II. Answer the following questions:
1. Why are high-frequency electromagnetic waves like X-ray and gamma rays harmful to living things?
2. How can UV rays be both beneficial and harmful to humans?
3. How does the balance of UV radiation from the sun and the radiated infrared help maintain global temperature?
4. How does light pollution in urban areas affect the lives of people ?
1. Why are high-frequency electromagnetic waves like X-ray and gamma rays harmful to living things?
2. How can UV rays be both beneficial and harmful to humans?
3. How does the balance of UV radiation from the sun and the radiated infrared help maintain global temperature?
4. How does light pollution in urban areas affect the lives of people ?
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Answer:
1. because X-rays have very high energy they are know as oinizing radiation and can harm living tissse. A very high radiation dose over a short amount of time causes radiation sickness, while lower does can give an increased risk of radiation- induse cancer.
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