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

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"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 experiments to explore the impact of acid rain or waste batteries on organisms.

3. Recognize the impact of environmental pollution on living things and improve environmental awareness.

1. Acid rain hazards and prevention

1. What is acid rain? How did it form?

Answer: (1) Acid rain: refers to rainwater with a pH value less than 5.6.

(2) The formation of acid rain is mainly caused by the emission of SO2 and nitrogen oxides into the atmosphere from the burning of fossil fuels.

2. Types and distribution of acid rain in my country

(1) Type: Acid rain in my country is mainly sulfuric acid type acid rain.

(2) Distribution: Acid rain in my country is mainly distributed in the southeastern region, and the southern region has become the hardest hit area by acid rain.

3. The harm of acid rain

(1) Endanger human health.

(2) Acidifying the river water, affecting the growth and reproduction of fish, and even causing mass deaths.

(3) It acidifies the soil and harms the growth of forests and crops.

(4) Corrosion of buildings and cultural relics.

Simulation inquiry reference answers:

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

2. Not necessarily. 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.

Explore: The impact of waste batteries on biology

Whether it is an ordinary dry battery or a button battery in an electronic watch, it contains a variety of chemical substances, and some also contain heavy metals such as mercury, silver, and cadmium. Our country is the world's largest battery consumer, with hundreds of millions of batteries used every year. However, the current recycling rate of waste batteries in our country is very low. A large number of waste batteries are thrown away with the garbage, and some are even littered everywhere. Heavy metals such as mercury, silver, and cadmium in the battery will leak into the soil with rainwater during the battery erosion process, contaminating the soil. With the movement of water in the soil, they will further pollute rivers, lakes, and oceans until they enter a variety of inside living things and humans.

Multiple choice questions:

1. In Jining’s Nansi Lake, duckweeds multiply in large numbers in autumn, even covering the entire lake. The main reason for the massive duckweed proliferation is ( )

A. Jining has a warm climate, suitable for the growth and reproduction of duckweed.

B． Domestic sewage rich in nitrogen, phosphorus and potassium is discharged into the

C. Mercury-containing industrial wastewater discharged into

D. People throw white trash into Nansi Lake

2. Acid rain is called the "god of death in the air" and is extremely harmful to living things. Which of the following statements is incorrect ( ).

A. Acid rain can acidify rivers and lakes. Acidified water sources threaten human health and affect people’s drinking water.

B. Acidified water sources affect the growth and development of aquatic organisms such as fish and shrimps

C. Acid rain directly harms buds and leaves, causing all plants in areas where acid rain occurs to die.

D. Acid rain causes nutrients in the soil to change so that they cannot be absorbed by plants.

3. Which of the following is not conducive to the protection of rural ecological environment? ( )

A. Vigorously plant trees and afforestation

B. Return farmland to forest and grassland

C. Use healthy and environmentally friendly chopsticks

D. Long-term use of pesticides and chemical fertilizers

4. In 1955, it was discovered in Toyama City, Japan that a painful "Itai-itai disease" was caused by ( ).

A. Cadmium poisoning b. Mercury poisoning

C. Lead poisoning D. iodine poisoning

5. Used dry batteries in cities have become a major problem that pollutes the environment. What is the best way to dispose of used batteries at home ( )?

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

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Update Time: 2024-07-22

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