Answer:The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass. In a physical change, a substance's physical properties may change, but its chemical makeup does not.
Explanation:
A tornado watch informs the public about the potential of a tornado; tornado warning informs the public that a tornado has formed or is nearby. When a tornado warning is issued, one should immediately take cover. Hope this helps!
Answer:
The correct otion is d.
Reason:
Primordial soup model was presented to explain the surface of earth in its prehistoric era.
Answer:
an experiment
Explanation: Any experiment you do to benefit the world in the name of science