He diagram below represents part of the oxygen cycle. Which arrow, or series of arrows, represent the movement of atmospheric oxygen (O2 ) during respiration?
a. only arrow 2 b. only arrows 2 and 6 c. only arrows 1 and 6 d. only arrow 6

Describe what happens to the molecules as water goes from ice to liquid to vapor. be sure to explain what happens to the temperature during the phase changes.

Essay-alternative energy sources research sources of energy that are being developed. write a report of 350-400 words discussing the information you learned concerning the development of various energy sources and the impact that you think they will have on your life. include sources cited at the end of your report using the mla format. follow the rubric guidelines. note that wikipedia is not an appropriate resource for a research paper. worth 99

What is the difference between a substance "getting wet" and "being dissolved" in a liquid at the particulate level?