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Warm up 8/30/07. What did you discover from yesterday’s lab? Find the volume of the object in cm ³ and mL. 2 cm. 5 cm. 2 cm. Announcements. If you were absent be sure to check the grey folder in absent work bin to get stuff missed

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warm up 8 30 07
Warm up 8/30/07
  • What did you discover from yesterday’s lab?
  • Find the volume of the object in cm³ and mL

2 cm

5 cm

2 cm

announcements
Announcements
  • If you were absent be sure to check the grey folder in absent work bin to get stuff missed
  • If you leave anything here, it will be in the work passes back bin
  • If you bring in pennies before 1982 you will receive a no homework pass.
  • 1 penny = 5 pt homework pass
the metric system

The Metric System

In science class, we will be using the METRIC SYSTEM.

slide4
We use different measurements depending on how big or small and object is-

For example, you would use centimeters to measure a coin, and kilometers to measure the distance from San Marcos to Escondido.

We can change the standard unit using

pre-fixes

slide5
The prefixes are (from largest to smallest)
  • Kilo- K
  • Hecto- H
  • Deka- D
  • Unit- Meter, Liter or Gram
  • Deci- d
  • Centi- c
  • Milli- m
pre fixes
Pre-fixes

We can think of the prefixes like a stair step

Kilo

1000

Hecto

100

Deka

10

UNIT

Liter

Meter

Gram

1

Deci

1/10

Centi

1/100

Milli

1/1000

to help you remember
To help you remember

K H D U D C M

King Henry Died Unusually Drinking Chocolate Milk

converting
Converting

When you go down the stair to the right, you move the decimal over that many spaces in the same direction.

For example: convert 5.5 Dl to cl

K H D U D C M

5

5

3 spaces moved to the right, so move decimal point 3 to the right

5,500 cl

let s try another
Let’s try another

Convert .77 cg to kg

K H D U D C M

0

0

77

0

0

0

5 spaces to the left, so move decimal point 5 to the left

.0000077 kg

your turn
Your turn!

Convert 25 cm to Dm

K H D U D C M

0

2 5

3 spaces to the left, so move decimal point 3 to left

ANSWER: .025 Dm

again your turn
Again, your turn

Convert 12.6 km to dm

K H D U D C M

4 spaces to right = 126,000 dm

12 6

0

0

0

converting si units
Kilo

Hecto

Deka

Unit

deci

centi

milli

Converting SI Units

If you move down the stair step, you move the decimal to the right…

2.6 km = _260,000_ cm

2.6 km = _________ cm

If you move up the stair step, you move the decimal to the left

3,700 mm = ______ m

3,700 mm = __3.7__ m

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