:
· Tell the name of mosquito / cockroach killer used at your homes.
· When you eat potato crisps, where do you throw its wrapper?
Development
Activity 1
· Make the following table on board and ask students to copy it in their notebooks.
· Ask students to match the harmful effects with relevant non-biodegradable items in the column given below:
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Non-biodegradable items
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Harmful effects on environment
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Plastic / Rubber items
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Throwing in open air causes blockage of sewage system which results in diseases.
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Shopping bags
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Throwing these items around, our environment gets untidy and unhealthy.
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Wood / Glass items
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When these are burnt, harmful gases enter air and cause different diseases.
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Teacher will conclude this activity by asking following questions:
· Should we use the same plastic bag many times for shopping?
· What happen if we throw plastic bags in water?
· Should we burn the wood items in open air?
· Should we recycle the glass items in factories for making new things?
Sum up / Conclusion
· The most commonly used chemicals in insect killer sprays have serious effects on our lives. Some side effects appear in short period of time but other take very long period (many years) for example DDT (used as insecticides) causes headache, nausea, vomiting, confusion and tumor in humans.
· Plastic bags used in daily life can’t be decomposed by bacteria so we should restrict its use. For example, for shopping, we should use paper /cloths bags or baskets instead of plastic bags.
· The impact of non-biodegradable materials can be reduced by recycling.
· Involve the students in solving the questions given at the end of chapter / unit in textbook.
Assessment
Activity:
· Ask the students what they should do to reduce the harmful effects of non-biodegradable materials (plastic items disposable items, shopping bags, wrappers rubbers /tires etc.
· Students should correct the following statements.
· We should throw above mentioned items in our surrounding.
· We should burn plastic / rubber and shopping bags on road side.
· Cloth bags, paper bags or baskets can’t be used for shopping.
· The DDT and mosquito killer are harmless to our health.
Follow up
· Tell the students that chart below lists the items that we often throw away. It also shows how long an item would take to break down, or disappear, once it is buried in land. Ask the students to fill the last column with their ideas on how to reuse the items.
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Objects
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How long it would take to disappear or break down in land
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One way I could reuse the items
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Paper bag
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30 days
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Plastic bag
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1000 years
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Aluminum Can
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200-500 years
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Styrofoam Cup
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1 million years or more
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Glass Bottles
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1 million years or more.
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