Evaluating Scientific Explanations

Question 1

A number of substances and their chemical formulas are listed below. Check the ones that are compounds.

Revolt · Accepted Answer

carbon monoxide (CO); glucose (C6H12O6)

Question 2

Which statement best describes the relationship between the ingredients?

Revolt · Accepted Answer

They are not chemically bonded to each other.

Question 3

To separate a mixture of large gravel and sand, the most efficient method would be .

Revolt · Accepted Answer

passing the mixture through a sieve

Question 4

Coffee is a solution of organic substances in water.

Revolt · Accepted Answer

mixture

Question 5

Caffeine contains hydrogen, carbon, nitrogen, and oxygen atoms in a fixed ratio.

Revolt · Accepted Answer

compound

Question 6

Soda is a mixture. The ingredients list for a can of soda is given below.The ingredients of the soda are best described as .

Revolt · Accepted Answer

compounds

Question 7

To separate a mixture of hard candies and marbles, the most efficient method would be .

Revolt · Accepted Answer

sorting the mixture by hand

Question 8