Which of the following can be natural sources of water pollution? a. volcanic activity b. earthquakes c. algae blooms d. all of the above

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 characteristics can be used to differentiate star systems? check all that apply.

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !