"Change the Ecological Bottle" Biology and Environment PPT Download

Description

"Change the Ecological Bottle" Biology and Environment PPT Download

Part One Content: Collaborative Exploration

1. Reduce the water in the ecological bottle

proposed question

If there is less water, what will happen to the animals in the ecological bottle?

Speculate

The number of times animals in ecological bottles float to the surface will change

same conditions

Aquatic plants, bottle size, number of animals, etc.

different conditions

amount of water

experimental method

Put the same number of aquatic plants in the two bottles, keep the bottles the same size, put 10 cm of water in one bottle and 5 cm of water in the other bottle. All other conditions being equal, observe and record.

2. Increase the water plants in the ecological bottle

proposed question

Will increasing the number of aquatic plants affect aquatic life?

Speculate

Will affect the life of living things

same conditions

The size of the bottle, the number of animals, the amount of water

different conditions

How many aquatic plants

experimental method

Put equal amounts of water into two identical bottles, put 4 identical small fishes in each, and place the bottles in the same place. Put 4 aquatic plants in one bottle and 8 aquatic plants in another bottle, observe and record.

Change the ecological bottle PPT, part 2: knowledge summary

Reducing water and adding animals and plants will cause environmental changes in the ecological bottle and affect the living environment of organisms. The number and type of organisms in the ecological bottle should be balanced.

Knowledge wide angle

Biologist Darwin discovered through long-term observation that the number of mice is determined by the number of cats. It turns out that there are interesting and complex relationships between seemingly unrelated plants and animals such as clovers, bumblebees, mice and cats. In this way, based on the mutual constraints and interdependence between living things, Darwin finally wrote great works such as "The Origin of Species" after progressive and in-depth observation and research, and became the world's outstanding scientist and the founder of the theory of biological evolution in the 19th century.

Changing the Ecological Bottle PPT, Part 3: Classroom Exercises

1. The ( ) and ( ) of the organisms in the ecological bottle must be balanced.

2. If there are too many plants, the ( ) and ( ) they consume will also increase, which will affect the survival of other organisms.

3. As aquatic plants increase, the number of ( ) produced increases, and the number of times that small fish float to the surface will decrease.

Change the ecological bottle PPT, part 4 content: homework

Thinking: If we want the creatures in the ecological bottle to live better, what should we pay attention to?

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For more information about the "Biology and Environment Change Ecological Bottle" PPT courseware, please click the Biology and Environment ppt Change Ecological Bottle ppt label.

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"Changing the Ecological Bottle" Biology and Environment PPT Part One Content: Reduce the Water in the Ecological Bottle Pour out half of the water in the ecological bottle and keep the number of organisms in the ecological bottle unchanged. Predict what changes will happen to the organisms in the ecological bottle? Record the small fish in the ecological bottle in the water...

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Update Time: 2024-11-22

This template belongs to science courseware Fifth Grade Science Volume 1, Textbook Edition industry PPT template

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