Answer the following question given this paragraph: Metalloids are elements that have properties of both metals and nonmetals. Some can conduct electricity but only at certain temperatures. They may be shiny but brittle. All metalloids are solids at room temperature. Q: Elements that specifically are noted to have properties of both metals and nonmetals are known as what? Choices: - compund metals - alloys - alkali metals - metalloids A:
metalloids
Answer the following question given this paragraph: Artificial Selection: Humans used artificial selection to create these different breeds. Both dog breeds are descended from the same wolves, and their genes are almost identical. Q: Humans create different breeds of organisms using what kind of selection? Choices: - speciation - biased selection - natural selection - artificial selection A:
artificial selection
Q: Answer the following question given this paragraph: In birds, 90% to 95% of species are monogamous , meaning the male and female remain together for breeding for a few years or until one mate dies. Birds of all types, from parrots to eagles and falcons, are monogamous. Usually, the parents take turns incubating the eggs. Birds usually incubate their eggs after the last one has been laid. In polygamous species, where there is more than one mate, one parent does all of the incubating. The wild turkey is an example of a polygamous bird. Q: Most bird species display this behavior, meaning the male and female remain together for breeding for a few years or until one mate dies? Choices: - dichotomy - polygamy - isolation - monogamy A:
A: monogamy
Question: Answer the following question given this paragraph: Figure 28.18 Momentum is an important concept for these football players from the University of California at Berkeley and the University of California at Davis. Players with more mass often have a larger impact because their momentum is larger. For objects moving at relativistic speeds, the effect is even greater. (credit: John Martinez Pavliga). Q: Why do players with more mass often have a larger impact in football? Choices: - potential energy is lower - kinetic energy is lower - Velocity is larger - momentum is larger A:
Answer: momentum is larger
*Question*
Answer the following question given this paragraph: There are many other nervous system diseases. They include multiple sclerosis, Huntington's disease, Parkinson's disease, and Alzheimer's disease. However, these diseases rarely, if ever, occur in young people. Their causes and symptoms are listed below ( Table below ). The diseases have no known cure, but medicines may help control their symptoms. Q: Multiple sclerosis, huntington's disease, parkinson's disease, and alzheimer's disease are example of diseases of which body system? Choices: - muscular system - lymphatic system - circulatory system - nervous system A:
**Answer**
nervous system
*Question*
Answer the following question given this paragraph: tension causes liquids to form spheres in free fall or zero gravity (see - ball-ch10_s02_f01: the "floating" water isn't in the shape of a sphere by accident; it is the result of surface tension). Surface tension is also responsible for the fact that small insects can "walk" on water. Because of surface tension, it takes energy to break the surface of a liquid, and if an object (such as an insect) is light enough, there is not enough force due to gravity for the object to break through the surface, so the object stays on top of the water ( ball-ch10_s03_f07). Carefully done, this phenomenon can also be illustrated with a thin razor blade or a paper clip. The fact that small droplets of water bead up on surfaces does not mean that wateror any other liquid does not interact with other substances. Sometimes the attraction can be very strong. Adhesion is the tendency of a substance to interact with other substances because of intermolecular forces, while cohesion is the tendency of a substance to interact with itself. If cohesive forces within a liquid are stronger than adhesive forces between a liquid and another substance, then the liquid tends to keep to itself; it will bead up. However, if adhesive forces between a liquid and another substance are stronger than cohesive forces, then the liquid will spread out over the other substance, trying to maximize the interface between the other substance and the liquid. We say that the liquid wets the other substance. Adhesion and cohesion are important for other phenomena as well. In particular, if adhesive forces are strong, then when a liquid is introduced to a small-diameter tube of another substance, the liquid moves up or down in the tube, as if ignoring gravity. Because tiny tubes are called capillaries, this phenomenon is called capillary action. For example, one type of capillary actioncapillary riseis seen when water or water-based liquids rise up in thin glass tubes (like the capillaries sometimes used in blood tests), forming an upwardly curved surface... Q: Surface tension is responsible for the fact that small insects can do this on water? Choices: - swim - sink - float - walk A:
**Answer**
walk