Download presentation
Presentation is loading. Please wait.
Published byLuke Shanon Porter Modified over 9 years ago
2
Before we had customary and metric units people measured various things with their body parts. Examples: A. How many hands tall is the horse you are buying? B. One yard of fabric is the distance from your thumb to your nose.
3
Finger- the width across your first finger Hand- the width across your hand with your fingers together. cubit- length of your arm from the end of your middle finger to your elbow
4
Pace- length of a step or stride Fathom- distance from fingertips of left hand to right hand with arms outstretched Inch- distance from the tip of your thumb to the first knuckle.
5
Yard- distance between thumb and nose with hand extended (stretched out) Span- distance between the tips of the thumb and little finger with hand extended (spread apart)
6
Measure the classroom objects and record on the class data table.
7
Will each student’s measurements of classroom objects be the same? Example: If we measure classroom objects with non-standard units, everyone will get the same answer.
8
ObjectUnitsMeasurement TextbookFingers TableHands ChairCubits Width of ClassroomPace Length of ClassroomFathom
9
Was the class data the same as yours? Why or why not? When might you use one of these units to take a measurement? State one problem you found using these nonstandard units in measuring classroom objects.
10
Or for those of you who speak English… The international system
11
This is the metric system Every other country uses metric. The Unites States is one of the only nations that still uses the customary system. WHY do you think we don’t use the SI or metric system?
12
For every metric unit, there is a base unit What you want to measure Unit you use LengthMeter MassGram VolumeLiter TimeSecond TemperatureCelsius
13
A prefix is a part of a word that is added onto another word to make it have a new meaning For the basic units there are prefixes to tell us how big or small they are Example: pre-test, mis-spell, re-write
14
If we want to decrease in size, we use milli- 1,000 times smaller I like to think of Milli Mouse
15
Then comes Centi- 100 times smaller Think of Centi Cat
16
Finally, there is Deci- 10 times smaller (pronounced De-see) This is Deci Dog
17
If we want to increase in size, we can use Deca- 10 times bigger This is Deca Dolphin
18
Next, we increase in size by 100- Hecto This is Hecto Hippo
19
Finally, we have Kilo- 1,000 times bigger This is Kilophant
21
Choose 3 of the following with your group and write them in your table: 1. Meter 2. Hand 3. Toothpick 4. Pencil 5. Person 6. Centimeter 7. Pace
22
Which of these units is standard? Which are nonstandard? Which units are metric?
23
What pattern do you see? What do you infer? How did your understanding of measurement units help you prove or disprove your prediction? Discuss any problems that would explain unexpected results. Give suggestions for improving the activity.
24
Write one or two sentences that state whether or not your data supported your prediction
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.