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Which of the following does not describe a compound?

FREE RESPONSE SECTION:  The following questions require that you write out your answers.  

What is the definition of chemistry (include main definition and the 3 things studied in chemistry)? Answer in complete sentences for full credit. (5 points)

EXTRA CREDIT: The following questions are Extra Credit Questions.  These questions come from a variety of resources including the Corwin Textbook Articles, the Revell eText Articles and the “Unusual States of Matter” Video. You can earn up to 5 points of extra credit by answering these questions.  I suggest you give them a try because you may know the answers even if you have not read the articles or watched the video. The questions are graded holistically.

Describe at least three differences between a sealed bottle of water (H2O) and another sealed bottle containing hydrogen and oxygen (H2 and O2). Both bottles are at room temperature. (hint: Think through your classification of matter chart and your states of matter chart). (3 points) Format your answer by creating a chart similar to the one below.   You do not need to write in complete sentences. Difference  Bottle of Water (H2O)                               Bottle of Hydrogen & Oxygen (H2 and O2)                    (1) (1) (2) (2) (3) (3)

EXTRA CREDIT–From Revell Textbook: a) What type of tree was the source of the drug named Taxol?  b) What does the drug Taxol do in the body?  c) What was the problem with extracting Taxol for use as a drug from trees? d) What was one of the ways that this problem was overcome?

Determine whether the following statement is TRUE OR FALSE: Vaporization is the general term for a gas changing to a liquid.

Determine whether the following statement is TRUE OR FALSE: Gases have the greatest spacing between particles.

Referring to the figure below: What point in the graph is the phase change of melting occurring?  

Which of the following statements is FALSE about energy changes?