"Inspection of the Natural Waters in My Hometown" Environment and Us PPT Courseware 4

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"Inspection of the Natural Waters in My Hometown" Environment and Us PPT Courseware 4

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Examine the quality of the water around you and discuss it in class!

Precautions when using a microscope

1. Get water and prepare a slide specimen.

2. Place.

3. To the light.

4. Raise the objective lens and place the slide specimen.

5. Lower the objective lens and adjust the focus.

6. Move the slide specimen so that the image is in the middle of the field of view. (The specimen moving direction is opposite to the image moving direction)

Things to note when observing:

1. Observe carefully to prevent water samples from splashing.

2. Do not touch it directly with your hands.

3. When smelling, you should gently fan the mouth of the bottle with your hands to allow only a small amount of smell to drift into your nostrils. It is forbidden to put your nose to the mouth of the container to smell it.

4. When observing with a microscope, be careful and follow correct steps.

According to the environmental functions and protection objectives of surface water areas, they are divided into five categories according to their functions:

Category I is mainly applicable to source water and national nature reserves;

Category II is mainly suitable for first-level protected areas of centralized drinking water surface water sources, rare aquatic creature habitats, fish and shrimp production grounds, feeding grounds for young and young fish, etc.;

Category III is mainly suitable for fishery waters and swimming areas such as secondary protection areas of centralized drinking water surface water sources, fish and shrimp wintering grounds, migratory passages, aquaculture areas, etc.;

Category IV is mainly suitable for general industrial water areas and recreational water areas with indirect human contact;

Category V is mainly suitable for agricultural water areas and waters with general landscape requirements.

How to protect the water environment in our hometown?

My advice:

Start with yourself and don’t throw garbage into the creek.

Spread the word to those around you about protecting our creeks.

Spontaneous organization to clean up litter on the creek.

Recommend to the government to strengthen the management of creeks.

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"Inspection of the Natural Waters in My Hometown" Environment and Us PPT download:

"Inspecting the Natural Waters in My Hometown" Environment and Us PPT Download Part One: Introduction of New Lessons Is the water in the natural waters in my hometown polluted? What causes pollution? Let’s go check it out! Discuss in groups and think about what to pay attention to during the inspection...

"Inspecting the Natural Waters of My Hometown" Environment and Us PPT:

"Inspecting the Natural Waters in My Hometown" Environment and Us PPT Part One: Making a Plan Is the water in the natural waters in my hometown polluted? What causes pollution? Let’s go check it out! Preparation before the inspection activity 1. Discuss the plan of the inspection activity..

"Inspection of the Natural Waters in My Hometown" Environment and Us PPT Courseware 3:

"Inspection of the Natural Waters in My Hometown" Environment and Us PPT Courseware 3 What are the conventional analysis indicators of water pollution? The main conventional analysis indicators of water pollution are: (1) Odor is one of the sensory indicators for judging the quality of water. Clean water is odorless. , the odor occurs only after being polluted. ..

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Update Time: 2024-07-22

This template belongs to science courseware Science Edition for Sixth Grade Science Volume 2 industry PPT template

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