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20 Cards in this Set

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Microscopes
tools that extend human vision by making enlarged obj
tools
objects used to improve the performance of a task
compound light microscope
shines light through a specimen
has two lenses to magnify
Four major parts to the microscope
eyepiece (ocular lens)
objective lens
stage
light source
eyepeice
usually magnifies 10X
objective lens
enlarges the image of the specimen
sometimes uses stains
stage
platfor tha that supports the specimen
slide is placed over the opening in the stage
light source
bulb
light reflected with a mirror
incandecent light from a lamp
magnification
is the increase of an object apparent size
nosepiece
structure that holds the set of objective lenses
compound microscope obj lens
produces images up to 100 X
resolution
is th power to show details clearly in an image
physical properties of light limit light microscopes to resolve images
electron microscope
a beam of electrons produses and enlarge image of the specimen
always in Band W
more powerful
scanning electron microscope
SEM
passes a beam of electrons over the surface of the specimen
Transmission Electron microscope
TEM transmits a beam of electron through a thinly sliced specimen
great resolution
200,000 times magnification
Metric System
decimal system and thus is based on powers of 10
System International dUnites
SI
Base Units
secen fundamental units that describe length, mass, time, and other
Devrived units
produced by the math relationships between two base units
lab safety
good lab practice
common sense habits
hello
hey