"The Biosphere is the Largest Ecosystem" Understanding the Biosphere PPT Courseware 8

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"The Biosphere is the Largest Ecosystem" Understanding the Biosphere PPT Courseware 8

Ask students to self-study the content on pages P28-30 of the textbook and understand the types of ecosystems.

forest ecosystem

Distribution: Wetter areas.

Characteristics: Plant and animal species ________, complex and stable structure.

Function: water conservation, __________, etc.

grassland ecosystem

(1) Distribution: ________ area.

(2) Characteristics: Annual rainfall is very little and there is a lack of tall plants.

(3) Function: windproof and sand-fixing.

marine ecosystem

Composition: Ocean and marine life.

Characteristics: Plants are mainly ________ plants, and there are many kinds of animals.

Role: Participate in regulating global climate.

discuss

Does the ecosystem mentioned above exist independently? Is it related to other ecosystems?

The biosphere is a unified whole

Ask students to self-study the content on pages P30-32 and think about it based on "data analysis":

1. Which ecosystems are the river ecosystems related to?

2. Why do we say that ecosystems do not exist independently? How does it relate to other ecosystems?

summary:

Ecosystems at different levels are interrelated, as shown in:

①From the perspective of abiotic factors, all ecosystems on the earth are affected by factors such as _____, _____, and ____.

②In terms of regional relationships, various ecosystems are _________.

③From the perspective of organisms in the ecosystem, an organism can go through different _________.

Goal 1 Types and characteristics of ecosystems

[Breakthrough 1] Among the following pairings about different ecosystems and their characteristics or functions, which one is wrong ( )

A. Forest ecosystem - a wide variety of animals and plants, with strong automatic adjustment capabilities

B． Grassland ecosystem – found in arid areas with low rainfall

C. Wetland ecosystem - has the function of purifying water sources

D. Urban ecosystem - domestic animals are the main consumers and are dominated by humans

Goal 2: The biosphere is a unified whole

[Breakthrough 2] The following examples do not reflect that the biosphere is a unified whole

A. The sun shines on all ecosystems

B． Pollution in rivers affects marine life

C. Bird migrations span multiple ecosystems

D. Pesticides can kill farmland pests

[Breakthrough Points] All ecosystems are interconnected and unified, and each ecosystem is associated with other surrounding ecosystems to form the largest ecosystem - the biosphere.

Standard training

1. Ecosystems are related, as shown in ( )

A. Abiotic factors affect various ecosystems

B.Regions are interrelated

C. Organisms sometimes arrive in different ecosystems

D.A, B, and C are all

2. Although the area where the pesticide "DDT" is applied only accounts for a small part of the land area, DDT has also been found in animals as far away as Antarctica. This phenomenon shows that ( )

A.DDT is highly volatile

B. These Antarctic animals may have migrated from the pesticide application area

C. Many of the impacts of human activities on the environment are global.

D. The expedition team brought DDT to Antarctica

3. The main body of the urban ecosystem is ( )

A. People B. Green plants

C. High-rise buildings D. Animals

4. Which of the following ecosystems are known as "green reservoirs" ( )

A.Marine ecosystem

B. Farmland ecosystem

C. Forest ecosystem

D.Freshwater ecosystem

skill training

make assumptions

Classmate Xiao Ming said: "My father said that when he was a child, there were many fish and shrimps in the river near the village, and there were also many eels and loaches in the rice fields. Now there are almost no fish and shrimps in the rivers and rice fields. This is related to changes in the environment. What does it matter?"

In response to the questions raised by Xiao Ming, please make assumptions.

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Update Time: 2024-07-22

This template belongs to biology courseware People's Education Edition seventh grade biology volume 1 industry PPT template

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