Laboratory Exercise

Laboratory Exercise.

I’m studying for my Biology class and need an explanation.

Laboratory Exercise :

In this lab, you will experiment with a half-life model in which M&M candies represent radioactive atoms. The imprinted “M” on each candy represents whether the atom has become stable or not. Students place the candies “M”-side down in a box, shake them, and then count the number of “changed” atoms. The graphs that students produce also make half-life easier to understand.

Materials:

100 M&M’s

plastic box with lid

graph paper

Procedure

1. Place the candies “M”-side down in the shoe box.

2. Close the cover and shake.

3. Open the box and remove all the “changed” candies (those turned “M”-side up).

4. Count and record the number of “unchanged” candies remaining in the box. Record this data on the chart below.

Trials

Number of “unchanged Atoms

1

2

3

4

5

6

7

8

5. Repeat steps 2,3, and 4 until all the candies have turned or you fill in 8 rows on your table.

6. Construct your own graph using the data from your chart. On the graph, draw a curve for the data through your points. In this model of half-life decay, each shake is comparable to the passing of time (x-axis): the number of “unchanged” candies is comparable to the number of unchanged atoms (y-axis).

7. List and explain some examples of where half-life analysis would be useful in the real world. You may research this using any reference at your disposal.

Laboratory Exercise

"Looking for a Similar Assignment? Order now and Get a Discount!