Which of the following is part of the biochemical cycle (A) Carbon tapped on the ocean floor. (B) Helium gas escaping into space (C) Lava flowing from an active volcano (D) Solar radiation traveling to earth

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

here is the answer

water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.