"Exploring the Impact of Environmental Pollution on Biology" PPT courseware on the impact of human activities on the biosphere

Description

"Exploring the Impact of Environmental Pollution on Biology" PPT courseware on the impact of human activities on the biosphere

Global air pollution problems include:

greenhouse effect

Ozone layer destruction

Acid Rain (Reaper in the Sky)

Greenhouse effect:

1. What is the greenhouse effect?

2. What harm does it have?

Ozone layer destruction:

1. What is the function of the ozone layer?

2. What are the dangers of the ozone layer hole?

Self-study textbook and answer the following questions:

1. What is acid rain? What is its ph value?

2. How is acid rain formed?

3. What are the dangers of acid rain?

4. How to prevent and control acid rain?

Explore experiments:

Effects of acid rain or waste battery leachate on organisms

hint:

Use vinegar and water to prepare simulated acid rain for experiment, and control the pH at 4.

Determine the germination rate of seeds under simulated acid rain or waste battery leachate conditions.

Initial implementation of research plan

Members of each group work together to carry out preliminary research plans. hint:

1. The experimental device was completed in class, and the selected materials were initially processed and sent to the "experimental base" of the group.

2. After class, group members continue to work together and do a good job in management, observation and recording.

3. What more work needs to be done to complete the entire process of this inquiry?

Expected experimental results and analysis:

1. If there is no difference in the germination rate of seeds in the two devices, it means that acid rain has no effect on the germination rate of seeds.

2. If the germination rate of seeds cultured with acid rain is relatively high, it means that acid rain has a promoting effect on the germination rate of seeds.

3. If the germination rate of seeds cultured in clean water is relatively high, it means that acid rain has an inhibitory effect on the germination rate of seeds.

What are the dangers of acid rain?

① Acid rain can cause chemical changes in nutrients in the soil so that they cannot be absorbed and utilized by plants.

②Acid rain can acidify rivers and lakes, thereby affecting the growth and development of aquatic organisms such as fish and shrimp, and in severe cases, causing death.

③Acidified water sources threaten human health and affect drinking water;

④ Acid rain directly harms the buds and leaves of plants, and in severe cases can cause the death of entire plants.

How to prevent and control acid rain?

The fundamental measure to control acid rain is to use purification devices to reduce the emissions of pollutants in coal, oil and other fuels, and to do a good job in recycling and utilizing these pollutants.

Classroom test:

1. The ingredient that is not found in acid rain is ( )

A Acetic acid B Sulfuric acid C Water D Nitric acid

2. The main substances causing acid rain and greenhouse effect are ( )

A carbon dioxide and sulfur dioxide B sulfur dioxide and carbon dioxide

C hydrochloric acid and carbon dioxide D sulfur dioxide and nitrogen

3. The best way to dispose of used batteries at home is ( )

A. Accumulate and bury deeply B. Throw it into the trash can

C. Burn D. Collect and hand them over to relevant departments for safe disposal

4. The following is Xiao Ding’s research experiment on “The Impact of Acid Rain on Biology”. The process is as follows:

Ask the question: Does acid rain affect seed germination?

Make a hypothesis: Acid rain has an effect on seed germination.

make plan:

(1) Prepare simulated acid rain with a pH of 4.

(2) Put 2 soybeans soaked overnight in a petri dish. (Put wet gauze on top and bottom of the seeds)

(3) Spray "simulated acid rain" on soybean seeds once a day, and observe and record the phenomenon.

Experimental results: Soybean seeds in the petri dish did not germinate.

Experimental conclusion: Acid rain has an impact on seed germination.

The experiment designed by Xiao Ding is not rigorous enough. Please point it out and make improvements.

Keywords: teaching courseware on the impact of human activities on the biosphere, teaching courseware on exploring the impact of environmental pollution on organisms, PPT courseware for seventh-grade biology volume 2 of the New People’s Education Edition, downloadable biology slide courseware for seventh-grade students, PPT courseware on the impact of human activities on the biosphere Download, explore the impact of environmental pollution on organisms PPT courseware download, .ppt format

For more information about the PPT courseware "The Impact of Human Activities on the Biosphere and Exploring the Impact of Environmental Pollution on Biology", please click the "The Impact of Human Activities on the Biosphere ppt Exploring the Impact of Environmental Pollution on Biology" ppt tag.

"Exploring the Impact of Environmental Pollution on Biology" The Impact of Human Activities on the Biosphere PPT Courseware 5:

"Exploring the Impact of Environmental Pollution on Biology" The Impact of Human Activities on the Biosphere PPT Courseware 5 Learning Objectives: 1. Acid rain and its causes, hazards, and control measures. 2. Simulation study: The impact of acid rain on organisms. (Key points) 3. Understand the hazards of waste batteries and their control...

"Exploring the Impact of Environmental Pollution on Biology" The Impact of Human Activities on the Biosphere PPT Courseware 4:

"Exploring the Impact of Environmental Pollution on Biology" PPT Courseware on the Impact of Human Activities on the Biosphere 4 Think about it and discuss it: In March 2011, a huge earthquake occurred in eastern Japan. The earthquake caused the leakage of radioactive materials from the Fukushima Nuclear Power Plant, causing serious nuclear pollution. Life..

"Exploring the Impact of Environmental Pollution on Biology" The Impact of Human Activities on the Biosphere PPT Courseware 3:

"Exploring the Impact of Environmental Pollution on Biology" The Impact of Human Activities on the Biosphere PPT Courseware 3 Teaching Objectives: 1. Take the hazards of acid rain or waste batteries as examples to illustrate the adverse effects of environmental pollution on organisms. 2. Design and complete a study on the impact of acid rain or waste batteries on organisms..

File Info

Update Time: 2024-09-30

This template belongs to biology courseware People's Education Press seventh grade biology book volume 2 industry PPT template

Preview