Which scenario describes an interaction between two different "spheres"? 1. Arctic hare eating woody plants in Alaska
2. Runoff from farming areas into local streams
3. erupting volcano reliasing water vapor into the air
4. Magma Cooling and solidify before it reaches earth’s surface

Non renewable resources like petroleum eventually

What are the primary responsibilities of a chemical engineer involved in "r& d"? develop large scale manufacturing operations discover new products and processes training of new chemists determine products needed by consumers

In chemistry, the type of an atom (what element it is) is determined by: a) the number of protons it contains in its nucleus. b) the number of neutrons it contains in its nucleus. c) the number of protons it has in a cloud around the nucleus. d) the number of neutrons it has in a cloud around the nucleus. e) the number of electrons it exchanges with its neighbors.