STEP 5: Set a timer and check on your sundial at different intervals during the day. Mark the time and placement of the pencil’s shadow to tell what time it is. The more accurate you want to be, the more makings you will need. Now you can use your sundial to tell the time, on ...
Sundials In our daily lives, we use clocks and watches to tell the time. How did ancient people do this? In ancient times, people used sundials to tell the time. A sundial is a flat circle with a stick in the middle. The circle looks like a clock face. It is marked with the hours...
油将跨学科| 科技SundialsIn our daily lives, we use clocks and watches to tell the time. How did ancient people do this?In ancient times, people used sundials to tell the time. A sundial is a flat circle with a stick in the middle. The circle looks like a clock face. It is marked...
Step 5 Use a clock to see what time it is.Turn the sundial so that the shadow(影子) of the straw shows the right hour on the sundial.Step 6 Watch how the shadow moves like the hands on a clock.Do you know why the shadow moves?(1)What is a sundial used for? ___A.Having fun...
Then color the sundial with the crayons.Step 3 When it's sunny, take the sundial outside and put it on the ground.4Use the rocks to hold it down and stop the wind from blowing it away.Step 4 Stick the straw into the center so that it goes into the ground.Step 5 Use a clock ...
However,sundials have a few disadvantages. Aside from the obvious problem of not being able to read a sundial when the sun isn't visible, relying on the Earth's daily turning is surprisingly inaccurate.“The turning is not precisely (4) _ _B__," Whibberley said. “The Earth speeds up...
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We use clocks, watches, and cell phones to tell time. But there are some old ways of telling time. A sundial(日冕) uses the sun to tell time. The sun makes a shadow on the sundial. The shadow tells the time of day. An hourglass(沙漏) uses sand to tell time. The sand falls ...
**原文:** We use clocks, watches, and cell phones to tell time. **分析:** 文中第一句提到,我们今天用钟、手表和手机计时。 **答案:** C. clocks 2. **问题2:** 人们可以通过看日晷上的什么来判断时间? **原文:** The sun makes a shadow on the sundial (日冕). The shadow tells the ...
When the sand has finished falling, you have to turn the sand glasses over.1. At first, the ancient people told the time by looking at A. the stick B. the shadow C. the sun D. the moon2. Which picture can be a "sundial"?A BC D3. Sundials can be used to tell the time when...