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Atomic mass

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Physics
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Atomic nucleus
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electron
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Question 1?(Worth 1 points) [02.01]Which of the following is essential for a theory to become widely accepted within the scientific community? ?A theory must include a valid scientific model. ?A theory must be supported by many different experiments. ?A theory is an educated guess based on multiple observations. ?A theory must change over time regardless of the scientific data. Points earned on this question: 1 Question 2?(Worth 1 points) [02.01]Which of the following is the?best?definition of a scientific model? ?any visual representation of scientific experimental findings ?a 3-d object used to demonstrate key scientific theories and data ?a visual, verbal, or mathematical explanation of experimental data ?an explanation of any scientific idea, theory, or experimental results

AP Chemistry Vocabulary Chapter 1-4,9

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Chemistry
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Physics
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Mass
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Chemical element
matter
Atomic theory
Chemical substance
Atomic mass
electron

analytical chemistry the area of chemistry that focuses on the composition of matter applied chemistry research that is directed toward a practical goal or application biochemistry the area of chemistry that focuses on processes that take place in organisms biotechnology the field that applies science to the production of biological products or processes chemistry the study of the composition of matter and the changes that matter undergoes experiment a repeatable procedure that is used to test a hypothesis hypothesis a proposed explanation for an observation inorganic chemistry the study of substances that, in general, do not contain carbon macroscopic describes the world of objects that are large enough to see with the unaided eye matter

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Ozone depletion
Environment
Oxygen
Earth
Chemistry
Atmosphere
Disinfectants
Environmental chemistry
Ozone
Ultraviolet
Stratosphere
Ozone layer
Health
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Physics
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Baryons
Charge carriers
Atomic number
Proton
Ozone depletion
Ozone
Chemical element
Atomic mass
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Gone With the Wind

Michael Treacy 3/3/2010 Pd. 3 Ozone Hole @ TD 1. What is the Ozone and why do we need it in our atmosphere to have a healthier planet? The Ozone is the Gas O3. This gas is located in the Stratosphere and absorbs UV Rays. We need the ozone in our atmosphere because it absorbs 98% of the UV Rays. Without the ozone to filter all these UV Rays many animals would have medical / health problems. 2. Describe how the ozone protects us. The ozone protects us by filtering out and absorbing most of the UV Rays before they reach the earth. Most of the Rays are biologically harmful and know to damage tissues and cells. 3. How is a chlorine atom harmful to the ozone in the stratosphere?

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