Microscope Flashcards
With what can cells be seen and why
With an expensive instrument , microscope - they are too small for the eye / maginifyung glass
What does the microscope allow us to see
Things in greater detail
Who was Anton van Leeuwenhoek
Dutch microscope maker , first person to see living cells
Who was Matthias scheledian
German botanist , discovered all plants were made of cells
Who was Theodore Schwann
Showed all animals made of cells
What is a dissecting microscope
View larger specimens , shows organism as a whole
What is a compound microscope
Shows cells , collects light to view objects
What is an electron microscope
Shows greater detail of cells. Uses higher maginification
What so lenses do
Magnify image on small objects
Where are the lenses
At both ends of body tube
Where is the lens at which you look through and what is it called
Top of the body tube called the eyepiece / occulsr lense
What are the lenses at the top of body tube called
Objective lense
There are usually 3 objective lenses on a round part called what
Nosepiece
What does a nosepiece do
It turns so you can see objective lenses with different magnifications
What is the number on the side of each objective lense
The magnification
Describe the shortest lense and what’s it called
Lowest magnification , the low power objective lense
Describe the longest objective lens and what it is called
Has the highest magnification , called the high power objective lense
Where are the focusing nobs
On the side of a microscope
What is the larger focusing nob called
Coarse adjustment knob
What is the smaller focusing nob called
Fine adjustment knob
What is the platform called
The stage
What do the two stage clips do
Hold a slide in place so that the object on the slide is placed directly over the hole in the middle of the stage
Where is the light source
Underneath the stage below the diagroham
What does the diaphragm do
Controls amount of light over hole
Where is the condenser lens
Above the diaphragm
What does the condenser lens do
Concentrates the light from the light source into a very bright beam
What does the bright beam do
Shines up through the hole in the stage
What is the eyepiece
The lense you look through at the top
What is the stage
A flat platform where you place slides for viewing
What is the stage clips
Holds the slide in place
What is the diaphragm
Used to vary intensity and amount of light
What is the lower power objective
Lense with the lowest power magnification
What is the coarse adjustment knob
Moves stage up and down for initial focusing
What is the fine adjustment knob
It adjusts the focus
What is the high power objective
Has the greatest amount of magnification
What is a compound lense
Uses 2 lenses an eyepiece lense and objective lense to maginify object ( each lense has its own maginifying power)
What is does the total maginifying power
Power of eyepiece lense x power of objective lense
Why does an onion cell have no chloroplast
It is underground , there is no photosynthesis
What are the bodies of most organisms made of
Building blocks called cells
