Changes in color and temperature indicate that a reaction has taken place. chemical physical

Chemical reaction.

Explanation:

Changes in color and temperature indicates a chemical reaction has taken place.

A chemical reaction involves two species combining to give a product. They are usually a product of chemical changes between two combining species.

In a chemical change;

Chemical

Explanation: Changes in color and temperature indicate that a chemical reaction has taken place.

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas