An independent variable is the variable changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent variable is the variable being tested and measured in a scientific experiment.
A. Identify the properties as either a physical or chemical property. (first 3 are chemical, last is physical)
Answer:
Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density. Hot water is less dense and will float on room-temperature water. <u>Cold water is more dense and will sink in room-temperature water.</u>
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Answer:
A.
Explanation:
hope this helped sorry if its wrong!
Nitrous oxide has 2 nitrogen atoms and 1 oxygen atom per molecule
