Answer the following question given this paragraph: Much of the iron produced is refined and converted into steel. Steel is made from iron by removing impurities and adding substances such as manganese, chromium, nickel, tungsten, molybdenum, and vanadium to produce alloys with properties that make the material suitable for specific uses. Most steels also contain small but definite percentages of carbon (0.04%2.5%). However, a large part of the carbon contained in iron must be removed in the manufacture of steel; otherwise, the excess carbon would make the iron brittle. Q: Much of the iron produced is refined and converted into what? Choices: - plastic - wood - sugar - steel A:
steel
Answer the following question given this paragraph: Burning and other changes in matter do not destroy matter. The mass of matter is always the same before and after the changes occur. Q: How does burning matter affect its mass? Choices: - the mass quadruples - the mass increases - the mass decreases - the mass remains the same A:
the mass remains the same
Q: Answer the following question given this paragraph: Proteins are biochemical compounds that consist of one or more chains of small molecules called amino acids. Amino acids are the monomers of proteins. There are only about 20 different amino acids. The sequence of amino acids in chains and the number of chains in a protein determine the protein's shape. Shapes may be very complex. You can learn more about the shapes of proteins at this link:. Q: What is the name for biochemical compounds that consist of one or more chains of small molecules called amino acids? Choices: - lipids - protons - hormones - proteins A:
A: proteins
Question: Answer the following question given this paragraph: In physics, resistance is opposition to the flow of electric charges in an electric current as it travels through matter. The SI unit for resistance is the ohm. Resistance occurs because moving electrons in current bump into atoms of matter. Resistance reduces the amount of electrical energy that is transferred through matter. That's because some of the electrical energy is absorbed by the atoms and changed to other forms of energy, such as heat. You can see an animation of resistance at the level of atoms and electrons at this URL: http://www. physics. org/explorelink. asp?id=1738&q=electricalresistance&currentpage=1&age=0&knowledge=0&item=3. Q: In physics, resistance is opposition to the flow of what? Choices: - temperature charges - capacitance - surface flow - electrical charges A:
Answer: electrical charges
*Question*
Answer the following question given this paragraph: Radon is also radioactive and can easily be inhaled into the lungs. Over time, this internal radon exposure can lead to the development of lung cancer. The incidence of lung cancer in smokers exposed to radon is much higher than that in non-smokers exposed to radon since smoking has already produced some lung damage, and the radon simply makes the damage worse. Radon exposure is highest in homes lacking good air circulation to move the gas out of the residence. There are a number of inexpensive approaches to decreasing your exposure to radon. A good start is to test your living area for radon with a radon test kit. Q: Smoking increases the risk of cancer from what radioactive gas that can also be detected with a test kit for your home? Choices: - arsenic - carbon monoxide - carbon dioxide - radon A:
**Answer**
radon
(Q).
Answer the following question given this paragraph: A vesicle. Because vesicles are made of phospholipids, they can break off of and fuse with other membraneous material. This allows them to serve as small transport containers, moving substances around the cell and to the cell membrane. Q: What are vesicles made of? Choices: - cells - membranes - filaments - phospholipids A:
(A).
phospholipids