A clock is used to measure time, so to solve this analogy, you need to pick out an answer choice that describes what a thermometer measures. A thermometer is used to measure “temperature,” so "temperature" is the correct answer.

Coffee is made from beans, of which a bean is the single unit, so we need to pick out an answer choice in which the first word is a single unit of the substance from which the second word is made. "Frosting is to cake" might look like a good answer choice, but cake is not made from frosting. Though frosting can be a part of a cake, you can also have a cake without frosting, so cake can't be made from frosting. So, "frosting is to cake" cannot be the correct answer. Because tea is made from leaves and "leaf" is the singular unit of "leaves," "leaf is to tea" is the correct answer.

Snow is something that falls in flakes, just as rain is something that falls in drops.

The analogy compares first a relatively large measurement to a relatively small measurement. There are two answer options that meet this criteria. "Centimeter is to meter" is an enticing choice that compares a relatively small measurement to a relatively large measurement; therefore, the relationship is reversed, and it's not quite right. "Gallon is to cup," although not a measurement of length like "foot is to inch" and "centimeter is to meter," correctly compares a relatively large measurement to a relatively small measurement, so it is the correct answer.

There are twelve inches in a foot and three feet in a yard, but you don't need to know that specifically to answer this question. An inch is a unit of measurement that makes up a foot, so to solve this analogy, you have to determine which of these answer choices is a unit that is made up of seconds. There are sixty seconds in a minute, so "minute" is the correct answer.

A "kilogram" is a unit of measurement used to measure how much something weighs, so to solve this analogy you have to determine what a "centimeter" is used to measure. The correct answer is that a "centimeter" is a unit of measurement that measures length, it is  of a meter. 

"Celsius" and "Fahrenheit" are both units for measuring temperature. A "kilogram" is a unit for measuring weight. So, which of these answer choices is also a unit for measuring weight? The correct answer is "pounds." Additionally, "meters," "yards," and "inches" are all units for measuring length; "kelvin" is another unit for measuring temperature.

"Mile" and "kilometer" are both units of "length," they are used to measure how long or how far something is. A "pound" is used to measure "weight," or how heavy something is. So, which of these answer choices is also a unit of measurement used to measure "weight?" The correct answer is "kilogram." To provide additional help, "liter" and "gallon" are both used to measure how much "volume" a liquid has, or how much liquid there is in a container. 

A "gram" is a unit of measurement used to measure how much something weighs. So, to solve this analogy you need to determine what it is that an "inch" is used to measure. The correct answer is that "inches" are used to measure "length," or how long something is. Additionally, "meter" and "foot" are other units used to measure how long something is.

Tea is often contained in a cup. So, to solve the analogy, you need to pick out the answer choice in which the first word is something that is often contained in the second word. Oil is often contained in a barrel, so "oil is to barrel" is the correct answer.