Question

Which of the following is a mixture?

A) sand
B) carbon dioxide
C) silicon
D) silicon dioxide

Answer 1

The correct answer is A

Answer 2

Sand is the answer.

Sand is a heterogunous mixture (particles are not evenly distributed) composed bof many particles generated by the erosion of rock (sometimes corals and shells) but it's mainly composed by silicon dioxide.

Hope it helped,

BioTeacher101