"Structure and Function of Ecosystems" PPT teaching courseware

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"Structure and Function of Ecosystems" PPT teaching courseware

Part 1: Pre-class exercises:

1. Factors that affect organisms’ ＿＿, __＿, ＿＿, etc. are called ecological factors; they can be divided into ＿＿＿ and ＿＿＿ categories. Biological factors refer to various environments such as ＿＿, ＿＿, __＿, _, ____ in their living environment. factor.

2. The basis for mixed stocking of freshwater fish in ponds is ()

A. Fish have different oxygen requirements

B. Fish have different requirements for water temperature

C. Fish have different requirements for sunlight

D. The feeding habits of fish and the water layers they inhabit are different.

PPT on the structure and function of ecosystems, part 2: analysis and thinking?

1. What is the relationship between these creatures on the grassland? Express their relationship with arrows?

2. What conditions do organisms need to survive in this environment?

It also needs sunlight, water, air, soil and suitable temperature. Without these abiotic factors, no living thing on the grassland can survive.

3. In order to prevent birds from eating grass seeds, what new problems will arise if a part of the pasture is covered with nets?

As a result, insects multiply in the pasture areas of the hooded areas, causing the grass leaves to be almost eaten up by the insects.

PPT on the structure and function of ecosystems, part 3: step-by-step learning

1. The concept of ecosystem

A unified whole formed by the interaction between a biological community and the abiotic factors in the environment in which it lives.

A forest, a piece of grassland, a piece of farmland, a lake, a river, etc. can be regarded as an ecosystem.

2. Types of ecosystems

1. Compared with the grassland ecosystem and the forest ecosystem, which type of ecosystem has more types of animals and plants?

2. The abiotic factors that affect marine life are very different from those on land. What are the main differences?

3. The farmland ecosystem is different from ecosystems such as forests, grasslands, and oceans. What plays a leading role in the farmland ecosystem?

3. The largest ecosystem: the biosphere

Ecosystems range in size from large to small. The largest ecosystem on earth is __________.

Why is the biosphere the largest ecosystem on earth?

1. Definition of biosphere: includes all living things on the earth and the abiotic factors in the environment in which they live.

2. Biosphere scope

Bottom of the atmosphere: 10 kilometers above the ground

Surface of the lithosphere: 2 to 3 kilometers below the ground

Most of the hydrosphere: 12 kilometers below the water surface

PPT on the structure and function of ecosystems, part 4: after-class exercises

1. Within a certain area, __________ and the __________ in the environment in which it lives together form an ecosystem.

2. The __________ on the earth and the __________ in the environment in which they live make up the biosphere. _____ is the largest ecosystem on earth.

3. The upper limit of the biosphere is about ___________ above the ground. The lower limit can reach the ocean trench about ____ kilometers from the sea level, or the rock layer about ____________ from the ground.

4. Ecosystems on Earth can be divided into __________ and __________. Water ecosystems can be further divided into: __________ and __________.

Terrestrial ecosystems can also be divided into _________, _________, _________, _________, _________, etc.

PPT on the structure and function of ecosystems, Part 5: Ecosystems

forest ecosystem

With a wide variety of animals and plants and complex community structures, it is the most complex ecosystem on land.

Can you name the components of a forest ecosystem?

grassland ecosystem

There are fewer species of animals and plants than in forest ecosystems, with herbaceous plants being the main species.

Function: animal husbandry base, climate regulation, wind protection and sand fixation.

marine ecosystem

It is composed of oceans and marine life. The plants are mainly phytoplankton. There are many kinds of animals, most of which can swim in the water.

freshwater ecosystem

It consists of freshwater bodies of water and freshwater organisms such as rivers, lakes or ponds.

Keywords: Free download of science PPT courseware for the second volume of the ninth grade of the Zhejiang Education Edition, PPT download of the structure and function of the ecosystem, .PPT format;

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"Structure and Function of Ecosystems" PPT courseware download:

"Structure and Function of Ecosystems" PPT courseware download Part One: New Lesson Introduction Living things must continuously ingest food to obtain energy. Where do these substances and energy originally come from? How is it transmitted in the ecosystem? Learning objectives 1. Explain the ecosystem...

"Structure and Function of Ecosystems" PPT download:

"Structure and Function of Ecosystems" PPT Download Part One: Situation Introduction The mantis stalks the cicada, and the oriole follows behind. What biological phenomenon is it talking about? Learning Objectives 1. Understand the components of ecosystems and the interrelationships among them. 2. Understand the concepts of food chain and food web..

"Structure and Function of Ecosystems" PPT courseware:

"Structure and Function of Ecosystems" PPT courseware Part One: Situation Introduction Why do organisms need to constantly obtain food? Where did these matter and energy originally come from? How are matter and energy transferred in the ecosystem? What are its characteristics? Why...

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Update Time: 2024-10-02

This template belongs to science courseware Zhejiang Education Edition Ninth Grade Science Volume 2 industry PPT template

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