When dry ice is exposed to the air, it changes to a vapor. This is an example of
A. condensation
B. evaporation
Ο Ο
Consublimation
D. freezing

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Which proportionality applies to avogadro’s law?

Which of the following is a physical change? a.burning a piece of wood b.sawing a piece of wood in half c.rust forming on an iron fence d.a copper roof changing color from orange to green