Answer the following question given this paragraph: Did you ever see a cat chase after a laser light, like the one in Figure below ? A laser is a device that produces a very focused beam of visible light of just one wavelength and color. Waves of laser light are synchronized so the crests and troughs of the waves line up. The diagram in Figure below shows why a beam of laser light is so focused compared with ordinary light from a flashlight. Q: What do you call a device that produces a very focused beam of visible light of just one wavelength and color? Choices: - optical diffuser - fusion relay - light meter - laser A:
laser
(Question)
Answer the following question given this paragraph: Recall that the four different sublevels (s, p, d, and f) each consist of a different number of orbitals. The s sublevel has one orbital, the p sublevel has three orbitals, the d sublevel has five orbitals, and the f sublevel has seven orbitals. In the first period, only the 1s sublevel is being filled. Since all orbitals can hold two electrons, the entire first period consists of just two elements. In the second period, the 2s sublevel, with two electrons, and the 2p sublevel, with six electrons, are being filled. Consequently, the second period contains eight elements. The third period is similar to the second, except the 3s and 3p sublevels are being filled. Because the 3d sublevel does not fill until after the 4s sublevel, the fourth period contains 18 elements, due to the 10 additional electrons that can be accommodated by the 3d orbitals. The fifth period is similar to the fourth. After the 6s sublevel fills, the 4f sublevel is populated with up to 14 electrons. This is followed by the 5d and the 6p sublevels. The total number of elements in the sixth period is 32. The seventh period also contains 32 elements, most of which are too unstable to be found in nature. All 32 have been detected or synthesized, although for some of the later elements in this period, only a handful of atoms have ever been made. Q: All members of a species living together form a what? Choices: - family - group - organization - population A:
(Answer)
population
Ques: Answer the following question given this paragraph: A kidney stone. The stones can form anywhere in the urinary system. Q: Kidney stones can form anywhere in what system? Choices: - digestive - respiratory - intestinal - urinary A:
Ans: urinary
(Q).
Answer the following question given this paragraph: The lithosphere is made of the rigid, brittle, solid crust and uppermost mantle. Q: Which part of the earth is made of the rigid, brittle, solid crust and uppermost mantle? Choices: - troposphere - thermosphere - atmosphere - lithosphere A:
(A).
lithosphere
Ques:Answer the following question given this paragraph: The most famous mass extinction was 65 million years ago. Between the Mesozoic Era and the Cenozoic Era, about 50% of all animal species died off. This mass extinction is when the dinosaurs became extinct. Most scientists think that the extinction was caused by a giant meteorite that struck Earth. The impact heated the atmosphere until it became as hot as a kitchen oven. Animals roasted. Dust flew into the atmosphere and blocked sunlight for a year or more. This caused a deep freeze and ended photosynthesis. Sulfur from the impact mixed with water in the atmosphere. The result was acid rain. The rain dissolved the shells of the tiny marine plankton that form the base of the food chain. With little food being produced, animals starved. Q: About 50% of all animal species died off between the mesozoic and which other era? Choices: - jurassic - precambrian - cretaceous - cenozoic A:

Ans:cenozoic
Answer the following question given this paragraph: The mode is the most common value. It is the value that occurs most often. Q: The value that occurs most often in a data set is called the? Choices: - median - mean - type - mode A:
mode