Where cool air descends to the ground there is a Select one:

a.
high-pressure zone.

b.
Foehn wind.

c.
valley breeze.

d.
polar front.

Which of the following electromagnetic waves can create ions?

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.

In salt water solution,the salt is the blank