16scienceWhat contracting membrane regulates the amount of light entering the eye? Is it the retina, iris, or pupil?Show AnswerLearn MoreShare
1scienceA great milestone in human science occurred in 1628, when the English physician William Harvey first described what important bodily function or system?Show AnswerLearn MoreShare
2scienceEmoticons, or smileys, are a series of typed characters frequently used in e-mails that resemble a face and express the writer's emotion. What does the following represent :-) (colon-dash-right parenthesis) ?Show AnswerLearn MoreShare
1scienceCustomarily, the primary colors of the visible spectrum were red, orange, yellow, green, blue, and violet. However, around 300 years ago, Sir Isaac Newton found another, situated between blue and violet, and named it what?Show AnswerLearn MoreShare
1scienceWhat name is given to the darkest part of a shadow cast by the earth or moon during an eclipse?Show AnswerLearn MoreShare
12scienceWhy do children in southern Marin County have fewer cavities than children in northern Marin County?Show AnswerLearn MoreShare
9scienceIn 1943, French underwater explorer Jacques Cousteau helped create an invention designed for underwater breathing, and 60's British rock group Jethro Tull named an album after it. What is it?Show AnswerLearn MoreShare
13scienceUntil the 18th century, this plant was grown for its beauty, but not eaten, since it was believed to be poisonous. Today it can be found in tossed salads. Which plant is this?Show AnswerLearn MoreShare
12scienceWhat kind of thin, wispy, feathery looking clouds, located four to twelve miles up, are usually the first sign that a weather front is approaching?Show AnswerLearn MoreShare
17scienceThis organ in the human body, about the size of your fist, is located behind the stomach. Its most important function is filtering foreign substances from the blood, as well as helping the body fight infections. What is the name of this organ?Show AnswerLearn MoreShare
7scienceWithin 50% margin of error: how long does it take for blood to make a complete tour through the human body, from the time it leaves the heart until it returns?Show AnswerLearn MoreShare
15scienceWhat do you call curved lines on a weather map connecting regions of equal atmospheric pressure?Show AnswerLearn MoreShare
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