Ascientist makes the claim that chemicals like calcium chloride contain energy. which of the following
statements is the best piece of evidence to support this claim?
a. when calcium chloride reacts with water, the water becomes cloudy.
b. when calcium chloride reacts with water, the temperature does not change.
c. when calcium chloride reacts with water, the calcium chloride dissolves.
d. when calcium chloride reacts with water, the temperature changes.

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An externality can be created by a. people working at a production job and enjoying their work b. a production activity but not a consumption activity c. a consumption activity but not a production activity d. a production activity or a consumption activity externalities a. are always positive, and an example is flu vaccinations b. are always negative, and an example is the pollution created by trucks c. can be negative or positive. logging has a negative externality, and education has a positive externality d. can be negative or positive. a negative externality is having to go to school when you would rather go to the beach, and a positive externality is spending time with your friends

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