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Authoritative PPT Summary
"Respiration" PPT
Part One: Situation Import
Why do seeds that have been stored for a long time get hot? Why is there a hole in the bottom of the flower pot? Why do radishes become hollow after being stored for a long time?
These phenomena are common in daily life, but can you tell the specific reasons? Let's learn about plant respiration through experiments.
learning target
1. Learn how to detect oxygen and carbon dioxide.
2. Explain that the energy required for plant growth comes from the oxidative decomposition of organic matter in cells.
3. Explain the essence and significance of respiration.
Respiration PPT, Part 2: Thoughts and Discussions
Why did the candle in the bottle on the left burn out faster?
Without oxygen in the bottle, the candle cannot burn
Name the role of cooked seeds in the demonstration experiment.
control effect
Why put the experimental setup in a warm environment?
Warm environment, strong respiration of seeds, good experimental results
Analyzing the experimental phenomena, what conclusion did you draw?
Seeds absorb oxygen when they germinate and respire
Thoughts and discussions 2
(1) Tell me the function of a funnel adding water to a bottle?
Remove the gas from the bottle
(2) What gas makes clear lime water turbid?
carbon dioxide gas
(3) Analyzing the experimental phenomena, what conclusion did you draw?
Germinating seeds release carbon dioxide when they respire
Experimental phenomenon: The gas in bottle A can make the clear lime water turbid, indicating that the gas in bottle A contains a large amount of carbon dioxide, but there is no obvious phenomenon in bottle B.
Experiments have shown that germinating seeds release carbon dioxide when they respire.
Respiration PPT, part 3: Plant cells can all perform respiration
1. Explore the respiration of plant cells
Ask questions: What gases do plants inhale during respiration? What gases do they exhale?
Make a hypothesis: Plants breathe in oxygen and exhale carbon dioxide.
Experimental verification:
"Experiment 1" explains: Germinating seeds absorb oxygen when they respire.
"Experiment 2" explains: Germinating seeds release carbon dioxide when they respire.
2. Root, stem, and leaf cells of plants can also perform respiration.
3. Comparison of photosynthesis and respiration
Respiration PPT, Part 4: Training to meet standards
1. The gas released by the germinated seeds in the bottle can extinguish the burning flame. This is because ( ).
A. Respiration, consuming oxygen and releasing carbon dioxide
B． Respiration, absorbing carbon dioxide and releasing oxygen
C. Photosynthesis, absorbing carbon dioxide and releasing oxygen
D. Photosynthesis, absorbing oxygen and exhaling carbon dioxide
2. The substance that can make clear lime water turbid is ( )
A. Water B. Oxygen C. carbon dioxide D. nitrogen
3. The formula that correctly expresses the respiration process is ( ).
A. Water + carbon dioxide → organic matter + oxygen + energy
B． Oxygen + organic matter → carbon dioxide + water + energy
C. Organic matter + carbon dioxide → water + oxygen + energy
D. Water + oxygen → organic matter + carbon dioxide + energy
4. The most important significance of respiration is ( )
A. Exhale carbon dioxide B. Provide energy for life activities
C. Consumption of oxygen D. Decomposition of organic matter
Keywords: Beijing Normal University edition seventh grade biology PPT courseware free download, respiration PPT download, .PPT format;
For more information about the "Lifestyle Respiration of Green Flowering Plants" PPT courseware, please click the "Lifestyle Respiration of Green Flowering Plants ppt" tag.
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