Answer the following question given this paragraph: The exothermic reaction on the left releases energy. The endothermic reaction on the right consumes energy. Q: What do you call a reaction that consumes energy as it is carried out? Choices: - autotrophic - exothermic - unstable - endothermic A:
endothermic
(Question)
Answer the following question given this paragraph: Early Accelerators An early accelerator is a relatively simple, large-scale version of the electron gun. The Van de Graaff (named after the Dutch physicist), which you have likely seen in physics demonstrations, is a small version of the ones used for nuclear research since their invention for that purpose in 1932. For more, see Figure 33.7. These machines are electrostatic, creating potentials as great as 50 MV, and are used to accelerate a variety of nuclei for a range of experiments. Energies produced by Van de Graaffs are insufficient to produce new particles, but they have been instrumental in exploring several aspects of the nucleus. Another, equally famous, early accelerator is the cyclotron, invented in 1930 by the American physicist, E. Lawrence (19011958). For a visual representation with more detail, see Figure 33.8. Cyclotrons use fixed-frequency alternating electric fields to accelerate particles. The particles spiral outward in a magnetic field, making increasingly larger radius orbits during acceleration. This clever arrangement allows the successive addition of electric potential energy and so greater particle energies are possible than in a Van de Graaff. Lawrence was involved in many early discoveries and in the promotion of physics programs in American. Q: Named after the dutch physicist, the van de graaff is a type of what device used for nuclear research? Choices: - radiation detector - electromagnetic - barometer - accelerator A:
(Answer)
accelerator
Ques: Answer the following question given this paragraph: The lens of the eye is a convex lens. It fine-tunes the focus so an image forms on the retina at the back of the eye. Tiny muscles control the shape of the lens to focus images of close or distant objects. Q: What shape is the lens of the eye? Choices: - spherical - angular - concave - convex A:
Ans: convex
(Q).
Answer the following question given this paragraph: Pluto and its moon, Charon, are actually two objects. Q: What is the name of pluto's moon? Choices: - Phobos - Titania - Europa - charon A:
(A).
charon
Ques:Answer the following question given this paragraph: At the top of the stratosphere is a thin layer called the stratopause. It acts as a boundary between the stratosphere and the mesosphere. Q: What is the name of the thin layer that acts as a boundary between the stratosphere and the mesosphere? Choices: - spirogyra - ozone layer - spicule - stratopause A:

Ans:stratopause
Ques:Answer the following question given this paragraph: The best-known method of radiometric dating is carbon-14 dating . A living thing takes in carbon-14 (along with stable carbon-12). As the carbon-14 decays, it is replaced with more carbon-14. After the organism dies, it stops taking in carbon. That includes carbon-14. The carbon-14 that is in its body continues to decay. So the organism contains less and less carbon-14 as time goes on. We can estimate the amount of carbon-14 that has decayed by measuring the amount of carbon-14 to carbon-12. We know how fast carbon-14 decays. With this information, we can tell how long ago the organism died. Q: Carbon-14 dating is a method of what kind of dating? Choices: - orbital - stratigraphy - metamorphic - radiometric A:

Ans:
radiometric