Answer the following question given this paragraph: Q: Because action potentials are so brief, a neuron can produce hundreds per what? A:
OPTIONS:
- day
- minute
- lifetime
- second

Answer: second

Answer the following question given this paragraph: Thermal energy is the total energy of moving particles of matter. The transfer of thermal energy is called heat. Therefore, a heating system is a system for the transfer of thermal energy. Regardless of the type of heating system in a home, the basic function is the same: to produce thermal energy and transfer it to air throughout the house. Q: What do you call the transfer of thermal energy? A:
OPTIONS:
- formation
- humidity
- precipitation
- heat

Answer: heat

Answer the following question given this paragraph: The rates at which chemical reactions take place in organisms are very important. Chemical reactions in organisms are involved in processes ranging from the contraction of muscles to the digestion of food. For example, when you wave goodbye, it requires repeated contractions of muscles in your arm over a period of a couple of seconds. A huge number of reactions must take place in that time, so each reaction cannot take longer than a few milliseconds. If the reactions took much longer, you might not finish waving until sometime next year. Q: What kind of reactions are involved in processes ranging from the contraction of muscles to the digestion of food? A:
OPTIONS:
- liquid
- atomical
- mineral
- chemical

Answer:
chemical