"Classification and Recycling" Environment and Us PPT download

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"Classification and Recycling" Environment and Us PPT download

Part 1: Importing new lessons

For some wastes in life, we can recycle them from garbage and reprocess them. Doing so will not only reduce the amount of garbage, but also save a lot of natural resources.

What kind of waste can be recycled? How to recycle them?

Classification and recycling PPT, part 2: exploring new knowledge

Recyclable waste

Research nearby recycling depots or ask recycling workers what they recycle?

What are these items used for after recycling?

Plastic can be melted and formed multiple times, and recycling waste plastic can reduce environmental pollution.

Recycling glass is cheaper than making it directly from natural raw materials. Because the melting temperature of glass is much lower than the temperature of melting with raw materials.

Many metals can be melted down and reused. Recycling scrap metal not only saves energy but also saves mineral resources.

Sorting and packaging of garbage

The recycling of garbage requires the classification and concentration of usable materials. To recycle effectively, we must change the old habit of mixing garbage and classify and package domestic waste. This is the obligation of every citizen.

Think about it: What are the advantages of garbage classification?

What are the advantages of garbage classification?

1. Reduce land occupation: Some substances in domestic waste are not easily degraded, causing serious erosion of the land.

2. Reduce environmental pollution: Abandoned batteries contain toxic substances such as metallic mercury and cadmium, which can cause serious harm to humans.

3. Turn waste into treasure: 30%-40% of production waste can be recycled. This small but profitable resource should be cherished.

Investigate the classification requirements for domestic waste. How many categories are they generally divided into?

Domestic waste in China can generally be divided into four major categories: recyclable waste, kitchen waste, hazardous waste and other waste. "Other garbage", "kitchen waste" and "hazardous garbage" are all non-recyclable garbage.

Classification and recycling PPT, part three: expansion and extension

What are the advantages of waste recycling?

The waste recycling station mainly recycles various scrap metal, waste plastic, waste paper, waste glass and other materials. The reuse of these waste materials can save resources, save energy, save costs, reduce garbage, reduce pollution, and protect the environment.

Why recycle waste paper

The more paper is made of wood, the more it is recycled and reused. It means more trees are protected.

According to statistics, in cities, each person consumes 100 kilograms of paper every year. In order to make this paper, billions of trees have to be cut down every year. Therefore, we also need to develop a good habit of saving paper.

Classification and recycling PPT, part 4: summary of this lesson

1. Some raw materials in garbage can be recycled, which can reduce garbage and save resources.

2. Garbage classification and packaging facilitate garbage recycling and processing of some toxic waste.

3. Composting method can effectively reduce waste and form fertilizer.

Classification and recycling PPT, part 5: exercises for this lesson

1. Judgment questions

1. When we have no way to reduce the usage of some materials, we can reduce the amount of garbage by recycling the raw materials in the garbage and reprocessing them ( ).

2. Most of the recyclable items are made of glass, metal, paper, plastic, etc. ( ).

3. Used batteries do not need to be handled carefully, just throw them into the trash can. ( ).

4. To effectively recycle raw materials in garbage, the habit of mixing garbage must be changed ( )

2. Fill in the blanks

1. For some wastes in life, we can ________ them and _________ from the garbage.

2. In our lives, the items I often recycle include _______, _______, and __________.

3. Recycle waste. Doing so can not only _______________ but also _______________.

4. Recycling plastic products is very common in life, because plastic can _______________ and recycling plastic can __________.

3. Short answer questions

1. How many categories can China’s domestic waste be generally divided into? What are the differences? Which of them are non-recyclable garbage?

Domestic waste in China can generally be divided into four major categories: recyclable waste, kitchen waste, hazardous waste and other waste.

"Other garbage", "kitchen waste" and "hazardous garbage" are non-recyclable garbage.

2. How many categories of recyclable garbage are divided into?

Recyclable waste mainly includes five categories: waste paper, plastic, glass, metal and cloth.

Sorting and recycling PPT, Part 6: Homework

Share, what kind of experience do you have after studying this course?

Keywords: Free download of science PPT courseware for the second volume of the sixth grade in the textbook version, classification and recycling PPT download, environment and us PPT download, .PPT format;

For more information about the PPT courseware "Environment and Us Classification and Recycling", please click the Environment and Us ppt Classification and Recycling ppt tag.

"Classification and Recycling" Environment and Us PPT:

"Classification and Recycling" Environment and Us PPT Part One: Recyclable Waste Investigate nearby waste recycling stations or ask waste recycling workers, what do they recycle? What are these items used for after recycling? Plastic can be melted and formed multiple times,...

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Update Time: 2024-11-18

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