1.
What are the basic building blocks of matter?
2.
This chemical process breaks down complex modules by adding water to them.
3.
Can the two helix strands of DNA unravel?
4.
Which type of change in matter is generally reversible?
A. 
B. 
C. 
Both physical and chemical
D. 
5.
Name the 3 phases of matter: _____, _____, _____
(no caps; separate each word by a comma and a space)
6.
How can you change a substance from one phase to another?
7.
Name the three things that make up an atom: _____, _____, _____.
(separate by a single comma and space; no caps.)
8.
If an atom has 7 electrons, how many protons does it have?
9.
What determines the vast majority of an atom's properties?
10.
What is the charge of an electron?
11.
True or false: a molecule have more than one structural formula.
12.
True or false: two different molecules can have the same chemical formula.
13.
Two different molecules with the same chemical formula are called:
A. 
B. 
C. 
Nothing; they do not exist.
14.
What is removed in a dehydration reaction?
15.
The most important molecules in the study of life, organic molecules contain only this element and any of the following: hydrogen, oxygen, nitrogen, sulfur and/or phosphorous.
16.
When a living organism takes small molecules and makes larger molecules, we call it:
17.
If a solution has a pH of 5, it is:
18.
When one substance is dissolved in another, it is a physical change, and the result is called a:
19.
This process is the random motion of molecules from an area of high concentration to an area of low concentration:
20.
This special class of proteins act as catalysts for many of the chemical reactions that support life:
21.
The basic building blocks of a protein are called:
22.
This is the name for a substance that alters the speed of a chemical reaction, such as photosynthesis, but is not used up in the process.
23.
This is the tendency of a solvent to travel across a semi-permeable membrane into areas of higher solute concentration:
24.
This is a collection of atoms that all have the same number of protons:
25.
These are chemicals that result from atoms linking together: