Q: Most gas molecules in the atmosphere are pulled close to earth's surface by what force? Choices: - weight - light - traction - gravity A:
gravity

Q: What term is used to describe the transfer of thermal energy by particles moving through a fluid? Choices: - condensation - diffusion - evaporation - convection A:
convection

Q: Q: What is the oxygen carrying component of red blood cells called? Choices: - molecule - mitochondria - platlet - hemoglobin A:
A: hemoglobin

Question: Q: What is the minimum depth in the aphotic zone? Choices: - 150 meters - 450 meters - 10 meters - 200 meters A:
Answer: 200 meters

*Question*
Q: Steel, bronze, and brass are good examples of what? Choices: - metalloids - elements - salts - alloys A:
**Answer**
alloys

*Question*
Q: When matter reacts, there can be what that comes from nowhere and is unaccounted for? Choices: - concentrations - combustions - bonds - mass A:
**Answer**
mass