Volume, Length and Mass

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Volume, Length and Mass

• And the tools that help you find them

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What do we measure?

• 5 things we measure in grade 7?
• Length
• Volume
• Mass
• Density
• Temperature

3
What do I measure?

• What do we measure using

Millimeters?
Length
Remember the milli- prefix only tells us size.
4
What do I measure?

• What do we measure using

Milligrams?
Mass
Remember the milli- prefix only tells us size.
5
What do I measure?

• What do we measure using

Milliliters?
Volume
Remember the milli- prefix only tells us size.
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What do I measure?

• What do we measure using

C
Temperature
7
Important Vocab

• Cohesion The attraction of the molecules of an
  object to each other. Example The way water
  forms a puddle.
• Adhesion The attraction of one object to
  another. Example The way drops of water stick
  to the side of an empty glass

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The Tools that Help

• We use many tools to help us measure mass,
  volume, temperature and length.

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Measuring Tools
What Am I?
1
Thermometer
What do I measure?
Temperature
2
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Measuring Tools
What am I?
Triple-Beam Balance
3
What do I measure?
Mass
4
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Measuring Tools
Middle slide weight adds 100 grams with each
notch.
Back slide adds 10 grams with each notch.
Front slide weight can be as accurate as .1 gram
Uses three beams for finding balance mass.
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Very, Very Bad
Marking the equipment in any way is UNACCEPTABLE
Do not disrespect the equipment
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Measuring Tools
What are we?
Beakers come in all sizes
Beakers
5
What do we measure?
Volume
6
14
Measuring Tools
Beakers have a spout for pouring.
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Measuring Tools
What am we?
Erlenmeyer Flasks also come in all sizes
Erlenmeyer Flasks
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They have flat bottoms
What do we measure?
Volume
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16
Measuring Tools
Great for Stirring!!
No spout here. You can plug/cap these.
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Measuring Tools
What am I?
Whats the Jump?
9
Spring Scale
11
200
What do I measure?
Mass
10
18
Practice a Bit?
JUMP ? of Spaces 200 ? 8 ??
13
25
Number of Spaces?
12
8
19
Practice a Bit?
16
50
425
14
17
700
975
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20
Measuring Tools
What am we?
Pipets draw liquid out of one canister in
measured amounts, usually to deliver to another
container.
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Pipet
What do we measure?
Volume
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Measuring Tools
What are we?
20
Graduated Cylinders
What do we measure?
Volume
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TD vs. TC
We look the same.
TD
TC
But we are different!
What does TC stand for?
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To contain
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How do we know?
The tool will be marked on the side
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How do we know?
Here you see the TD marking
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Scale practice
JUMP
1 ml 1 cc
What is this filled to.
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36 ml
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The Mighty Meniscus
Water is cohesive and adhesive. Clings to glass
on sides and climbs edge making a curved shape.
Read from the BOTTOM of the meniscus. Can make a
big difference!
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Measuring Partners
What am I?
Filler
24
Filler can be one of the many jobs of a beaker.
28
Proper pouring technique is very important.
Edges in Close contact with each other.
Notice the hand steadying the container
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Measuring Tools
What am I?
25
Overflow Canister
What do I measure?
Volume
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Measuring Tools
Excess water is collected by a volume measuring
device
Object placed in canister and water overflows out
spout.
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Tools not for Measuring
What am I?
27
Scalpel
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Tools not for Measuring
What am I?
Forceps
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These are not tweezers so dont call them that!!
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Tools not for Measuring
What am I?
Watch Glass
29
Use it curve side down and place items inside.
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Tools not for Measuring
What am I?
30
Dissecting Scissors
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Tools not for Measuring
We come in all shapes and sizes
What are we?
31
Microscopes
36
Tools not for Measuring
What are we?
32
Tongs
Not pronounced like the Cysco song!!
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Important!!

• Know these instruments
• You will be tested on them!!!