Answer the following question given this paragraph: Q: What is the terme for water vapor changing to liquid water? Choices: - evaporation - transubstantiation - freezing - condensation A:
condensation
Answer the following question given this paragraph: As mentioned earlier, echinoderms show radial symmetry. Other key echinoderm features include an internal skeleton and spines, as well as a few organs and organ systems. Although echinoderms look like they have a hard exterior, they do not have an external skeleton. Instead, a thin outer skin covers an internal skeleton made of tiny plates and spines. This provides rigid support. Some groups of echinoderms, such as sea urchins ( Figure below ), have spines that protect the organism. Sea cucumbers use these spines to help them move. Q: What type of symmetry do echinoderms show? Choices: - mirrored - lateral - parallel - radial A:
radial
Q: Answer the following question given this paragraph: Visible light is one type of electromagnetic radiation , which is a form of energy that exhibits wavelike behavior as it moves through space. Other types of electromagnetic radiation include gamma rays, x-rays, ultraviolet light, infrared light, microwaves, and radio waves. The figure below shows the electromagnetic spectrum , which is all forms of electromagnetic radiation. Notice that visible light makes up only a very, very small portion of the entire electromagnetic spectrum. All electromagnetic radiation moves through a vacuum at a constant speed of 2.998 10 8 m/s. While the presence of air molecules slows the speed of light by a very small amount, we will use the value of 3.00 10 8 m/s as the speed of light in air. Q: Visible light is one type of this radiation? Choices: - neutron - Ionizing - Gamma - electromagnetic A:
A: electromagnetic
Question: Answer the following question given this paragraph: Cellular respiration occurs in the mitochondria. Figure 20.13 "Respiration" shows the mitochondrion's two membranes: outer andinner. The inner membrane is extensively folded into a series of internal ridges calledcristae. Thus there are two compartments in mitochondria: the intermembrane space, which lies between the membranes, and the matrix, which lies inside the inner membrane. Q: What part of the cell does cellular respiration occur? Choices: - glucose - proton - nuclei - mitochondria A:
Answer: mitochondria
*Question*
Answer the following question given this paragraph: Large or small numbers are expressed in scientific notation, which use powers of 10. Q: Large or small numbers are expressed in scientific notation, which use powers of this? Choices: - 2 - 4 - 16 - 10 A:
**Answer**
10
(Q).
Answer the following question given this paragraph: One way to keep iron from corroding is to keep it painted. The layer of paint prevents the water and oxygen necessary for rust formation from coming into contact with the iron. As long as the paint remains intact, the iron is protected from corrosion. Other strategies include alloying the iron with other metals. For example, stainless steel is mostly iron with a bit of chromium. The chromium tends to collect near the surface, where it forms an oxide layer that protects the iron. Zinc-plated or galvanized iron uses a different strategy. Zinc is more easily oxidized than iron because zinc has a lower reduction potential. Since zinc has a lower reduction potential, it is a more active metal. Thus, even if the zinc coating is scratched, the zinc will still oxidize before the iron. This suggests that this approach should work with other active metals. Another important way to protect metal is to make it the cathode in a galvanic cell. This is cathodic protection and can be used for metals other than just iron. For example, the rusting of underground iron storage tanks and pipes can be prevented or greatly reduced by connecting them to a more active metal such as zinc or magnesium (Figure 17.18). This is also used to protect the metal parts in water heaters. The more active metals (lower reduction potential) are called sacrificial anodes because as they get used up as they corrode (oxidize) at the anode. The metal being protected serves as the cathode, and so does not oxidize (corrode). When the anodes are properly monitored and periodically replaced, the useful lifetime of the iron storage tank can be greatly extended. Q: Zinc is more easily oxidized than iron because zinc has a lower reduction potential. since zinc has a lower reduction potential, it is a more what? Choices: - much metal - Trap metal - usually metal - active metal A:
(A).
active metal