Answer the following question given this paragraph: When you use a machine, you apply force to the machine. This force is called the input force. The machine, in turn, applies force to an object. This force is called the output force. The output force may or may not be the same as the input force. The force you apply to the machine is applied over a given distance, called the input distance. The force applied by the machine to the object is also applied over a distance, called the output distance. The output distance may or may not be the same as the input distance. Q: What do you call the force a machine applies to an object? Choices: - premium force - drop force - optimal force - output force A:
output force
(Question)
Answer the following question given this paragraph: The water supply can be harmed in two major ways. The water can be polluted, and it can be overused. Protecting the water supply must address both problems. We need to reduce how much pollution ends up in the water supplykeeping water from being polluted is easier and cheaper than cleaning it. We need to treat water that's already polluted. We need to conserve water by using less. Q: What's the best way humans can conserve water? Choices: - boil it - use more - salt it - use less A:
(Answer)
use less
Ques: Answer the following question given this paragraph: Emigration is the movement of individuals out of a population. This decreases the population size and growth rate. Q: What is the term for the movement of individuals out of a population? Choices: - succession - colonization - immigration - emigration A:
Ans: emigration
(Q).
Answer the following question given this paragraph: Q: What manages the material and energy resources of the cell? Choices: - cell wall - respiration - nucleus - metabolism A:
(A).
metabolism
Ques:Answer the following question given this paragraph: Structures of the Nonmetals The structures of the nonmetals differ dramatically from those of metals. Metals crystallize in closely packed arrays that do not contain molecules or covalent bonds. Nonmetal structures contain covalent bonds, and many nonmetals consist of individual molecules. The electrons in nonmetals are localized in covalent bonds, whereas in a metal, there is delocalization of the electrons throughout the solid. The noble gases are all monatomic, whereas the other nonmetal gaseshydrogen, nitrogen, oxygen, fluorine, and chlorinenormally exist as the diatomic molecules H2, N2, O2, F2, and Cl2. The other halogens are also diatomic; Br2 is a liquid and I2 exists as a solid under normal conditions. The changes in state as one moves down the halogen family offer excellent examples of the increasing strength of intermolecular London forces with increasing molecular mass and increasing polarizability. Oxygen has two allotropes: O2, dioxygen, and O3, ozone. Phosphorus has three common allotropes, commonly referred to by their colors: white, red, and black. Sulfur has several allotropes. There are also many carbon allotropes. Most people know of diamond, graphite, and charcoal, but fewer people know of the recent discovery of fullerenes, carbon nanotubes, and graphene. Descriptions of the physical properties of three nonmetals that are characteristic of molecular solids follow. Q: Nonmetal structures contain what type of bonds? Choices: - prevalent - polymeric - gravitational - covalent A:

Ans:covalent
Answer the following question given this paragraph: Notice the differences in the species' beaks in Figure 18.13. Evolution in response to natural selection based on specific food sources in each new habitat led to evolution of a different beak suited to the specific food source. The seed-eating bird has a thicker, stronger beak which is suited to break hard nuts. The nectar-eating birds have long beaks to dip into flowers to reach the nectar. The insect-eating birds have beaks like swords, appropriate for stabbing and impaling insects. Darwin's finches are another example of adaptive radiation in an archipelago. Q: Evolutionary adaptation is evidenced by different shapes of what structures in birds with different food preferences? Choices: - claws - Stomach - necks - beaks A:
beaks