Lab Equipment - Ms Kim's Biology Class

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Lab Equipment
Goggles
• Most important
piece of lab
equipment)
• Protects eyes from
broken glass,
chemicals and
flames.
Length and Volume
• Meter Stick, Ruler
used to measure
Length.
• Graduated Cylinder,
Flask, Beaker used
to measure Volume.
Mass
• Balance
–Digital
–Triple beam
Digital Scale
• You must ZERO/TARE the scale before measuring mass.
TARE the balance with the
container first, then add
material to be
measured
(liquid/granules) You do
not want the mass of
the container in your
reading.
Measuring Mass
We will be using triple-beam balances
to find the mass of various objects.
The objects are placed on the scale and
then you move the weights on the beams
until you get the lines on the right-side of
the scale to match up.
Once you have balanced the scale, you add up
the amounts on each beam to find the total mass.
What would be the mass of the object measured
in the picture?
70
300 + _______
3.4
373.4 g
_______
+ ______
= ________
Top Image: http://www.southwestscales.com/Ohaus_Triple_Beam_750-SO.jpg
Bottom Image: http://www.regentsprep.org/Regents/biology/units/laboratory/graphics/triplebeambalance.jpg
Measuring Mass – Triple-Beam Balance
1st – Place the film canister on the scale.
2nd – Slide the large weight to the right until the arm drops below the
line. Move the rider back one groove. Make sure it “locks” into place.
3rd – Repeat this process with the top weight. When
the arm moves below the line, back it up one groove.
4th – Slide the small
weight on the front
beam until the lines
match up.
5th – Add the amounts on each beam to find the total mass to the nearest tenth of a
gram.
Beaker
• Measures liquids
(but not very accurately)
• May be heated
• Used to hold or
mix chemicals
Stirring Rod
• Glass rod used
for stirring
• BE CAREFUL!
They break
easily
Erlenmeyer Flask
• Measures liquids
(but not accurately)
• May be heated
• Used for mixing
• Has a cone-shaped
container with neck, so you
can hold the flask (to stir) or
attach a clamp or use a
stopper.
Graduated Cylinder
• Measures
volumes of
liquids
accurately
Test Tube/Test Tube Rack
Test Tube: May be heated
Mix chemicals
Holding small amounts of
chemicals
Test Tube Rack: Holds test tubes
in a vertical position.
Allows for clear sight.
Drying rack
Test tube holder: It holds a
test tube
Wire Gauze/Funnel/Loop
• Wire Gauze:
Spreads out the
heat produced by
a Bunsen burner
Inoculation
Loop:
A tool used to
transfer and
spread
microorganisms
to a petri dish.
Funnel: Holds filter
paper for filtering
solutions.
Transferring liquids to
smaller narrow necked
containers
Mortar and Pestle/ Plastic Wash
Bottle/Forceps/Crucible Tongs
Mortar and Pestle:
• Used for grinding
crystals
Plastic Wash
Bottle:
• Dispenses water
for rinsing
equipment
Forceps:
• Used to pick
up small
items.
Crucible Tongs:
Pick up and hold
small hot items
like a crucible.
Bunsen Burner (&
Striker)
• Controls release of
natural gas for
burning.
• Surgical tubing
connects to gas
source.
• Striker with flint is
used to ignite the
burner
Rubber Stopper/Scoopula/Test Tube
Brushes/Pipette
Test Tube
Rubber Stopper:
• Covers test tube
for mixing
Scoopula:
Used to transfer
solids from one
container to
another
Brushes:
Used to
clean out the
test tubes
Pipette:
A narrow tube
into which
small amounts
of liquid are
suctioned for
transfer or
measurement.
Petri Dish, Microscope slide and cover slips, and
Microscope
Petri Dish:
A shallow circular
dish with a loosefitting cover, used to
culture bacteria or
other
microorganisms.
Cover Slip:
A very thin piece
of glass placed
over a specimen
on a glass slide
that is to be
examined under
a microscope.
Microscope:
Microscope slide: A small, flat
rectangular piece of glass on
which specimens can be mounted
for microscopic study.
An
instrument
used to see
objects that
are too small
for the naked
eye.
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