(Q).
Q: What types of drugs affect the brain and influence how a person can feel, think, or act? Read this paragraph and choose the correct option from the provided answers: Many drugs affect the brain and influence how a person feels, thinks, or acts. Such drugs are called psychoactive drugs. They include legal drugs such as caffeine and alcohol, as well as illegal drugs such as cocaine and heroin. They also include certain medicines, such as antidepressant drugs and medical marijuana. Choices: - antibiotics - analgesics - prescription - psychoactive A:
(A).
psychoactive

(Q).
Q: What kind of reactions between an acid and a base yield a salt and water? Read this paragraph and choose the correct option from the provided answers: Neutralization reactions between an acid and a base yield a salt and water. In some cases, this results in a completely neutral solution. However, some salts are weakly acidic or basic. How can we tell whether a given salt will act as an acid or base? Looking at the relative strengths of the acid and base that were used to form the salt can give us information on the acid-base properties of the resulting solution. Choices: - oxidation - evaporation - distillation - neutralization A:
(A).
neutralization

(Q).
Q: When the sun is below the horizon and thus not visible on a direct line, the light path will bend slightly and thus make the sun visible by what? Read this paragraph and choose the correct option from the provided answers: Because air is slightly more optically dense than a vacuum, when sunlight passes from the vacuum of space into our atmosphere, it bends slightly towards the normal. When the sun is below the horizon and thus not visible on a direct line, the light path will bend slightly and thus make the sun visible by refraction. Observers can see the sun before it actually comes up over the horizon, or after it sets. Choices: - reflection - thermal - infrared - refraction A:
(A).
refraction