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!["Timekeeping with the Sun" PPT](http://daogebangong.oss-cn-beijing.aliyuncs.com/ppt/preview/1/5c608274-d3f6-483a-b185-59bb40d78c22.webp)
Category | Format | Size |
---|---|---|
Qingdao Edition Third Grade Science Volume 1 | pptx | 6 MB |
Description
Qingdao version of third grade science, first volume, using the sun to tell time PPT
Part One: Teaching Objectives
teaching objectives
1. Understand the relationship between changes in the sun's position in the sky and changes in temperature over time.
2. Want to know, love to ask questions, and willing to cooperate and communicate.
3. Know how the length and direction of the shadow of the same object changes in the sun. Can use the sun and shadow to identify directions.
Timekeeping with the Sun PPT, Part 2: Timing Tools
What are the two parts of a standard table? How to use a standard table? What is the function of a standard table?
Answer: It consists of two parts: Gui and Biao. Guiping is placed in the north-south direction, and the table stands vertically at the southern end of Gui. The winter solstice, summer solstice and other solar terms can be judged based on the length of the shadow cast by the noon clock on the Gui surface.
What are the ancient timekeeping tools?
Answer: (hourglass) (sundial), (water clock) standard watch, etc.
What two parts does a sundial consist of? How to use a sundial? What is the function of a sundial?
Answer: A sundial consists of a pointer and a disc with graduations. Place the sundial in an open space with its surface parallel to the equator. The moment can be determined based on the shadow cast by the dial needle on the surface of the dial.
What are the two parts of a standard table? How to use a standard table? What is the function of a standard table?
Answer: It consists of two parts: Gui and Biao. Guiping is placed in the north-south direction, and the table stands vertically at the southern end of Gui. The winter solstice, summer solstice and other solar terms can be judged based on the length of the shadow cast by the noon clock on the Gui surface.
Using the sun to time PPT, part three: practice to meet standards
Practice to achieve standards
1. The ancient timekeeping tools include ______, ______, ______, etc.
2. People used the changing patterns of shadows of objects under sunlight throughout the day to create a timekeeping instrument called ______.
3. Write the name of the timing tool below.
4. Why can quicksand and running water keep time?
5. What are the advantages and disadvantages of using a sundial and an hourglass to tell time?
Keywords: Free download of Qingdao version of science PPT courseware for third grade volume 1, PPT download of timing with the sun, .PPT format;
For more information about the "Timekeeping with the Sun" PPT courseware, please click the "Timekeeping with the Sun" ppt tag.
"Timekeeping with the Sun" PPT courseware:
Qingdao version of third-grade science volume 1, using the sun to tell time PPT courseware, the first part of the content: The invention of the sundial How was the sundial invented? When the sun moves, the length and direction of the shadow of an object after being illuminated change regularly, which can be measured with time. Little information...
File Info
Update Time: 2024-09-04
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!["Timekeeping with the Sun" PPT](http://daogebangong.oss-cn-beijing.aliyuncs.com/ppt/preview/1/c8fb348b-1de2-4821-ab56-005cf1aab8a0.webp)