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Credit: 2008 http://sciencespot.net/

Agenda, October 1 2013

} Aim: Students will be able to correctly convertmeasurements in the metric system by the end of

todays lesson

} 1. DO NOW: Watch the Video on MetricConversions and complete a See-Think-WonderChart in your notebooks

} 2. Metric System Power-point} 3. Group work on related practice problems} 4. Exit slip on metric conversions} 5. Sage on the Stage

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}Metric Conversions

Credit: http://sciencespot.net/

Metric Conversion Video

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KILO

1000

Units HECTO100

Units

DEKA

10

UnitsDECI

0.1

UnitCENTI

0.01

Unit MILLI0.001

Unit

MetersLiters

Grams

Ladder Method

How do you use the ladder method?

1st Determine your starting point.

2nd Count the jumps to your ending point.

3rd Move the decimal the same number of

jumps in the same direction.

4 km = _________ m

1

23

How many jumps does it take?

Starting Point Ending Point

4.1 __.2 __.3 __. = 4000 m

King

HenryDoesnt

[Usually]

DrinkChocolate

Milk

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There are 100 centimetres in 1 metre

When we change from cm to m we divide by:-

Remember!

When we divide by 100 the units move two places to the right.

H T U th hth th

4 2 7 0 100

This is how we change 427cm into metres:-

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There are 100 centimetres in 1 metre

When we change from cm to m we divide by:-

Remember!

When we divide by 100 the units move two places to the right.

H T U th hth th

4 2 7 0 100

This is how we change 427cm into metres:-

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There are 100 centimetres in 1 metre

When we change from cm to m we divide by:-

Remember!

When we divide by 100 the units move two places to the right.

H T U th hth th

4 2 7 0 100

This is how we change 427cm into metres:-

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Therefore:-

427cm = 4.27mH T U t h th

3 2 6

H T U t h th

3 2 6

H T U t h th

4 7 6

H T U t h th

1 6 5 3

H T U t h th

0 4 7 6

H T U t h th

1 6 5 3

100

100

100

cm m

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Try these conversions using the ladder method.

1000 mg = _______ g 1 L = _______ mL 160 cm = _______ mm

14 km = _______ m 109 g = _______ kg 250 m = _______ km

Conversion Practice

Compare using , or =.

56 cm 6 m 7 g 698 mg

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Closing Question

}What is the volume of all the human blood in the world?Use the following approximations to estimate your

answer: 1 gall/ person , 6 billion people in world, 7.5 gal

per cubic feet. (Extension: Determine how big of a cube

all the blood fit could into)or

} How old are you in seconds? Compare your age inseconds to that of your team members and put your ages

in ascending order. (Extension: Determine how old theManhattan bridge is in seconds (Hint: Find out which date

the bridge was completed)