Which biogeochemical cycle has the least activity because the essential element is mostly stored in rock?

What forms when chemical reactions combine pollution with sunlight?

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 property of water causes water drops to bead on a freshly waxed car?