1. Scientific Measurements
The metric system

2. Metric Prefixes Kilo = 1000 Hecto = 100 Deka = 10 Deci = 1/10
Centi = 1/100
Milli = 1/1000

3. Meters, Liters, Grams Meters measure length Liters measure volume
Grams measure mass

4. How Big? A meter is about 39 inches A kilometer is 0.6 mile
A centimeter is about the width of your little finger
A gram is about the mass of a paper clip
A kilogram is 2.2 pounds
You drink 2 liters of pop

5. Other metric units
Temperature is measured in degrees celsius or centigrade
Heat/energy is measured in calories or joules
Weight is measured in Newtons
Mega = 1,ooo,ooo
Micro = one millionth
Nano = one billionth

6. K H D O D C M
Changing from one metric unit to another is called metric conversion
“O” is the space where meter, liter, or gram (the “base unit”) belongs
Kids Have Dropped Over Dead Converting Metrics
Let’s practice!

7. K H D O D C M
To change from one metric unit to another, we simply move the decimal point.
For example:
25.4 km = _____________ cm?
K-H-D-O-D-C is 5 places to the right
25.4 km = 2,540,000 cm

8. K H D O D C M 30 cm = ___________hm
C – D- O –D- H is 4 places to the left
30 cm = hm
(this is the same as hm)
14 dkl = _____dl
D- O –D is 2 places to the right
14 dal = 1400 dl

9. One cubic centimeter = one milliliter
Using water displacement,
how many milliliters do
you expect the water
to raise when the cube
is lowered?
This cube’s sides are
each 3 cm. What is
the volume of the cube?
27 cubic cm
27 ml

10. Measuring volume of a solid by water displacement

11. Graduated cylinder measurement
Volume is measured using a graduated cylinder.
When reading a graduated cylinder, read the bottom of the meniscus.

12. Measuring water
If you wanted to measure 25ml of water, what instrument would you use?

13. Measuring water 2
If you wanted to measure 25 grams of water, what 2 instruments could you use?

14. Density of Water One milliliter of water Has a mass of 1 gram
Density = Mass ÷ Volume
Calculate the density of water
1g ÷ 1ml = 1g/ml

15. Scientific notation Rules: 1 digit before the decimal point
Multiply the number by a power of 10
Example: Write 34,000 in scientific notation.
Solution: 3.4 x 104

16. Write the following in scientific notation:
4.1 x 106
4,100,000 = _______________
345,600,000,000 = _________
0.0456= ________________
=____________
O.00305= ____________
3.456 x 1011
4.56 x 10-2
1.2 x 10-7
3.05 x 10-3

17. Write the following in standard form:
4670
4.67 x 103 =__________________
3.112 x 105 = _________________
3.112 x 10-4 = ________________
4 x 10-6 = ___________________
1 x 1011 = __________________
311200
100,000,000,000

18. That’s all folks!
Time to try some on your worksheets!