An area that contains a planet that may be able to support life.
An area that is neither too close nor too far away from a star.
Explanation:
Goldilocks zone is an area near a star which is neither too cold nor too hot and contains a planet that can support life. It is the area that is neither too close nor too far away from a star and liquid water can exist.
In solar system, Earth and Mars lie in the Goldilocks zone. Life exists on Earth and many missions have been sent to Mars in search of liquid water.
I would say the greatest amount of error is introduced by eyeballing the flask at two different levels. You're supposed to measure liquids at eye level. The angle viewing downward could be off by a good amount
