*Question*
Answer the following question given this paragraph: A: During the day, thermal energy is transferred from the air over the land to the air over the water. During the night, thermal energy is transferred in the opposite direction. Q: During the day, what type of energy is transferred from the air over the land to the air over the water? Choices: - magnetic - atmospheric - nuclear - thermal A:
**Answer**
thermal

*Question*
Answer the following question given this paragraph: Figure 20.33 The outer surface of the heart changes from positive to negative during depolarization. This wave of depolarization is spreading from the top of the heart and is represented by a vector pointing in the direction of the wave. This vector is a voltage (potential difference) vector. Three electrodes, labeled RA, LA, and LL, are placed on the patient. Each pair (called leads I, II, and III) measures a component of the depolarization vector and is graphed in an ECG. Q: The outer surface of the heart changes from positive to negative during what? Choices: - inflammation - permeability - reproduction - depolarization A:
**Answer**
depolarization

*Question*
Answer the following question given this paragraph: Why must hadrons be white? The color scheme is intentionally devised to explain why baryons have three quarks and mesons have a quark and an antiquark. Quark color is thought to be similar to charge, but with more values. An ion, by analogy, exerts much stronger forces than a neutral molecule. When the color of a combination of quarks is white, it is like a neutral atom. The forces a white particle exerts are like the polarization forces in molecules, but in hadrons these leftovers are the strong nuclear force. When a combination of quarks has color other than white, it exerts extremely large forceseven larger than the strong forceand perhaps cannot be stable or permanently separated. This is part of the theory of quark confinement, which explains how quarks can exist and yet never be isolated or directly observed. Finally, an extra quantum number with three values (like those we assign to color) is necessary for quarks to obey the Pauli exclusion principle. Particles such as the , which is ++ composed of three strange quarks, sss , and the , which is three up quarks, uuu, can exist because the quarks have different colors and do not have the same quantum numbers. Color is consistent with all observations and is now widely accepted. Quark theory including color is called quantum chromodynamics (QCD), also named by Gell-Mann. Q: Quantum chromodynamics combines what property with quark theory? Choices: - mass - contrast - sound - color A:
**Answer**
color

*Question*
Answer the following question given this paragraph: Take a close look at this gorilla hand. The similarities to a human hand are remarkable. Comparing anatomy, and characterizing the similarities and differences, provides evidence of evolution. Q: Comparing anatomy, and characterizing the similarities and differences, provides evidence of what process? Choices: - regression - devolution - emergence - evolution A:
**Answer**
evolution