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Science Challenge #7

(Responders are from many places in the U.S. and even from overseas)

Question 1. Light of all colors (white light) comes to Earth from the sun. Why do we see a cloudless sky as blue and not white?

a) The cells in the retina of our eyes are most sensitive to blue light?
b) The Earth's magnetic field bends blue light more than yellow or red?
c) Tiny clusters of air molecules deflect the blue light toward Earth?

Question 2. Of the many species of spiders (perhaps more than 100,000 species of spider exist) very few are dangerous to humans. Which of the four named below has a poisonous venom in its fangs that is deadlier even than that of a rattlesnake?
Wolf spider, tarantula, black widow spider, recluse spider.

"THE STUMPER!" What is the most abundant element in the universe?

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