test one cleanser against another on two materials of the same kind (to make a fair test) and time it (to see if the claim that it works twice as fast is true)
Yes, like the person above…you should always mention it unless it is below average. A don’t mention the bad thing sorta thing, if that makes sense
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Answer:
1,170 cookies
Explanation:
the baker works 8 hour, subtract 1 hour(lunch break) and 30 mins(both breaks) and you get 6 1/2 hours. then you multiply 6 by 180(90 cookies in 30 mins= 180 cookies an hour). once you multiply that you should get 1080, then you add 90 for the half hour.
Answer: UV rays reacting with the O2 molecules (Option C)
Explanation:
Ozone in the earth's stratosphere is created by UV light striking oxygen molecules containing two oxygen atoms, splitting them into individual oxygen atoms called atomic oxygen. Then atomic oxygen combines with unbroken O2 to create ozone (O3). The ozone molecule is unstable and when UV light hits ozone, they again split into the molecule of O2 and an individual atom of oxygen.
The causes of ozone depletion also include:
Human activity such as the release of various compounds containing CFC’s is a major cause of ozone damage. CFC is the most evident and the most destructive molecule.
Natural sources also contributes to the depletion of the ozone layer.
During large volcanic eruptions, chlorine as a component of HCL is released directly into the stratosphere, along with sulfur dioxide.
