Question

The validity of scientific theories and laws depends on evidence. Which of the following statements of evidence supports a law rather than a theory?
Electrons orbit the nucleus of an atom within a certain radius.
DNA analysis reveals that a modern species is related to an extinct species.
Seafloor spreading occurs at a rate of three centimeters per year in the mid-Atlantic.
o The amount of matter in a closed system is the same at the start of a reaction as at the end of the reaction.

Answer 1

Answer:D

Explanation:the amount of matter in a closed system is the same at the start of a reaction as the end of the reaction

Answer 2

Answer:

d the amount of matter in a closed system is the same at the start of a reaction as at the end of the reaction