You didn't do well this time.
Try again after reading a bit more about plastics and density...
Well done on a great score!
You definitely have some understanding of plastics and density. Maybe you could aim for even more correct answers next time!
That's a great score!
You have excellent knowledge of all the facts! People learn from you, but don't forget there is always room for improvement. Keep on learning and inspiring others. The world needs you!