STC Microworlds: Goals
In this unit, students investigate both living and nonliving specimens with a variety of magnifiers, including the microscope. Their experiences introduce them to the following concepts, skills, and attitudes.
- In order to magnify, a lens must be transparent and curved.
- Magnification is directly related to how much a lens is curved.
- Higher magnification reveals more detail in a smaller area of a specimen being observed.
- In light microscopes, lenses are combined to focus light and increase magnification.
- Scientists designed and used early microscopes to extend their observational ability and to investigate their ideas.
- Some living organisms are too small to see without magnification.
- All living things are made of at least one cell.
- When magnified, all cells have observable structures.
- Microorganisms are widespread in nature.
- Bacteria are partly responsible for the decomposition of organic material over time.
- Some bacteria are eaten by other microorganisms.
- Like all organisms, microorganisms grow and reproduce.
- Microorganisms have structures that help them survive in specific environmental conditions.
- Changing environmental conditions promote the survival of some microorganisms over others and therefore change microbial communities.
- Determining which of various objects can magnify.
- Using magnifiers, including hand lenses and microscopes, to observe living and nonliving specimens.
- Using appropriate equipment and techniques to prepare microscope slides for viewing.
- Using a microscope to observe basic cell structure.
- Communicating detailed observations through writing, drawing, and discussion.
- Making measurements of small objects using hair-widths and millimeters.
- Exploring ways to slow the movement of living microscopic specimens for closer observation.
- Developing an interest in exploring microscopic specimens.
- Recognizing that microorganisms have many of the same needs as other living things.
- Developing an awareness of the diversity and complexity of microbial life.
- Developing an awareness of the interactions among living things and between living things and their environment.