MB#3367               Chemistry  09/91



1.  Define chemistry and tell what chemicals are.

    a. Make a lsit of 10 chemicals found in your home and their use.

    b. Tell how chemicals in your home are safely stored and how to

       dispose of them safely.

    c. Tell the difference between a chemical reaction and a

       physical change.



2.  Tell what analytic chemists do.

    Do THREE of the following:

    a. Prepare an indicator from a leaf plant or bloom. Show that it

       works when vinegar neutralizes a baking soda solution.

    b. Compare the strengths of 5 percent solutions of baking soda

       and borax by titrating each with vinegar.

    c. Test two different bits of food for strach and for protein.

    d. Compare the amounts of Vitamin C in two kinds of fruit juice.

    e. Show that ink or food coloring has two or more colors by

       using paper chemistry.



3.  Define biochemistry.

    a. Write the simple equation for photosynthesis. Explain what parts

       sunlight and chlorophyll play in it. Give the names and symbols

       of the three parts of a 10-6-4 fertilizer. Explain what each

       does for plants. Draw from memory a sketch of the carbon dioxide

       cycle.

    b. Explain what oxygen does in the body of an animal. Describe how

       oxygen, carbon dioxide, and carbon monoxide are carried in the

       body. Describe the chemical changes taking place when



       Vegetables cook

       Meat cooks

       Bread dough rises

       Bread bakes

       Bread is chewed



4.  Define inorganic chemistry. Carry out an experiment to show three

    different ways of protecting iron or steel from rusting. Tell why

    aluminum doesn't rust the way iron does. Do an experiment in which

    one metal makes another metal deposit from a solution. Explain what

    takes place in terms of the activity series of metals.



5.  Define organic chemistry.

    a. What are organic chemicals?

    b. Name three organic chemicals.

    c. Tell the difference between polar and nonpolar.

    d. Show how polar and nonpolar substances do not mix.



6.  Define physical chemistry.

    a. Construct a Cartesian diver.

    b. Explain why the medicine dropper sinks to the bottom when the

       sides are squeezed.



7.  a. Name two chemicals that cause air, water, or solid waste

       pollution near your home. Tell where these pollutants

       might come from. Find one way to control one of these. Do

       one test to show that air or water is polluted.

    b. Do ONE of the following:

       1. Write the formula for ozone. Tell where it is found. Tell

          how it is both a pollutant and also necessary for a 

          healthy environment.

       2. Write the formula for carbon dioxide. How can it cause the

          greenhouse effect?

       3. Write the formula for sulfur dioxide. Explain what acid

          rain is. What does the pH measure. Measure the pH of

          rain or a body of water near your home. Tell how acid

          rain can be prevented.



8.  Do ONE of the following:

    a. Visit an industrial plant that makes chemical products or

       uses chemical processes, and describe the processes used. What,

       if any, pollutants are produced and how are they handled?

    b. Visit a laboratory or business that uses chemicals and find out 

       how and why chemicals are used.

    c. Visit a county agent to learn how chemistry is meeting the farm

       problems of soil fertility and crop pests.



9.  Describe two different kinds of work done by chemists, chemical

    engineers, and chemical technicians. Explain the differences in

    college courses for training each of these three kinds of people.