Question

Read the sentence.

The same amount of matter exists before and after the change — none is created or destroyed.

How does this sentence contribute to the article's main idea?

A
It defines what is meant by the phrase "chemically the same."
B
It defines the concept of conservation of matter.
C
It explains why changing matter is important.
D
It explains that atoms have been around for a long time.

Answer 1

B

It defines the concept of conservation of matter.

Step-by-step explanation: