Ques:Answer the following question given this paragraph: Radioactivity was discovered in 1896 by a French physicist named Antoine Henri Becquerel. Becquerel was experimenting with uranium, which glows after being exposed to sunlight. Becquerel wanted to see if the glow was caused by rays of energy, like rays of light and X-rays. He placed a bit of uranium on a photographic plate. The plate was similar to film that's used today to take X-rays. You can see an example of an X-ray in Figure below . As Becquerel predicted, the uranium left an image on the photographic plate. This meant that uranium gives off rays after being exposed to sunlight. Q: Name the physicist who discovered radioactivity? Choices: - louis pasteur - neal degrasse tyson - albert einstein - antoine henri becquerel A:

Ans:antoine henri becquerel
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Ques:Answer the following question given this paragraph: Besides water, most of the compounds in living things are biochemical compounds. A biochemical compound is a carbon-based compound that is found in living organisms. Carbon is an element that has a tremendous ability to form large compounds. Each atom of carbon can form four chemical bonds with other atoms. A chemical bond is the sharing of electrons between atoms. Bonds hold the atoms together in chemical compounds. A carbon atom can form bonds with other carbon atoms or with atoms of other elements. Q: What element is a biochemical compound based on? Choices: - hydrogen - nitrogen - oxygen - carbon A:

Ans:carbon
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Ques:Answer the following question given this paragraph: cell that transmits electrical impulses in the nervous system; commonly called nerve cell. Q: What type of cell transmits electrical impulses in the nervous system? Choices: - toxin cell - Large Cell - trace cell - nerve cell A:

Ans:nerve cell
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Ques:Answer the following question given this paragraph: We learned in the previous concept, "Scientific Explanations and Interpretations," that the average global temperature has been on the rise. Scientists know that carbon dioxide is a greenhouse gas . Greenhouse gases trap heat in the atmosphere. This leads us to a question:. Q: Where do greenhouse gases trap heat? Choices: - ground - space - altitude - atmosphere A:

Ans:
atmosphere
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