Homework Set 1 - Covers select topics from Chapters 1-3 from the Suchocki text.

Use the "COPY" mode to selectively copy and paste these problems into a word program.   Print the questions so they will fit nicely on a printed page.  Answer the questions on these pages (hand written or word processed is fine) and submit them with your name on them.

1.  A junked car is neatly crushed into a compact cube.  Which of the following physical quantities remain constant as a result of this action?  Circle all that apply AND explain why each circled physical quantity remains constant.

Volume        Mass        Density        Weight        Phase of Matter

2.  Circle the best answer to complete this statement:  The “Scientific Method” is a systematic means of _______________.

a.      proving a hypothesis is true.

b.     creating models to interpret experimental data.

c.      revealing if a hypothesis is consistent with experimental data.

d.      All of these are correct.

3.  Provide a definition and an example for each of the following terms:

a.      Kinetic Energy    definition:

                               example:

b.     Potential Energy   definition:

                                example:

c.      Physical Property  definition:

                                 example:

d.  Chemical Property  definition:

                                 example:

4.  The helium atoms inside a helium filled birthday balloon all slowly escape through 
the walls of the balloon and are contained inside a house.  What happens to the density 
of the helium gas as a result of this process (i.e. in the balloon versus in the house)?
        

5.  What is the difference between an element and a compound?

6.  How many liters are in 1000 centiliters?  Show your work.

7.  How many kilograms are in 235 pounds if there are 2.2 pounds per 1 kilogram?  Show your work.

8.   Why are elements grouped into columns (a.k.a. groups, families) on 
the Periodic Table?

9.  At what temperature does water freeze on the Kelvin scale if it 
freezes at 0^o on the Celsius scale?  Show your work.

10.  Provide a definition for a theory that clearly differentiates it 
from a hypothesis or a law.  

11.  Describe a situation when an object can have mass without having weight.  

12.  An aspirin contains 250 milligrams of active ingredient.  How many micrograms of active ingredient does it contain?  Express your answer in scientific notation.   Show your work.

13.  Name the unit name and give the unit symbol abbreviation 
for energy.  (The answer is NOT energy, E !!)

14.  Circle ALL the substances that are elements in the following list.     
                      Cl₂          NaCl         Co          O₃.  

15.  (a)  Circle the atom below that is the biggest.    
                    F          Na          Al          Ar
     (b)  Is this atom a metal or a non-metal?

     (c)  What is the atomic number of this atom?

16.  The name of an atom with the symbol, ³²S, is _______.  This (neutral) atom contains _______ neutrons and _________ electrons.

17.  Which one of the following atoms (a, b, or c) corresponds to Iron-56?  Iron is atomic number 26 on the periodic table.  (Circle the correct atom letter.)

18.  Every atom is uniquely identified by its _________________________________ which is the number of

       ____________________ located________________  the nucleus of the atom.