Answer the following question given this paragraph: Q: What is the natural selection that favors altruistic behavior by enhancing reproductive success of relatives known as? Choices: - diversifying selection - directional selection - stabilizing selection - kin selection A:
kin selection
Answer the following question given this paragraph: The ocean basin begins where the ocean meets the land. The continental margin begins at the shore and goes down to the ocean floor. It includes the continental shelf, slope, and rise. The continental shelf is part of the continent, but it is underwater today. It is about 100-200 meters deep, much shallower than the rest of the ocean. The continental shelf usually goes out about 100 to 200 kilometers from the shore ( Figure below ). Q: The ocean basin begins where the ocean meets what? Choices: - sea - bay - river - land A:
land
Q: Answer the following question given this paragraph: As we saw when we studied States of Matter , the driving force for particles in the liquid phase to escape into the gas phase depends on both the temperature and identity of the substance. The vapor pressure of a liquid is a measure of this ability. Specifically, vapor pressure is the pressure exerted by a vapor that is in equilibrium with its solid or liquid phase. For substances with a stronger drive to enter the gas phase, more vapor particles will be present in the same amount of space, resulting in a higher pressure. At a given temperature, the vapor pressures of various liquids depends primarily on the strength of intermolecular attractions between individual particles. Figure below shows the relative vapor pressures of several different substances. Q: The vapor pressures of various liquids depends primarily on the strength of what kind of attractions between individual particles? Choices: - diffusion - gravitational - outer molecular - intermolecular A:
A: intermolecular
Question: Answer the following question given this paragraph: Although the masses of the electron, the proton, and the neutron are known to a high degree of precision (Table 1.3 "Properties of Subatomic Particles*"), the mass of any given atom is not simply the sum of the masses of its electrons, protons, and neutrons. For example, the ratio of the masses of 1H (hydrogen) and 2H (deuterium) is actually 0.500384, rather than 0.49979 as predicted from the numbers of neutrons and protons present. Although the difference in mass is small, it is extremely important because it is the source of the huge amounts of energy released in nuclear reactions (Chapter 20 "Nuclear Chemistry"). Because atoms are much too small to measure individually and do not have a charge, there is no convenient way to accurately measure absolute atomic masses. Scientists can measure relative atomic masses very accurately, however, using an instrument called a mass spectrometer. The technique is conceptually similar to the one Thomson used to determine the mass-to-charge ratio of the electron. First, electrons are removed from or added to atoms or molecules, thus producing charged particles called ions. When an electric field is applied, the ions are accelerated into a separate chamber where they are deflected from their initial trajectory by a magnetic field, like the electrons in Thomson's experiment. The extent of the deflection depends on the mass-to-charge ratio of the ion. By measuring the relative deflection of ions that have the same charge, scientists can determine their relative masses (Figure 1.25 "Determining Relative Atomic Masses Using a Mass Spectrometer"). Thus it is not possible to calculate absolute atomic masses accurately by simply adding together the masses of the electrons, the protons, and the neutrons, and absolute atomic masses cannot be measured, but relative masses can be measured very accurately. It is actually rather common in chemistry to encounter a quantity whose magnitude can be measured only relative to some other quantity, rather than absolutely. We will encounter... Q: What is a mass spectrometer used to measure? Choices: - partial atomic masses - subatomic masses - optical atomic masses - relative atomic masses A:
Answer: relative atomic masses
*Question*
Answer the following question given this paragraph: Learning is a change in behavior that occurs as a result of experience. Q: What word describes a change in behavior that occurs as a result of experience? Choices: - taking - heredity - applying - learning A:
**Answer**
learning
(Q).
Answer the following question given this paragraph: Bronze, an alloy of copper and tin, has been in use since ancient times. The Bronze Age saw the increased use of metals rather than stone for weapons, tools, and decorative objects. Brass, an alloy of copper and zinc, is widely used in musical instruments like the trumpet and trombone. Q: What is an alloy of copper and tin? Choices: - zinc - gold - silver - bronze A:
(A).
bronze