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Authoritative PPT Summary
Hunan Education Edition Sixth Grade Volume 2 Science, Protect Our River of Life PPT
Part One: Group Discussion
water purification experiment
group discussion:
1. How to use experiments to simulate sewage treatment?
2. Design an experimental plan based on existing materials.
3. Understand the purpose of the experimental materials prepared.
4. Fill in the form.
1. Based on the existing materials, we can only carry out simple sewage treatment. Please choose the appropriate treatment method: Please put a √ in ( ).
Physical methods: precipitation and filtration ( )
Biological methods: bacterial decomposition ( )
Chemical method: Disinfection ( )
2. The physical method has two parts ( ) and ( ). In the experiment, you should first ( ) and then ( ).
Protecting our river of life PPT, part 2: group experiment requirements
Group experiment requirements:
1. Division of labor and cooperation.
2. Allocate time reasonably.
3. Compare and observe the water before and after purification.
4. Summarize and analyze the reasons for the success or failure of the experiment.
5. Fill in the observation record form.
Protecting our river of life PPT, part three: Experiment summary
Experiment summary:
Analyze the reasons for gains and losses in the experiment.
Sedimentation and filtration can generally only separate visible particulate impurities in sewage. There are many microorganisms and harmful chemicals that cannot be seen with the naked eye, and they need to be removed through other measures to make the water cleaner.
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"Protecting Our River of Life" PPT courseware:
Hunan Education Edition Sixth Grade Volume 2 Science, Protecting Our River of Life PPT Courseware, Part One: Facility Grilles to Protect the Environment: Its main function is to intercept large pieces of dirt in sewage, otherwise these large pieces of dirt Will block the pump or process pipeline of subsequent units..