Which of the following best describes a person doing science?
a. dominick uses a computer to do his math homework.
b.
lindsay measures the sizes of the craters on the moon
c. isabel invents a new kind of doorknob.
d. murray randomly predicts the result of a coin toss.

The correct answer is B. Lindsay measures the sizes of the craters on the Moon

Explanation:

Science is the field of knowledge that aims at studying and understanding different types of phenomena that occur in the natural world. Due to this, the Scientific Method includes stages such as observation, creating a hypothesis, testing and sharing results as the main focus is to be able to explain why, how and when a certain event or phenomenon takes place based on logic and evidence. According to this, the statement that describes a person doing science is " Lindsay measures the sizes of the craters on the Moon" because she relies on observation and testing to try to understand a natural phenomenon or element.

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .