Multiple choice identify the letter of the choice that best completes the statement or answers the question. the best type of graph to illustrate the change in air temperature over a period of time would be a graph. a. circle b. line c. bar d. all of these

The answer for #3 is c but i don't know why

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

What type of organic molecule comprises the majority of a potato?