What can be used to heat a large amount of liquid

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

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false

8. what happens to matter during a chemical reaction