Air pollution is caused by; 1. Ozone loss
2. Photochemical smog
3. Global warming
4. Acid precipitation

Answers
1. Only 1
2. Only 2
3. All of them
4. All expect from global warming

Ageologist determines that a sample of a mineral cant 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

Which is the correct first step in finding the area of the base of a cylinder with a volume of 26x cubic meters and a height of 6.5 meters? v=bh 6.5=b(26x) v=bh v=26pi+(6.5) v=bh v=26pi(6.5) v=bh 26pi=b(6.5)

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