Chapter 1 Flashcards
What is chemistry?
It is the study of matter and the changes is undergoes.
What is matter?
Anything that has mass and takes up space.
What is the ozone layer?
A layer of ozone that protects us from ultraviolet radiation.
Increased levels of UV can cause__?
Cataracts and skin cancer in humans, yield in agriculture, and disrupt food in the chain of nature.
T or f. Living organisms have evolved i the presence of UV and cells have some abilities to repair themselves.
True. But at a certain point they don’t have the ability and die
Ozone is made up of what? And how much?
Made up of 3 oxygen molecules.
In which layer of the earth would you find ozone layer?
In the stratosphere.
How and where is ozone formed?
Forms in the stratosphere,forms when oxygen O2, is hit with UV light and then creates with O3.
Refrigerators and coolants etc. where made up of ___ first.
Amonia.
CFC are chlorofluorocarbons which are? When did the production begin?
A substance that consists of chlorine, fluorine, and carbon. Beginning in the 1920s.
What is released the brakes ozone?
Chlorine from the CFC is released when UV lights hit it. Then it breaks up O3 by attracting one oxygen molecule from the, leaving the O3 with only two oxygen molecules. Then it can attract another oxygen molecule and then it created O2 and the chlorine molecule breaks of and repeats the process.
What is technology?
A practical application of scientific information.
What is mass?
A measurement that reflects the amount of “stuff” something has in it. The amount of matter something has.
___ is a measure of mass and the the force of gravity on a object.
Weight.
A model is a __.
verbal or mathematical explanation of experimental data.
