| Category | Format | Size |
|---|---|---|
| E-education edition sixth grade science volume 2 | pptx | 6 MB |
"The Sun and Earth's Material Changes" PPT Courseware 2
Description
"The Sun and Earth's Material Changes" PPT Courseware 2
sun and earth
In the previous lesson, we already knew that the sun is closely related to living things on the earth. Then please answer the following questions:
Can plants survive without the sun? Why?
What would happen to the life on earth if the sun suddenly disappeared?
material change phenomenon
Objects are composed of matter, and matter can change. There are two main types of changes. One is a change in the state of matter, such as water freezing. The other is a change in the composition of the substance, such as the burning of wood.
Some common material change phenomena
The three states of water.
combustion phenomenon.
Rock weathering.
Rubber aging.
air flow.
Biological metabolism.
Thought and Discussion: What role does the sun play in the water cycle? If there is no sun, can the water cycle proceed smoothly?
Review and review
In the lesson on the formation of pebbles last semester, we learned about weathering and breaking rocks into small pieces. Do you remember? What are the causes of rock weathering?
weathering of rocks
The weathering of rocks also requires the action of the sun, and we should know that the weathering of rocks is not only related to the production of pebbles, but also closely related to the formation of soil. So we can say that the formation of soil is related to the sun.
The sun causes air to rise, and cold air falls to form winds.
The sun heats liquid water into gaseous water vapor, forming a water cycle in nature.
The sun causes the rocks to expand when heated, shrink when cooled, and eventually break and weather.
Sun exposure ages rubber.
The sun causes plants to grow.
If there was no sun, how would existing natural phenomena change? (Choose an example and write down your own speculation)
Keywords: Teaching courseware of the Sun and the Earth's material changes, download the science PPT courseware for the second volume of the sixth grade in the E-education edition, download the sixth grade science slide courseware, download the PPT courseware of the Sun and the Earth's material changes, .PPT format;
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"The Sun and Earth's Material Changes" PPT courseware 3:
"The Sun and the Earth's Material Changes" PPT Courseware 3 The Sun and the Earth In the previous lesson, we already know that the sun is closely related to the creatures on the earth. So please answer the following questions: Can plants survive without the sun? Why? if..
"The Sun and Earth's Material Changes" PPT courseware:
"The Sun and Earth's Material Changes" PPT courseware The sun radiates energy to the surroundings in the form of electromagnetic waves, which is called solar radiation. The surface temperature of the sun is 6000K. How does the sun emit heat and generate energy? Nuclear fusion reaction: 4HHe+ energy data: (4 million tons/second 50..
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Update Time: 2024-07-06
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