Shadow and Sundial

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Questions and Answers

阴影是由什么形成的？

What forms shadows? Answer: Light and opaque objects.

哪个因素会影响阴影的形成？

物体的材质
光源的位置和方向 (correct)
阴影的颜色
空气湿度

光源的位置和方向以及物体的形状会如何影响阴影？

How do the position and direction of the light source and shape of the object affect shadows? Answer: They affect the direction and length of the shadows.

阴影在日常生活中有哪些影响？

既有正面影响也有负面影响 (C) Signup and view all the answers

古代计时仪器有哪些？

What are some ancient timing instruments? Answer: Sundial, water clock, and hourglass, etc. Signup and view all the answers

日晷是什么？

一种古老的计时器 (A) Signup and view all the answers

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Study Notes

Shadows are formed by light and opaque objects.
The position and direction of light source and shape of the object affect the shadow.
Shadows have both positive and negative impacts on daily life.
The length and direction of shadows change throughout the day.
Shadows change from long to short and then back to long during the day.
Shadows move from west to east during the day.
The direction and length of shadows change throughout the day.
Sundial is an ancient timing instrument.
Sundial consists of a dial and a gnomon.
Sundial and other timing tools such as water clocks and hourglass led to the invention of modern clocks.