The purpose of biofeedback is to learn to relax by controlling which of the following?
a. blood pressure
b. conscious surroundings
c. suggestibility
d. brain waves and heart rate

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

What would happen if the tubing with the yellow band was placed in a beaker of distilled water?

How do water’s relative densities as a solid and a liquid differ from that of most other substances? water’s solid and liquid forms have different densities, while most other substances have solid and liquid forms with similar densities. water’s solid and liquid forms have similar densities, while most other substances have solid and liquid forms with different densities. water’s liquid form is less dense than its solid form, while the opposite is true of most other substances. water’s solid form is less dense than its liquid form, while the opposite is true of most other substances.