Answer the following question given this paragraph: The frequency , , is the number of cycles an object or wave goes through in 1 second. Frequency is measured in Hertz (Hz). 1 Hz = 1 cycle per sec. Q: In what unit is frequency measured in? A:
OPTIONS:
- mole
- centimeter
- gram
- hertz

Answer: hertz

Answer the following question given this paragraph: Though not particularly beautiful machines, calorimeters are incredibly useful ones. They are used to determine the calories (food energy) in food, as well as the average heat yield from burning various grades of coal and oil. The price of coal is often dependent on the heat yield from samples burned in a calorimeter. Q: What machine is used to determine the calories in food, as well as the average heat yield from burning various grades of coal and oil? A:
OPTIONS:
- radio telescope
- thermometer
- alethiometer
- calorimeter

Answer: calorimeter

Answer the following question given this paragraph: Roundworms have organ-level organization, in which two or more types of tissues work together to perform a particular function as an organ. For example, a roundworm has a primitive brain that controls how the organism responds to the environment. Q: Roundworms exemplify what type of organization, where two or more types of tissues work together to perform a particular function as an organ? A:
OPTIONS:
- bone-level organization
- land-level organization
- delicate - level organization
- organ-level organization

Answer:
organ-level organization