8scienceWhen blood is first pumped out of the human heart, it first enters a certain organ, then it returns to the heart a second time before continuing its trip through the body. Which organ is this?Show AnswerLearn MoreShare
20scienceThe first microwave ovens were created in which decade: 1970's, 1960's, 1950's, or 1940's?Show AnswerLearn MoreShare
6scienceIn Bay Area there is an organization called "Lovers of the Stinking Rose," dedicated to what miracle bulb?Show AnswerLearn MoreShare
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
19sciencea. How many bones in the human body? b. Of these 206 bones, about 1/4 of them are located in which part of the human body?Show AnswerLearn MoreShare
9scienceCan you name four materials, considered almost as valuable as gems, and frequently used as jewelry, that come from plants and animals?Show AnswerLearn MoreShare
10scienceThis chemical element makes up about 1/4 of the earth's crust; it is the main ingredient of sand, is the main ingredient of glass, is used in the making of computers, and can also be made into synthetic rubber. What is this element?Show AnswerLearn MoreShare
1scienceIn physics, what unit of measure is defined as the ratio of the mass of a substance to its volume, expressed in grams per cubic centimeter or pounds per cubic foot?Show AnswerLearn MoreShare
15scienceWhat do you call curved lines on a weather map connecting regions of equal atmospheric pressure?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
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
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