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

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"Exploring the Impact of Environmental Pollution on Biology" The Impact of Human Activities on the Biosphere PPT Courseware 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. Residents living within dozens of kilometers around the nuclear power plant were evacuated, and the rescuers who stayed behind to deal with the nuclear leakage were called "kamikaze". It can be seen that nuclear pollution can cause serious harm to living things. What other examples can you name of environmental pollution causing harm to living things?

The hazards caused by environmental pollution to living things include: water pollution, air pollution, noise pollution, radioactive pollution, etc.

Simulation exploration: The impact of acid rain on organisms

1. [Ask a question] Does acid rain affect living things?

2. [Make a hypothesis] Acid rain has an impact on living things.

3. [Design and complete experiments] Use control methods

4. Use simulated acid rain: Mix water and vinegar at a ratio of 1:1 to get artificial acid rain.

5. Experimental group: Add an appropriate amount of water and an equal amount of vinegar into the cup, and add 20 mung beans.

6. Control group: Add appropriate amount of water to the bowl and add 20 mung beans.

Analysis of results

Experimental group: 20 seeds, none of them germinated.

Control group: 20 seeds, all seeds germinated.

Explain that acid rain can prevent plants from growing.

[Conclusion]: Acid rain affects living things

discuss:

1. What is the difference between simulated acid rain and real acid rain?

The components of acid rain and simulated acid rain are different: the main components of acid rain are water, sulfuric acid and nitric acid, while the components of simulated acid rain are water and acetic acid.

2. Is acid rain necessarily caused by harmful emissions in the area?

Not certainly. This is because acid rain is formed when sulfur dioxide and nitrogen oxides produced when burning coal, oil, and natural gas combine with water in the atmosphere. Acid rain can drift with the flow of the atmosphere, so acid rain is not necessarily caused by harmful emissions in the area. , Acid rain can even cause cross-regional and cross-border harm.

practise:

1. Which of the following statements about acid rain is incorrect ( )

A. Acid rain not only affects the growth of plants, but also corrodes buildings;

B. Acid rain mainly occurs in cities and suburbs with many factories;

C. Acid rain can acidify rivers and lakes, threatening people’s health;

D. Acid rain is caused by smoke emitted by factories and has nothing to do with exhaust gases emitted by motor vehicles.

2. Some people say that the pollutants that cause environmental pollution are actually misplaced resources. Do you agree with this statement? Why?

agree. Pollutants that cause harm to the environment can be recovered and recycled using certain measures and technologies. This not only reduces environmental pollution, but also improves resource utilization efficiency and reduces resource waste. For example, heavy metals or nutrients such as nitrogen and phosphorus in wastewater can be recycled and reused. Therefore, it can be said that the pollutants causing environmental pollution are misplaced resources. Solid waste can be classified in the following ways: ① recyclable and non-recyclable; ② flammable and non-flammable; ③ toxic and non-toxic. Household solid waste: cans, waste mineral water bottles, banana peels, etc. Among them, solid waste that can be recycled: cans, waste mineral water bottles, etc. Solid waste (garbage) is an environmental pollutant, but it is also a "misplaced resource" in a sense. So there is a connection.

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"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 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..

"Exploring the Impact of Environmental Pollution on Biology" Impact of Human Activities on the Biosphere PPT Courseware 2:

"Exploring the Impact of Environmental Pollution on Biology" PPT Courseware on the Impact of Human Activities on the Biosphere 2 Think about it: 1. What kind of rain is acid rain? 2. Are the components of acid rain the same as those used to simulate acid rain in our experiments? 3. The acid rain we experience must be caused by our local...

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Update Time: 2024-07-29

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