Learning Exercise

Fun With Fomites

Students will observe how different objects may contain microbes. They will observe multiplication of microbes.

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Technical Notes

The teacher will need extra time before and after each class period to set up and prepare materials.


Students should be familar with making charts, observations, and should be able to follow laboratory instructions. They should have a basic understanding



Type of Task

Learning Objectives

Meets 7th Grade California Standards: All living organisms are composed of cells, from just one to many trillions, whose details usually are visible only through a microscope. As a basis for understanding this concept: Students know cells divide to increase their numbers through a process of mitosis, which results in two daughter cells with identical sets of chromosomes. Students know that as multicellular organisms develop, their cells differentiate. Also Meets California High School Biology Standards: Organisms have a variety of mechanisms to combat disease. As a basis for under-standing the human immune response: Students know the role of the skin in providing nonspecific defenses against infection. Students know the role of antibodies in the body's response to infection. Students know how vaccination protects an individual from infectious diseases. Students know there are important differences between bacteria and viruses with respect to their requirements for growth and replication, the body's primary defenses against bacterial and viral infections, and effective treatments of these infections. Students know why an individual with a compromised immune system (for example, a person with AIDS) may be unable to fight off and survive infections by microorganisms that are usually benign. * Students know the roles of phagocytes, B-lymphocytes, and T-lymphocytes in the immune system.