Before we begin…Try SORTING these as you see fit!
Here’s how Mr. Myung sorted these!
VS
Living and non-livingWhat are the requirements of “LIVING”?
It MUST have all these characteristics
1. Respond to its environment
2. Needs energy
3. Grow
4. Reproduces
5. Get rid of wastes that build up in its body
The Living
All living things are made of one OR more cells
Try listing 3 organisms for each of the following!Unicellular Multicellular
Closer look at the “living”
Trying to see unicellular organismsSometimes, we don’t need any help!
But often times, we can’t see unicellular organisms with just our eyes
World’s largest single cell video
Types of microscopes1. Simple microscope
1. Single Lens2. For example, a magnifying glass3. Generally, 10~20x magnification
Antony Van Leeuwenhoek’s microscope
~270 times magnification
Types of microscopes2. Compound Light Microscope
1. Two or more Lenses2. For example, a typical laboratory microscope3. Maximum of 2000x magnification
Types of microscopes3. Electron Microscope
1. VERY powerful microscope used for scientific researches2. Magnification of 10,000,000x3. Maximum of 2000x magnification
Closer look at compound light microscopesDefinition: compound = more than two
Therefore… Compound light microscope = Microscope with more than two lenses that uses light
A microscope has “magnifying power” and “resolving power”
Magnifying powerWhat is… 2 x 3 =
Let’s suppose that we had …
1. A magnifying glass that makes things look 2x bigger. 2. Another magnifying glass that makes things look 3x bigger.
What would happen if we look through BOTH magnifying glasses?
Magnifying powerCompound light microscope that we will use uses TWO lenses at a time.
Eye piece lens: 10x
3 objective lenses: LOW power: 4x MED power: 10x HIGH power: 40x
Resolving powerAbility to distinguish between two separate objects that are close together
With higher magnification, we get higher resolving power
Try to distinguish between two pieces of hair ants have.Human eyes have limited resolving power, so we use microscopes
