"Concern about the Rural Environment" PPT

Description

"Concern about the Rural Environment" PPT

Part One: Scenario Introduction

Our country is a major agricultural country and a major producer and consumer of pesticides. However, during the application of pesticides, injuries and deaths caused by pesticide poisoning often occur, and when the amount of highly toxic pesticide residues in agricultural products exceeds the standard, it often causes accidents for consumers. What should we pay attention to in this situation?

learning target

1. List the problems existing in the rural environment and the main characteristics of ecological agriculture.

2. Be able to design and implement activities to investigate environmental changes in hometown, draw preliminary conclusions, and communicate with the whole class.

3. Recognize the main problems existing in the rural environment and provide suggestions for the construction of hometown.

Pay attention to the rural environment PPT, the second part of the content: theme exploration

Explore theme one

Changes in hometown environment

Research activity: Compare the environment in your hometown yesterday and today

1. Is it true that “economic development must destroy the environment”?

2. In order to further beautify the environment of our hometown, what should we middle school students do within our ability?

Explore theme two

Develop ecological agriculture

Activity: Analyze and discuss the structure of an ecological agricultural village

1. Where does the total energy input into this agricultural ecosystem come from?

2. Where are decomposers mainly located in this agricultural ecosystem?

3. What are the advantages of the methods of handling crop straw and manure shown in the picture?

4. This village uses excess meat, eggs, and milk to set up a food processing factory. How do you think the scraps should be disposed of?

Pay attention to the rural environment PPT, the third part of the content: Class summary

1. Problems existing in the rural environment

The problem of "dirty, messy and poor" rural environment is prominent.

The comprehensive utilization rate of agricultural production waste is low.

Excessive use of agricultural fertilizers and pesticides.

2. Developing ecological agriculture is an effective way to achieve sustainable agricultural development.

(1) Optimize the agricultural structure - not only planting industry, but also breeding industry, food processing plants, etc. Improve the utilization rate of solar energy and increase the conversion rate of bioenergy in crops.

(2) Protect the synchronization of production, economic development and environmental protection - waste can be recycled and reused at multiple levels and in multiple ways, reducing the amount of chemical fertilizers and pesticides.

Pay attention to the rural environment PPT, the fourth part: training to meet standards

1. The following are opinions on the utilization of crop straw. The incorrect one is ( )

A． Burn it on the spot and return the ashes to the field, which is economical and cost-effective

B. Can be used as raw material for paper making and fiberboard

C． The broken pieces of guillotine are buried in the fields, and the organic matter slowly decomposes, but there is still a lot of waste.

D. The biogas is fermented or fed to livestock and then returned to the fields as fertilizer.

2. Compared with natural ecosystems, farmland ecosystems are relatively fragile. The reason is that farmland

ecosystem ( )

①Strong ecological balance and stability ②Ecosystem composition is single ③Ecosystem structure is complex

④ Poor stability of ecological balance ⑤ Wide variety of animals and plants ⑥ Simple ecosystem structure

A.①②③ B.②④⑥

C.③⑤⑥ D.①⑤⑥

Keywords: Beijing Normal University version of eighth grade biology PPT courseware for the second volume free download, focus on rural environment PPT download, .PPT format;

For more information about the PPT courseware "People and the Environment Pay Attention to the Rural Environment", please click the "People and the Environment ppt Pay Attention to the Rural Environment ppt" tag.

"Concern about the Rural Environment" PPT courseware:

"Concern about the Rural Environment" PPT courseware Part One: Production activities will affect the environment. Hazards of pesticides 1. Harmful to human health. There is a lack of necessary protection during the use of pesticides, and pesticide poisoning incidents occur from time to time. 2. Destroy the ecological balance and threaten biodiversity.

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Update Time: 2024-11-24

This template belongs to biology courseware Beijing Normal University Edition Eighth Grade Biology Volume 2 industry PPT template

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