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Cancer Laboratory (30 Marks)

Instructions: Answer the questions below as you move through the introductory section of the lab.
1.  What is a carcinogen? (3 marks, K/U)

2.  Name at least 4 of the major carcinogens identified by scientists today. (2 marks K/U)

3.  Explain in your own words what cancer is and how it spreads in the human body. (5 marks, C)

Lab Activity
Problem:	To determine the effect of different substances on cell division of normal cells.

Materials:	Petri dishes with normal cells, concentrated amount of carcinogens.
	Four types of carcinogens to be tested:
•         Cigarette smoke
•	Ultraviolet radiation 
•	Viruses
•	Pesticides (or chemicals)
•	Fruits and vegetable solution
•	Water
•	Juice
•	Grass

Procedure:
1.  Complete the interactive Cancer Laboratory by following the instructions provided within the virtual lab.

2. Record your observations in the table shown below.

3. Answer the analysis questions at the end of the handout.

Observations (5 marks T/I)
Petri Dish #	Name of substance	Description of substance	Initial appearance of cells	After 36 hours-- appearance of cells	After 72 hours-- appearance of cells	Does this substance cause cancer? 
(Yes or No)	
1

							
2

							
3

							
4

							

Analysis (15 Marks)
1.   For each of the Petri dishes, explain how you know that a change has taken place. (3 marks, A)

2.  Which substances in your experiment cause cancer? (3 marks, T/I)

3.  How has this laboratory changed the way you think about your environment and your         own health?  (5 marks, A)

4.  If an individual is exposed to a carcinogen over a long period of time, how do you think it will affect his/her health? (4 marks, A)