Thursday, September 5, 2013

Unit 1 Scientific Method: Day 14 - Measuring Sense – Estimating

BIG IDEA - What?
Being able to estimate length, mass, and volume is a great scientific skill that will allow you to make good hypotheses .

1) Identify the unit you will use and the benchmark.
2) Ask yourself: How many (benchmark) are in this unit?
3) Make your best guess and make sure – no
naked numbers!

Let’s Try as a Class
How many centimeters is this clothespin?
What benchmark do I use? Fingertip
How many fingertips are in the clothespin?
Estimate: 4.5 centimeters

             KIPPster Height
Benchmark: ______________________
Estimate: __________________________

Metric Benchmarks Helper

  A benchmark is anything that you are familiar with by size.  Here are some benchmarks (familiar objects) that I have provided for you to compare with metric units:

  Linear Measurement (Length, Height, or Distance):

  1 meter: From the doorknob to the floor
                A little more than 1 customary yard

  1 centimeter: The width of your pinky finger
                        The width of a large paper clip

  1 millimeter: The thickness of a dime

  1 kilometer:  About 3 times around a football field.
                        About 6-8 city blocks
                        About from the school to Mickey D’s.

   Weight - Mass

  1 gram: The mass of a small paper clip

  1 milligram: The mass of a grain of salt

  1 kilogram:  The mass of an average textbook
                        (A kilogram is a little more than 2 pounds in customary units)

  Liquid measurement - Capacity

  1 liter: A large Pepsi bottle
            Half a 2-liter bottle of soda
            A small pitcher

   1 milliliter: a drop from an eyedropper

Mnemonic Devices (things that help you remember)
KIPPsters (Kilo)
Become (Base)
Courageous (Centi)
Miracles (Milli)

   1. Complete Day 14  "Now You Try on Your Own" Classwork. 

   2. Watch Brainpop Video Below and answer the 5 questions on the Google Form.  

Click here to watch Metric Units Video

Measuring Sense Multiple Choice Lifework

You must:

·      Answer the question in your head before you look at the choices

·      Eliminate No Ways and Hot Stoves (the “tricky” answer)

·      Circle your answer


Mr. Wertz needs to weigh out exactly 50 grams of pennies for a math problem. What tool will she use?

a)    Graduated cylinder
b)   Pound scale
c)    Triple-beam balance
d)   Meter stick

1) A graduated cylinder could measure:

a)    The mass of a liquid
b)   The volume of a liquid
c)    The mass of a textbook
d)   The volume of a textbook

2) You cannot measure the volume of a liquid in a graduated cylinder while:

a)    Holding the graduated cylinder in your hand
b)   The liquid is hot
c)    Looking eye-level at the liquid
d)   The liquid is a color besides clear

3) Which of the following probably represents the mass of one penny?

a)    2 g
b)   1500 g
c)    2 kg
d)   2000 kg

4) Which of the following probably represents the length of this room?

a)    13 cm
b)   13 meters
c)    113 meters
d)   13 km

5) What unit would you probably use to measure the mass of an elephant?

a)    kilograms
b)   grams
c)    milliliters
d)   meters

6) How are volume and mass related?

a)    The bigger the volume of an object; the more its mass
b)   The smaller the volume of an object; the more its mass
c)    An object with a large volume always has a large mass
d)   None of the above

7) Which of these containers is most likely to be able to hold at least 500 mL?

a)    A test tube
b)   A beaker
c)    A pipette
d)   A graduated cylinder

8) Which of these is most likely to have a mass closest to 100 grams?

a)    A pencil
b)   The bin in the middle of your table
c)    A textbook
d)   Mr. Miller

9) Which of these is most likely to have a length closest to 10 centimeters?

a)    A pencil
b)   A textbook
c)    A table
d)   An eyelash

10) Which of these is not a base unit?

a)    Meter
b)   Gram
c)    Milliliter
d)   Liter

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