"Various Ecosystems in the Biosphere" PPT courseware

Description

"Various Ecosystems in the Biosphere" PPT courseware

Part One: Situation Import

Information: When you come to the underwater world, you can see many colorful corals and various fishes; when you come to the Gobi desert, you see only a few isolated plants; when you come to the prairie, a vast sea of Green grass comes into view, and cattle and sheep are grazing leisurely... Why are the creatures in different environments different?

learning target

1. Through group collaborative exploration, clarify that the biosphere is the largest ecosystem.

2. Name various ecosystems based on life experience, and agree that the biosphere is the common home of living things.

Various ecosystems in the biosphere PPT, part 2: theme exploration

Explore theme one

various ecosystems in the biosphere

1. Water ecosystem

(1) Freshwater ecosystem

(2) Marine ecosystem

2. Terrestrial ecosystem

(1) Forest ecosystem

(2) Grassland ecosystem

(3) Desert ecosystem

(4) Farmland ecosystem

(5) Urban ecosystem

3. The biosphere is the largest ecosystem on Earth

The scope of the biosphere

Thoughts and Discussions

1. What conditions are needed for the growth of sunflowers and cacti?

Requires sunlight, air, water, suitable temperature, inorganic salts, etc.

2. What conditions are needed for the growth of giraffes and cattle?

Requires water, air, nutrients, etc.

3. Why does drought reduce food production?

Water is necessary for plant growth, so drought will reduce food production

Exploration Topic 2 Ecological Balance

1. Concept: Within a certain period of time, the types and quantities of organisms in a natural ecosystem are generally relatively stable, and the energy flow and material circulation between them and between them and the environment also remain relatively stable. This relative stability The state is called ecological balance.

2. The ecosystem has the ability to self-regulate

The more species of organisms at each trophic level, the more complex the ecosystem's nutritional structure, the stronger the ecosystem's regulatory ability, and the more stable the ecosystem.

3. The self-regulating ability of the ecosystem is limited

⑴Our beautiful planet is often disturbed by natural disasters and human activities.

⑵When external interference exceeds the tolerance of the ecosystem, an ecological crisis will inevitably occur.

⑶Influence of natural factors

Various ecosystems in the biosphere PPT, part 3: Class summary

1. Various ecosystems in the biosphere

1. Water ecosystem

(1) Freshwater ecosystem; (2) Marine ecosystem.

2. Terrestrial ecosystem

(1) Forest ecosystem; (2) Grassland ecosystem;

(3) Desert ecosystem; (4) Farmland ecosystem;

(5) Urban ecosystem.

2. Ecological balance

1. Concept: The types and quantities of living things are relatively stable, the flow of energy and matter

The cycle is relatively stable.

2. The ecosystem has the ability to self-regulate

3. The self-regulating ability of the ecosystem is limited

⑴Our beautiful planet is often disturbed by natural disasters and human activities.

⑵When external interference exceeds the tolerance of the ecosystem, an ecological crisis will inevitably occur.

PPT on various ecosystems in the biosphere, part 4: training to meet standards

1. The most complex ecosystem with biological species is ( )

A. Farmland ecosystem B. Forest ecosystem

C. Wetland ecosystem D. Grassland ecosystem

2. Most of the creatures in the ocean live in the water layer within 150 meters of the sea level, mainly because there is a lack of water below 150 meters ( )

A. Oxygen B. Sunlight C. Nutrients D. Living space

3. A swamp can be regarded as a ( )

A. Desert ecosystem B. Wetland ecosystem

C. Lake ecosystem D. Farmland ecosystem

4. When astronauts fly into space on a spacecraft, they must start from the biosphere

It carries substances necessary to sustain life. These substances include ( )

A. Nutrients, fresh water, and suitable temperature

B. Sunlight, suitable temperature, and a certain living space

C. Fresh water, nutrients, air (oxygen)

D. Air (oxygen), sunlight, nutrients

Keywords: Jiangsu Education Edition eighth grade biology PPT courseware free download, various ecosystems in the biosphere PPT download, .PPT format;

For more information about the PPT courseware "The Biosphere is the Largest Ecosystem and the Various Ecosystems in the Biosphere", please click the "The Biosphere is the Largest Ecosystem ppt Various Ecosystems in the Biosphere" ppt tag.

"Various Ecosystems in the Biosphere" PPT:

"Various Ecosystems in the Biosphere" PPT Part One Content: Learning Objectives 1. List the types of ecosystems and the characteristics of the main ecosystems. 2. Explain that the biosphere is the largest ecosystem. 3. Clarify the concept of ecological balance and its self-regulation. 4.Example..

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Update Time: 2024-10-08

This template belongs to biology courseware Jiangsu Education Edition 8th Grade Biology Volume 1 industry PPT template

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