Microscopy

Cards (11)

What are microscopes
Microscopes are tools that allow us to see the unseen world
What are the two different types of microscopes
Light microscopes
Electron microscopes
What do light microscopes do
They use light and lenses to magnify specimens, allowing us to see individual cells and large subcellular structures like nuclei
What do electron microscopes do
They use electrons to form an image and can magnify much more than light microscopes, they show us finer details of cell structures like mitochondria and chloroplasts
What is magnification
How much larger the microscope makes the object appear
How to calculate magnification
magnification = Size of image/size of real object
How to convert micrometers the millimeters
Micrometres x1000 = millimetres
Viewing onion cells
Start with a clean microscope slide
Add a single drop of water
Peel off the epidermal tissue and place it on the slide
Add a drop of iodine solution
Place a cover over the specimen
What does the coarse adjustment knob do
Finds the focus of what were looking at
What does the fine adjustment knob do
Fine-tunes the focus for a clearer image
How do we draw observations
With a pencil
Take up at least half the space provided
Use clear unbroken lines, and avoid shading or colouring
Draw proportionally
Label key aspects with straight lines
Include title and magnification level