Science Focus Topic 2 Notes: Microscopes and Cells | | Print | |
A World Too Small To See ?
Early Microscopes ? - micro-organisms were first discovered by Anton van Leeuwenhoek. His hobby of grinding lenses led him to eventually make the first simple microscope to study blood
samples, pond water and plaque (which he scraped from his teeth)
The organisms he found ? that were single cells ? he called ?animalcules? Cells in All Living Things ? - Two scientists (Matthias Schleiden and Theodore Schwann) who studied cells combined
their observations to make a hypothesis ? all living things are made up of cells.
Microscopes Today ? - Technology improvements have lead to the development of compound light microscopes
(2000X magnification) and electron microscopes (2,000,000X magnification). - The microscope has become a valuable tool for the See the electron microscopic images on page 114
Topic 2 Review p. 114 |