The Microscope

Objectives State Objectives: 2 -Identifying components of the cell theory -Identifying cells as prokaryotic or eukaryotic Our objective: To understand and be able to use a microscope. To observe cells.

The Microscope Zacharias Janssen: He gets credit for the first microscope, in Middleburg, Holland, around the year 1595. Point: Since Zacharias was very young at that time, it's possible that his father Hans made the first one, but young Zach took over the production.

The Microscope

The Microscope Galileo: In 1609, (father of modern physics and astronomy), heard of these early experiments with microscopes and worked out the principles of lenses. He made a much better instrument with a focusing device.

The Microscope

The Microscope Anton van Leeuwenhoek: He made simple (one lens) microscopes. started as an apprentice in a dry goods store where magnifying glasses were used to count the threads in cloth. He taught himself new methods for grinding and polishing tiny lenses of great curvature which gave magnifications up to 270 diameters, the finest known at that time. These led to the building of his microscopes and the biological discoveries for which he is famous. Point: Leeuwenhoek was the first person to describe bacteria (from teeth scrapings), protozoans (from pond water), helped to prove the theory of blood circulation.

The Microscope

The Microscope Robert Hooke: His remarkable engineering abilities enabled him to invent and improve many mechanical devices, including timepieces (for which he invented the spiral spring), the quadrant, and the Gregorian telescope. Point: In Micrographia (1665), he coined the word cell to describe the features of plant tissue (cork from the bark of an oak tree) he was able to discover under the microscope. He also improved on Leeuwenhoek light microscope.

The Microscope

The Microscope Link Main link

The Microscope Lab Lab Sheet

The Microscope Practice Naming the Parts of the Microscope

The Microscope The perfect light microscope only allows us to see thing half the wavelength of light. We need to create an instrument to see smaller items.

The Microscope Electron Microscope: Co-invented by Germans, Max Knott and Ernst Ruske in 1931. Can magnify object up to a million times. Draw backs: No living organism can survive an electron microscope. We can’t see cell movements.

The Microscope

The Microscope Electron Microscope Pictures Modern Electron Microscope Jumping spider’s foot Ant and Tick

The Microscope Activity: Microscope Activity: Looking at your finger print Looking at the letter ‘e’