Problem: 
Q: Q: Why do electronegativities decrease from top to bottom?   A:
Answer: larger atomic size
Problem: 
Q: Q: Birds possess a cloaca, a structure that allows water to be reabsorbed from waste back into this?   A:
Answer: blood stream
Problem: 
Q: Q: The tendency of an object to resist a change in its motion is called?   A:
Answer:
inertia