Answer the following question given this paragraph: A carcinogen is anything that causes cancer. Most carcinogens produce mutations in genes that control the cell cycle. Q: What is anything that causes cancer called? Choices: - chemical - pesticide - bacteria - carcinogen A:
carcinogen
(Question)
Answer the following question given this paragraph: Crossing charges. One method for obtaining subscripts in the empirical formula is by crossing charges. When crossing charges, you will sometimes find it necessary to reduce the subscripts to their simplest ratio to write the empirical formula. Consider, for example, the compound formed by Mg2+ and O2. Using the absolute values of the charges on the ions as subscripts gives the formula Mg2O2:. Q: Crossing charges is one method for obtaining what? Choices: - notations - superscripts - hybrids - subscripts A:
(Answer)
subscripts
Ques: Answer the following question given this paragraph: Have your parents ever put corn in the gas tank of their car? They did if they used gas containing ethanol. Ethanol is produced by alcoholic fermentation of the glucose in corn or other plants. This type of fermentation also explains why bread dough rises. Yeasts in bread dough use alcoholic fermentation and produce carbon dioxide gas. The gas forms bubbles in the dough, which cause the dough to expand. The bubbles also leave small holes in the bread after it bakes, making the bread light and fluffy. Do you see the small holes in the slice of bread in Figure below ?. Q: What type of gas is produced by alcoholic fermentation of the glucose in corn or other plants? Choices: - methanol - ethyl - isopropyl - ethanol A:
Ans: ethanol
(Q).
Answer the following question given this paragraph: If you are a typical teenager, you like to eat. For your body to break down, absorb and spread the nutrients from your food throughout your body, your digestive system and endocrine system need to work together. The endocrine system sends hormones around your body to communicate between cells. Essentially, hormones are chemical messenger molecules. Q: What are the "chemical messenger" molecules used by the endocrine system? Choices: - acids - axons - enzymes - hormones A:
(A).
hormones
Ques:Answer the following question given this paragraph: Metals tend to be malleable. This means that they can be formed into thin sheets without breaking. An example is aluminum foil, also pictured in the Figure below . Q: What is an element that tend to be malleable? Choices: - actinide - mixture - lanthanide - metal A:

Ans:metal
Answer the following question given this paragraph: Sonar uses ultrasound in a way that is similar to echolocation. Sonar stands for so und na vigation and r anging. It is used to locate underwater objects such as sunken ships or to determine how deep the water is. A sonar device is usually located on a boat at the surface of the water. The device is both a sender and a receiver (see Figure below ). It sends out ultrasound waves and detects reflected waves that bounce off underwater objects or the bottom of the water. If you watch the video at the URL below, you can see how sonar is used on a submarine. Q: What tool, used to locate underwater objects, utilizes ultrasound in a way that is similar to echolocation? Choices: - GPS - radar - scanning - sonar A:
sonar