Jenna took an open bowl of leftover mashed potatoes from the refrigerator. she determined that chemical changes occurred since the potatoes were first placed there. which observations most likely led to jenna’s conclusion? a production of odor a decrease in temperature a change in moisture content a decrease in mass

a production of odor

Explanation:

an odor is caused by one or more volatilized chemical compound that  humans and other animals can perceive by the sense of smell.

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A production of ordor. It suggests that a new substance formed that was not originally there. Which is a result of a chemical change.

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever