Homework help! im studying about the planets and astronomy. Can you help??

[Emma B]

- What is meant by the term "geologically dead" body of the solar system?































-How far is Mars from the sun in our solar system in AU?































- How long is a year on mars?































- What is magnitude?































- What is pulse?































-What is the brightness of mars as seen from Earth?































- What is the average day time and night time temperature on Mars?































- What is UV radiation?































-What are the harmful effects of UV radiation?















































- What are polar ice caps of Mars?















































if you know ANY of these answers please tell me. our teacher just gave us the paper and said look it all up online. and im having some trouble.















please and thankyou!

[Megan]

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hope this helps, I could answer most myself, but my answers wouldn't be very scientific-smart sounding. Now on to my own homework....

[colton1499]

Here is a link all about the Solar System!!! I'm sorry if it don't help.............i tried looking it up in my science books, but didn't find anything.........































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[zee_prime]

UV (ultraviolet)radiation is short wavelength radiation which you can't see. If you could see it, like some insects can, it would be just past the violet part of a rainbow. It is produced by very hot objects, like the Sun and like a welding torch. It makes your eyes smart, which is why a welder needs goggles to screen it out. It can cause cataracts in your eyes and skin cancer. Most of the UV light from the Sun is stopped by a thin layer of ozone high in the atmosphere, but man-made chemicals have destroyed some of this ozone, and where I live in NZ, UV levels are higher than normal, so you need to avoid going out in the Sun too much. A treaty called the Montreal Protocol was signed a few years ago.The countries which manufacture the chemicals which destroy ozone agreed to stop making them. UV radiation causes suntan and sunburn. Mars is colder than Earth. The warmest it ever gets is about 20 Celsius, but in winter, especially near the poles, it gets colder than Antarctica. The polar ice caps there are probably frozen carbon dioxide, not water. A year on Mars is nearly two Earth years. Magnitude is a measure of how bright a star or planet is. The smaller the number, the brighter it is. The brightest object in the sky, the Sun, has a magnitude of about minus 26. The faintest star you can see without a telescope has a magnitude of about 4 or 5. Mars is about 1.5 astronomical units from the Sun. That means it is about 1.5 times as far from the Sun as we are.

[mikaalw]

Wikipedia my dear friend