Competency Case

Competency 2

LEAVE QUESTIONS IN. ANSWER EACH QUESTION RIGHT BELOW IT

A. Materials and Diagram

1.Why is it important to be specific about names, amounts, concentrations, brands, types, etc. when listing materials?

2.So that your procedure ids reproducible.

2. Cut and paste parts of your materials section to show that you have listed your materials specifically and with amounts.

*Multiple 2liter coke bottles(empty)

*2 square feet of copper plating

*Water

*Wires(1 small spool) + alligator clips(small)

*Table salt

*Large sheets of cardboard

*Tin foil

*Duct tape

*Volt meter

B. Procedure

1.Define sequential and reproducible and explain why procedures should be sequential and reproducible.

2.Sequential - In chronological order. So that another scientist can reproduce your procedure.

2. How can diagrams be used to clarify a procedure?

3. Rewrite the following procedure so that it is sequential and reproducible, making sure to make it as concise as possible. Note that different types of sandwiches are being made.

Procedure for making Peanut Butter and Jelly Sandwiches

1. Before you start, you need to get all your materials (two slices of bread, 20 ounces of peanut butter, 10 ounces of grape jam, knife, wax paper).

2. Lay out a piece of wax paper on the table.

3. Place a slice of bread on the wax paper.

4. Using the knife, spread peanut butter over the bread until there is a thin layer of peanut butter all over the bread (1 oz).

5. Spread the jam all over the second slice of bread.

6. Place the second slice of bread on top of the first slice of bread.

7. Cut the sandwich diagonally to make two pieces.

8. Put peanut butter on another piece of bread, but this time put twice as much.

9. Put grape jam on the second bread.

10. Put the two pieces of bread together.

11. Cut the sandwich diagonally