Degrees true hours false seconds false
D! because when you record something you will probably analyze the results and those are two big KEY components of an Experiment! <span />
Answer:
Saffi only
Explanation:
I just took the test and that was the correct answer :)
Answer: Air
Explanation: Pure air is a mixture of several gases that are invisible and odorless. Consists of 78% nitrogen, 21% oxygen, and less than 1% of argon, carbon dioxide.