Answer the following question given this paragraph: The use of nuclear fusion for energy has several pros. Unlike nuclear fission, which involves dangerous radioactive elements, nuclear fusion involves just hydrogen and helium. These elements are harmless. Hydrogen is also very plentiful. There is a huge amount of hydrogen in ocean water. The hydrogen in just a gallon of water could produce as much energy by nuclear fusion as burning 1,140 liters (300 gallons) of gasoline! The hydrogen in the oceans would generate enough energy to supply all the world's people for a very long time. Q: Hydrogen and helium are specifically involved as reactants in what nuclear reaction that is useful for making energy? Choices: - destructive fusion - radioactive fusion - nuclear fission - nuclear fusion A:
nuclear fusion
(Question)
Answer the following question given this paragraph: Quantities in science may be very large or very small. This usually requires many zeroes to the left or right of the decimal point. Such numbers can be hard to read and write accurately. That's where scientific notation comes in. Scientific notation is a way of writing very large or small numbers that uses exponents. Numbers are written in this format:. Q: What term is defined as a way of writing very large or small numbers that uses exponents? Choices: - certain notation - exponential notation - quadratic notation - scientific notation A:
(Answer)
scientific notation
Ques: Answer the following question given this paragraph: Skydivers are pulled towards the Earth by gravity. Gravity exerts a force on the skydivers. A force is a push or pull. Some pushes and pulls can be seen. Q: What pulls skydivers towards the earth? Choices: - momentum - impact - inertia - gravity A:
Ans: gravity
(Q).
Answer the following question given this paragraph: Breathing certainly is a major contribution to your health! Without breathing, we could not survive. Curiously, the act of breathing itself is little more than an application of Boyle's law. The lungs are a series of ever-narrowing tubes that end in a myriad of tiny sacs called alveoli. It is in the alveoli that oxygen from the air transfers to the bloodstream and carbon dioxide from the bloodstream transfers to the lungs for exhalation. For air to move in and out of the lungs, the pressure inside the lungs must change, forcing the lungs to change volumejust as predicted by Boyle's law. The pressure change is caused by the diaphragm, a muscle that covers the bottom of the lungs. When the diaphragm moves down, it expands the size of our lungs. When this happens, the air pressure inside our lungs decreases slightly. This causes new air to rush in, and we inhale. The pressure decrease is slightonly 3 torr, or about 0.4% of an atmosphere. We inhale only 0.51.0 L of air per normal breath. Exhaling air requires that we relax the diaphragm, which pushes against the lungs and slightly decreases the volume of the lungs. This slightly increases the pressure of the air in the lungs, and air is forced out; we exhale. Only 12 torr of extra pressure is needed to exhale. So with every breath, our own bodies are performing an experimental test of Boyle's law. Q: The lungs are a series of ever-narrowing tubes that end in a myriad of tiny sacs called what? Choices: - brachii - testes - glands - alveoli A:
(A).
alveoli
Ques:Answer the following question given this paragraph: DNA consists of two long chains of nucleotides. Nitrogen bases on the two chains form hydrogen bonds with each other. Adenine always bonds with thymine, and guanine always bonds with cytosine. These bonds hold the two chains together and give DNA is characteristic double helix, or spiral, shape. You can see the shape of the DNA molecule in Figure below . Sugars and phosphate groups form the "backbone" of each chain of DNA. The bonded bases are called base pairs. RNA, in contrast to DNA, consists of just one chain of nucleotides. Determining the structure of DNA was a big scientific breakthrough. You can read the interesting story of its discovery at the URL below. Q: Dna consists of how many long chains of nucleotides? Choices: - three - zero - one - two A:

Ans:two
Answer the following question given this paragraph: Substances that are polar experience dipole-dipole interactions. Q: What kind of interactions do polar substances experience? Choices: - monopole-dipole interactions - axial interactions - monopole-monopole interactions - dipole-dipole interactions A:
dipole-dipole interactions