Standard #1
Select appropriate lab glassware,
balances, time measuring equipment
and optical instruments to conduct
an experiment
The SI System
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The SI system is the metric system.
SI stands for System International since it is
used all over the world
Length is measured in METERS
Weight or mass is measured in GRAMS
Volume is measured in LITERS
Temperature is measured in Celcius
Length Measurement
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Length is measured in meters or parts of
a meter
1 meter is a little linger than a yard stick
Weight Measurement
We weigh things on an balance or scale
Appropriate Measuring Equipment for
Science Labs
 Volume is the amount of space a
liquid or object takes up
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Beakers
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Flasks
Graduated Cylinders
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Beakers are better for measuring large
amounts of liquid. They do not give a very
precise measurement.
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Looking at this beaker you can see that it
would be hard to measure accurately
measure 150 mL because there isn’t a line
there.
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Graduated Cylinders are good for accurately
measuring small amounts of liquid.
You can see that there are
lines for each mL
It is easy to tell 10mL form 30 mL
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Flasks are used to measure & stir
hot/boiling or dangerous chemicals. The
small opening or neck cuts down on splashes
that could burn you or damage your skin.
Measuring The Volume of an
Object
If you put 40ml of water in a graduated cylinder & then drop a
marble in it, the level of the water will go up. The number of mL
that the volume goes up is equal to the volume of the marble.
Water line
Is at 40mL
Marble is
put in the
cylinder
marble
Water is now at
50mL so the
volume of the
marble is 10mL
Petri Dishes
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These are used to grow bacteria.
Nutrient AGAR ( jelly like stuff that bacterial grows
in) is put in the bottom of the dish
The red stuff is the
agar
This petri dish has bacteria
growing in it.
Hand Lens & Microscopes
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We use a hand lens (magnifying glass) to
see things that are small easier.
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Microscopes are used to
see & measure things that
are too small to see with
just your eyes or even with
a hand lens
Types of Microscopes
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Compound Microscope – uses light to see
through something
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Good things
Bad Things
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– you can see living things
you can see things in color
you can’t see extremely tiny things
Electron Microscope- uses electron beam
to see something
Good things – you can see extremely tiny things
Bad things – the electron beam kills the creature
the image is not in color
Stop Watch
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A Stop watch is used to record accurate time
in a science experiment just like it is in a track
meet.
 Which
piece of equipment can
BEST measure the volume of
ink in a pen?
 A. 10mL beaker
 B 10ml graduated cylinder
 C. 100 mL beaker
 D. 100mL graduated cylinder
B is correct
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There is not much ink in an ink pen so you
would need something small to measure it.
A graduated cylinder has tiny lines for each
mL. A beaker just has a line for every 10 mL.
Graduated cylinder
Beaker
 Students
are using boiling water
in a lab experiment. What type of
glass ware would the use?
 A. Flask
 B. pipette
 C. Graduated cylinder
 D. Petri Dish
A Flask
 Because
of the shape of a flask
( the skinny neck) the materials
inside are less likely to splash out
on the students
 Which
tool can be used to
MOST accurately determine
the volume of a paper clip?
 A graduated cylinder
 B. beaker
 C. electronic balance
 D. ruler
D
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graduated cylinder
To determine the VOLUME of the paper clip,
you would see how much water it displaced.
Measure the amount of water before the
paper clip is added & then again after you put
the paper clip in. The difference is the volume
of the paper clip.
If you are still confused go back to slide #8
 In
addition to a watch, what
other tool can be used to
determine how fast a singlecelled organism moves?
 A. magnifying glass
 B. electron microscope
 C. pipette
 D. compound microscope
D. Compound microscope
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This is the only equipment that you could
SEE a one celled organism through that
doesn’t kill it.
An electron microscope kills the things that
you are looking at so you couldn’t watch it
move.
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Which tool should be used to MOST
accurately measure 22.0 mL of liquid?
B graduated cylinder
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This is the only one that has tiny marks to
MOST accurately measure the liquid.
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A student wants to grow bacteria on solid
nutrient agar. Which type of glassware is
MOST appropriate for this procedure?
B is correct
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Petri dishes are used to grow bacteria & are
filled with nutrient agar ( jelly like stuff) which
serves as food for the bacteria
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Which graduated cylinder should be used
to MOST precisely determine the volume
of a marble?
B.
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This is because Cylinder B is the only one
that has a mark or line for EACH ML