Transcript Measurement-A Common Language

Bell Ringer:

On a sheet of paper please answer the
following questions. Do all bell ringers on
the same sheet of paper!

1. What is the definition of Biology?

2. What are the 8 characteristics of life.
A Common
Language
Why A Standard Measurement System?
When and why was the
metric system invented?

The metric system was invented in 1790

The metric system was invented because
countries were using many different systems
of measurement causing confusion and lack of
consistency

The metric system was invented by a group of
French scientists
 aunes,
cubits, leagues, palms, stadia,
furlongs, rods, pecks
Metric System
A
system of measurement used by
the majority of countries on Earth
based on the number 10
 Countries
• System…
that don’t use the Metric
Liberia, Myanmar, and United States
Scientists all over the world
use the International
System of Units to measure:
Length
Volume
Mass
Key Concept: Why do scientists
use a standard measurement
system?
 Allows
scientists to compare data and
communicate with each other about
their results
 Also
allows experiments to be
repeated
Length
What is length?
 Length
is the distance from
one point to another
The basic unit of length in the
Metric System is the …
Meter
(m)
Length
MEASURING LENGTH
TOOLS: METER STICK AND RULER
The longer lines on the metric
ruler are called…

centimeters
The shorter lines on the metric
ruler are called…

millimeters
Figure 2: Calculating: Measure the
turtle in figure 2 from the rear of its
shell to the front of it’s shell. Record
its length in both centimeters and
millimeters.

8.8 cm

88 mm
Mass
Mass
 The
measure of the amount of
matter an object contains
The basic unit of mass in the
Metric System is the…
Gram
(g)
Mass
Measuring Mass
Tool: Triple Beam Balance
How does a triple-beam
balance work?

A triple-beam balance works by
comparing the mass of the object you are
measuring to a known mass

When you use a triple-beam balance, you:
1.
Place the object on the pan
2.
Shift the riders on the beams until them balance
the mass of the object
•
Start with the large rider (increments of 100)
•
Next, the medium sized rider (increments of 10)
•
Lastly, the small rider (increments of 1)
Figure 3: Observing - What is
the mass of this turtle?

153.7 grams
Why do scientists prefer to
use the mass of an object
instead of its weight?

Scientists prefer to use an objects mass
instead of its weight because mass does
not change when the force of gravity does
Label the different parts of
the triple-beam balance.
Label the different parts of
the triple-beam balance.
Pan
Label the different parts of
the triple-beam balance.
Pan
Riders
Label the different parts of
the triple-beam balance.
Pan
Riders
Beams
Label the different parts of
the triple-beam balance.
Pan
Riders
Beams
Pointer
Volume
Volume

The amount of space an object takes up
The basic unit of volume in the
Metric System is the… …
Liter
(l)
The Tool used to measure the
volume of liquids is called the…
 Graduated
cylinder.
This instrument has markings
that are in increments of…
1
milliliter (mL)
Meniscus
 The
curve in the top surface of water
in the graduated cylinder
Figure 4: Observing - What
is the proper way to read a
meniscus?

Read the milliliter
marking at the
bottom of the
curve
Volume
Volume of Rectangular Solids
How can the volume of a solid
object such as a shoebox be
measured?
To
measure a solid objects that are
regular shaped, a formula for volume
can be applied
The Metric System unit known
for measuring solids with a
larger volume is known as the…

Cubic meter (m³)

Cubic centimeter (cm3)

Cubic millimeter (mm3).
Tool:
The formula for calculating the
volume of a rectangular object
is:
Volume = Length x Width x Height
Why is the unit cm³ used when
calculating the volume of a
rectangular object?

When multiplying the object’s length, width
and height, the cm units are also multiplied
cm x cm x cm = cm³
Suppose a cereal box is 10 centimeters
long, 4 centimeters wide, and 20
centimeters high. What would be the
volume of the box?

Volume = Length x Width x Height

Volume = 10 cm x 4 cm x 20 cm

Volume =
Volume
Volume of Irregular Solids
How is the volume of an
irregular solid such as a rock
measured?

To measure the volume of an irregular
solid, immerse the object in water, and
measure how much the water level rises

Tool (Method) : Water displacement
method using a Graduated Cylinder
Basic Unit of Volume for
Irregular Solids =
3
L
3
cL
mL3
How does the water
displacement method work?

Record the volume of water in the
graduated cylinder

Carefully place the irregular solid into the
water. Record the volume of the water
plus the object

Subtract the volume of the water alone
from the volume of the water plus the
object
To convert to a smaller unit, move the decimal point to the right
Kilo
1000
Units
Hecto
100
Units
Deka
10
Units
To convert to a larger unit, move the decimal point to the left
Basic Unit
1 Meter
1 Liter
1 Gram
Deci
0.1
Units
Centi
.01
Units
Milli
.001
Units
King Henry Died Basically Drinking Chocolate Milk
TRY THIS USING THE
STAIRCASE METHOD
1 g
1000 mg = ______
Step 1: Determine if you are going to go up or down the ladder.
Step 2: Determine how many steps there are from milligrams to
grams.
Step 3: Move the decimal point the amount of places that was
determined in steps 1 & 2.
TRY THIS USING THE
STAIRCASE METHOD
.15 L = __________ ml
TRY THIS USING THE
STAIRCASE METHOD
150
.15 L = __________
ml
Bell Ringer
1. What are the basic units of measurements for
• Length
• Volume
• Mass
2. Convert 1.5 km to m
3. Convert 120 ml to cl
4. What tool would you use to measure mass?
5. What is the formula for figuring volume of an rectangular
shaped object?