Q: Where was the distinction between total distance traveled and displacement first noted? Choices: - uncertainty principle - Newton's first law - string theory - one-dimensional kinematics A:
one-dimensional kinematics

Q: What is a layer of saturated porous rock? Choices: - a shear - an overhang - a quarry - an aquifer A:
an aquifer

Q: Q: Hormones, ions, and neurotransmitters are all types of what? Choices: - nutrients - pathogens - proteins - chemical signals A:
A: chemical signals

Question: Q: What is another name for producers? Choices: - plants - rotifers - allergens - autotrophs A:
Answer: autotrophs

*Question*
Q: Ions are charged what? Choices: - molecules - protons - isotopes - atoms A:
**Answer**
atoms

Q: What attracts the earth to the sun? Choices: - weight - light - the moon - gravity A:
gravity