When a volume of water is cooled, the molecules move less vigorously, so same number of molecules takes up less space and the water is denser. If Mona fills up a cup with water and places that water into the oven, what happens to the density of the water as it heats up increases or decreases?
decreases

This is also called diffusion, and the process is much faster in gases than in liquids, because the particles in gases are further apart. Kate is going to diffuse a liquid and a gas. The gas is diffused first, because the particles with it are closer together or further apart?
further apart

Q: Many of the worlds people live with water scarcity, and that percentage will increase as populations increase and climate changes. John's town used to have little water, back when there were several thousand people. However, now that the town holds only a few hundred people, the water availability is scarce or plentiful?
A: plentiful

Question: As blood glucose levels decrease, less insulin is produced. Bob's blood glucose levels have decreased, which means he should also be producing less or more insulin?
Answer: less

*Question*
More pollutants mean poorer air quality. Michael is studying the air quality of various cities. He finds that there are many more pollutants in the air in Mexico City, than there are in the air of Chicago. Therefore, the air quality will be lower in Chicago or Mexico City?
**Answer**
Mexico City

Water density increases as salinity and pressure increase, or as temperature decreases. By removing a pound of salt from a bucket of fresh water, could you cause the density of the water to increase or decrease??
decrease?