Making Science Real

Students get a list of 75 items to find and a set of rules. I assign some number of items to find, usually 50. 

Here are a few items on the Chemistry version. Possible responses are in the image, above 

3. A gas that exhibits properties of an inert gas. Give the name and formula of the gas.

16.      A sample of gas whose atoms have an average velocity less than that of oxygen atoms. Show calculations which verify this.

32.      A sample of an element with more than 5 electrons in its outer shell.

46.  An element that has more than one isotope and can exist as an ion.

Here are a few items on the Biology version:

1. A substance made of amino acids. Define amino acid, sketch the structural formula, and tell which type of substances are composed of amino acids.
2. A structure containing an organelle that carries out photosynthesis. Sketch the organelle and label the parts.  What is the source of the energy used in photosynthesis?
3. A plant that does not have roots at any stage in its life cycle. Label the structure that anchors the plant to the earth.
4. A solution from which water would diffuse into a plant cell placed in the solution. Describe the solution and explain why water would diffuse into the cell.

Students find an item that meets the criteria, seal it in a plastic sandwich baggie,  and attach an index card with the description as stated on the list of items. They may have to state:

1. • The ID number from the list and the identity of the item
   • Any labeling, verification, measurements, calculations, formulas, equations, explanations, etc.
   • Explaination of how the item answers the question. Include chemical formulas, where appropriate.
   • Include the reference or source in a format that can be easily traced, such as a specific website URL. You may cite the person who told you information as a credit.

Three points are awarded for explaining how the object chosen meets the criteria in the bullet points.

For the biology version, students would find, for Item 1,  something containing protein. They would write on the index card the definition of amino acid, sketch the structural formula of any amino acid, state that protein is made of amino acids, and explain how their item meets the criteria by being an example of protein. Suppose the student chose a chicken bone (they really don’t smell all that bad in a sealed plastic bag.) An explanation might look something like:

“Item 1: A chicken humerus, with some meat still attached. The meat is protein, which is made of amino acids.”

The fun really begins when students realize, as the directions encourage, that a single sample may meet the criteria for several listed items.  The chicken wing could also be used for #28, which states

28. An object from a living thing that is considered amniotic. Explain how the object represents the living thing, why the living thing is considered to be amniotic, and explain the significance of an amnion.

The student would write on a card, and attach it to the same baggie:
“Item 28: A chicken humerus. This bone is from a chicken.  Chickens lay eggs with amnion, a lining inside the shell.  The amnion, or amniotic membrane, helps the egg retain water while the chick is developing.”

Water, sugar or salt solutions, a leaf from a plant can be used for many of the items listed.