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Reading Quiz



This activity contains 18 questions.

Question 1
1
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Fluoride can prevent tooth decay by _________.
 
End of Question 1


Question 2
2
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Substances that cannot be broken down into other substances are called _____.
 
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Question 3
3
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Four elements combine to make about 96% of the weight of the human body. Which of the following elements is one of the four?
 
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Question 4
4
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Substances that contain two or more elements in a fixed ratio are called _____.
 
End of Question 4


Question 5
5
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The simplest unit of matter that still retains the properties of an element is a(n) _____.
 
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Question 6
6
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In an atom with a neutral overall charge, the number of protons is equal to the _________.
 
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Question 7
7
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Silicon has an atomic number of 14 and a mass number of 28. How many neutrons are found in silicon?
 
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Question 8
8
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Carbon-12 and carbon-13 are different in the number of their _____.
 
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Question 9
9
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What is the term for atoms that are electrically charged as a result of gaining or losing electrons?
 
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Question 10
10
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Which of these is a type of chemical bond that involves the sharing of electrons?
 
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Question 11
11
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What type of bond joins neighboring water molecules?
 
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Question 12
12
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In the reaction glucose + fructose sucrose + water, _____ is a reactant and _____ is a product.
 
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Question 13
13
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The tendency of molecules of the same kind to stick together is called _________.
 
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Question 14
14
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Which of these is an example of a solution?
 
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Question 15
15
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Physicians have used imaging techniques for medical diagnosis for some time, but recently have begun usage of magnetic resonance imaging (MRI), which depends on _______.
 
End of Question 15


Question 16
16
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Which one of the following represents the pH inside most living cells?
 
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Question 17
17
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A substance that resists changes in pH is referred to as a(n) _____.
 
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Question 18
18
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If you were asked to determine if there is life on Mars, what would you propose to do?
 
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