Answer the following question given this paragraph: Currents also flow deep below the surface of the ocean. Deep currents are caused by differences in density at the top and bottom. More dense water takes up less space than less dense water. It has the same mass but less volume. Water that is more dense sinks. Less dense water rises. What can make water more dense?. Q: What is caused by differences in density at the top and bottom of the ocean? Choices: - shallow currents - still water - flat currents - deep currents A:
deep currents
Answer the following question given this paragraph: The combined gas law shows the relationships among temperature, volume, and pressure. Q: What law shows the relationships among temperature, volume, and pressure? Choices: - Newton's law - Murphy's Law - Law of Conservation - combined gas A:
combined gas
Q: Answer the following question given this paragraph: Internal Respiration Internal respiration is gas exchange that occurs at the level of body tissues (Figure 22.23). Similar to external respiration, internal respiration also occurs as simple diffusion due to a partial pressure gradient. However, the partial pressure gradients are opposite of those present at the respiratory membrane. The partial pressure of oxygen in tissues is low, about 40 mm Hg, because oxygen is continuously used for cellular respiration. In contrast, the partial pressure of oxygen in the blood is about 100 mm Hg. This creates a pressure gradient that causes oxygen to dissociate from hemoglobin, diffuse out of the blood, cross the interstitial space, and enter the tissue. Hemoglobin that has little oxygen bound to it loses much of its brightness, so that blood returning to the heart is more burgundy in color. Considering that cellular respiration continuously produces carbon dioxide, the partial pressure of carbon dioxide is lower in the blood than it is in the tissue, causing carbon dioxide to diffuse out of the tissue, cross the interstitial fluid, and enter the blood. It is then carried back to the lungs either bound to hemoglobin, dissolved in plasma, or in a converted form. By the time blood returns to the heart, the partial pressure of oxygen has returned to about 40 mm Hg, and the partial pressure. Q: Internal and external forms of what life process occur as simple diffusion due to a partial pressure gradient? Choices: - reproduction - metabolism - photosynthesis - respiration A:
A: respiration
Question: Answer the following question given this paragraph: The lowest latitudes get the most energy from the Sun. The highest latitudes get the least. Q: Which latitudes get the most energy from the sun? Choices: - middle latitudes - highest latitudes - polular latitudes - lowest latitudes A:
Answer: lowest latitudes
*Question*
Answer the following question given this paragraph: London interactions c. London dispersion forces Hydrophilic and Hydrophobic Solutes A solute can be classified as hydrophilic (literally, "water loving"), meaning that it has an electrostatic attraction to water, or hydrophobic ("water fearing"), meaning that it repels water. A hydrophilic substance is polar and often contains OH or NH groups that can form hydrogen bonds to water. For example, glucose with its five OH groups is hydrophilic. In contrast, a hydrophobic substance may be polar but usually contains CH bonds that do not interact favorably with water, as is the case with naphthalene and n-octane. Hydrophilic substances tend to be very soluble in water and other strongly polar solvents, whereas hydrophobic substances are essentially insoluble in water and soluble in nonpolar solvents such as benzene and cyclohexane. The difference between hydrophilic and hydrophobic substances has substantial consequences in biological systems. For example, vitamins can be classified as eitherfat soluble or water soluble. Fatsoluble vitamins, such as vitamin A, are mostly nonpolar, hydrophobic molecules. As a result, they tend to be absorbed into fatty tissues and stored there. In contrast, water-soluble vitamins, such as vitamin C, are polar, hydrophilic molecules that circulate in the blood and intracellular fluids, which are primarily aqueous. Water-soluble vitamins are therefore excreted much more rapidly from the body and must be replenished in our daily diet. A comparison of the chemical structures of vitamin A and vitamin C quickly reveals why one is hydrophobic and the other hydrophilic. Q: What term is used to describe a solute that is water fearing? Choices: - claustrophobic - anti-hydral - hydrogenic - hydrophobic A:
**Answer**
hydrophobic
Answer the following question given this paragraph: For a hypothesis to be testable means that it is possible to make observations that agree or disagree with it. If a hypothesis cannot be tested by making observations, it is not scientific. Consider this statement:. Q: A hypothesis is scientific only if it can be tested by what? Choices: - independent variable - making a conclusion - carbon dating - making observations A:
making observations