Transcript Today’s Agenda 10/21

TODAY’S AGENDA 10/21
UNIT 3: Metric System
FTF - Think – Pair – Share
(You and your buddy will each need 1 piece of paper for today’s FTF!)
Think: (Alone)
1. What is weight? When you step on a scale, what are you actually measuring.
2. Have you ever heard of mass? What do you think it is?
Pair: Talk with your buddy and together come up with definitions for mass
and weight.
Share what you came up with with the class!
TODAY IN SCIENCE CLASS –
New Buddies
Review FTF
Mass vs Weight Brain Pop
Mass 2-column notes
Gravity Exploration In-Class Work
Ticket to Leave
Homework: Gravity Exploration Worksheet
SWBAT Differentiate between mass & weight; identify what an objects weight
& mass would be on Earth versus the moon.
MASS
2-COLUMN NOTES
MEASUREMENT-A COMMON LANGUAGE
Mass
MASS
MASS


The measure of the amount of matter an object
contains
Matter: The material that all objects and
substances are made up of

Anything that has mass and takes up space is matter
MASS
Units of Mass
THE BASIC UNIT OF MASS IN THE
SI SYSTEM IS THE…

The basic unit of mass in the SI system is the
kilogram.
WHAT ARE THREE OBJECTS (OTHER
THAN IN THE BOOK) WHOSE MASSES
WOULD BE MEASURED IN
KILOGRAMS.

Car

Teacher’s Desk

Desk Top Computer
A SMALLER OBJECT’S MASS
SUCH AS A PAPER CLIP WOULD
BE MEASURED IN

Smaller objects such as a paper clip would be
measure in milligrams or grams.
MASS
2-COLUMN NOTES
MASS
The Difference Between Mass and Weight
HOW WOULD YOUR WEIGHT DIFFER
IF YOU WERE TO TRAVEL TO THE
MOON?



If you were to travel to the moon your weight
would be less.
Your weight would be lesser because the force of
gravity is less.
Weight is a factor of the force of gravity
WHY WOULD YOUR MASS STAY
CONSTANT IF YOU WERE TO TRAVEL
TO THE MOON?


Your mass would stay the same if you were to
travel to the moon because mass is the amount of
matter that an object contains
Since you are still made up of the same amount of
“stuff”, your mass would not change
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
 READING CHECKPOINT (PAGE
49): WHAT IS WEIGHT?

The measure of the force of gravity acting on an
object
WHAT’S IT’S MASS?
If an object has a mass of 60 kg on Earth what
would it’s mass be on the moon? On jupiter?
 If an object weighs 100 lbs on Earth would it
weigh more or less on the moon? On Jupiter?
 What is the difference between mass and weight?

CONVERSIONS
1 kg
=
g
1g
=
mg
CONVERSIONS
1 kg
=
1g
=
1,000 g
mg
CONVERSIONS
1 kg
=
1,000 g
1g
=
1,000 mg
MASS
Measuring Mass
TODAY’S AGENDA 10/22
UNIT 3: Metric System
FTF (Homework Out Please!)
Working Independently on 1 piece of paper & using complete sentences
1.In
3-4 sentences describe the difference between mass and
weight (definitions are okay).
2.If an object has a mass of 53 kg, what would its mass be on the
moon? On Jupiter?
3.If an object has a weight of 500N (N = Newtons) on Earth
would it be the same on the moon? Explain why or why not.
TODAY IN SCIENCE CLASS –
Review FTF
Review Homework
Mass Lab Station 1 - Double Pan Balance
Ticket to Leave
Homework: Picnic in the Park/Double Pan Balance
SWBAT Correctly calculate the mass of 5 objects using a double pan balance
and a digital balance.
USING A DOUBLE PAN BALANCE
1.
2.
3.
4.
5.
Set the balance
needle to 0
Place the object you
want to measure in
one pan.
Place the mass
standards in the
other pan until the
needle is balanced.
Add up the total
amount of mass
standards in the
other pan.
This equals the
mass of the object.
MASS LAB STATION 1 - DOUBLE PAN
LAB
PROCEDURE
 Select 5 objects (golf ball, glue stick, gem, screw & marble).
 Make sure the balance is set to 0 (the needles is aligned).
 Choose 1 object and place it on the left pan of the balance.
 Estimate the mass of the object. Record on data table.
 Place standard masses on the right pan until it is balanced.
 Add up all standard masses on the right pan.
 Record sum in data table.
 Repeat with remaining 4 objects.
If you finish early move on to Station 2 – digital balance!
TICKET OUT
Describe the steps of using a double pan balance.
 Pretend you traveled to the moon and did this
same lab. How would your results change?

TODAY’S AGENDA 10/23
UNIT 3: Metric System
FTF (Homework Out Please!)
Metric Check (would you use mg, g or kg to measure these things?)
1.A football players weights approximately 100 __________.
2.The recipe called for 5 _____ of salt.
3.My new truck has a mass of over 1000 _______.
4.The hamsters has a mass of about 200 _________.
5.The doctor said to take 8 _____ of the powdered medicine.
Video on using triple beam balance
http://vimeo.com/7886271
TODAY IN SCIENCE CLASS –
Review FTF
Review Homework
A Block Only - complete Station 1
2-column notes – Using A Triple Beam Balance
Mass Lab Station 2 & 3 – Triple Beam Balance
Ticket to Leave 3 – 2 - 1
Homework: Triple Beam Balance Worksheet
SWBAT Correctly calculate the mass of 5 objects using a triple beam balance
and a digital 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.
2.
3.
Set balance to 0.
Place the object on the pan
Shift the riders on the beams until they 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 0.1)
FIGURE 3: OBSERVING - WHAT IS
THE MASS OF THIS TURTLE?
 153.7
grams
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
MASS LAB STATION 2 & 3
Activity 2 – Digital Balance
1. Make sure the scale is zeroed when you begin
2. Place object on scale
3. Record mass in data table.
Activity 3 – Triple Beam Balance
1. Use the same objects from activities 1 & 2
2. Set all riders to 0 and make sure the scale is
balanced!
3. Place the first object on the pan
4. Move the riders until the object is balanced.
5. Add the mass of all riders.
6. Record the total mass in the data table.
When you finish lab complete the Post Lab Questions! If
you finish that, work on homework.
TODAY’S AGENDA 10/24
UNIT 3: Metric System
FTF (Homework Out Please!)
Distribute study guide & set quiz goals.
C Block & A Block – Finish Mass Lab
TODAY IN SCIENCE CLASS –
Review FTF
Review Homework
Skittles Lab w/ partner
Review for Quiz
Ticket to Leave 3 – 2 - 1
Homework: Study for Quiz AND Mass Lab Due Tomorrow!
SWBAT Demonstrate mastery of using a triple beam balance during a handson activity; calculate the mass of 5 small objects using a triple beam balance.
SKITTLES LAB
Using a triple beam balance, you will find the
mass and other attributes of skittles candy.
 Procedure






Find mass of unopened bag & record on table 1.
Open bag. Count total number of each color. Record
on table 2.
Select 1 skittle of each color and set aside.
Beginning with red, find the mass of 1 skittle of each
color. Record on table 2.
Repeat previous step with other colors.
When Finished – Begin working on lab questions
and graph!
TICKET OUT
3-2-1
3 ways to find the mass of an object
2 units used to measure the mass of objects (think
very large item like a car and a smaller object
like a stapler)
1 word that describes the amount of matter in an
object.
TODAY’S AGENDA 10/25
UNIT 3: Metric System
FTF (Turn in Mass Lab!)
Quiz Today!
TODAY IN SCIENCE CLASS –
Quiz – be quiet, be private, do your best!
When finished:
Complete Skittles Lab!
Begin “Eureka Density” Assignment (due Tuesday)
If all students finish: Density 2-column notes
Homework: Skittles Lab Due Monday!
SWBAT Demonstrate knowledge of metric mass by taking a summative
assessment.