1. Measurements
in Science

3. Experimental measurements must not only be RELIABLE and ACCURATE but also must be easily understood by others

4. a decimal system of measurement based on 10
metric system:
(SI)
Units of SI used in this class:
Kilo= 1000
deci= 1/10 or .1
centi= 1/100 or .01
milli= 1/1000 or .001

5. When Measuring… Use…
length meters (m)
volume l x w x h (m3)
liter (L)
mass grams (g)
temperature Celsius (°C)
*Mass is a measure of amount of matter in an object.
*Weight is measure of gravitational force

6. 1 meter=100 centimeters (cm) 1 meter= 1000 millimeters (mm) 1 cm= 10mm

7. length of the Mississippi River kilometer
centimeter kilometer milligram
millimeter gram kilogram
Celcius meter liter milliliter
length of the Mississippi River
kilometer

8. mass of a paper clip milligram centimeter kilometer milligram
millimeter gram kilogram
Celcius meter liter milliliter
mass of a paper clip
milligram

9. mass of an elephant kilogram centimeter kilometer milligram
millimeter gram kilogram
Celcius meter liter milliliter
mass of an elephant
kilogram

10. width of a fingernail millimeter centimeter kilometer milligram
millimeter gram kilogram
Celcius meter liter milliliter
width of a fingernail
millimeter

11. width of a TV screen centimeter centimeter kilometer milligram
millimeter gram kilogram
Celcius meter liter milliliter
width of a TV screen
centimeter

12. volume of juice in a paper cup
centimeter kilometer milligram
millimeter gram kilogram
Celcius meter liter milliliter
volume of juice in a paper cup
milliliter

13. mass of a bowl of cereal grams centimeter kilometer milligram
millimeter gram kilogram
Celcius meter liter milliliter
mass of a bowl of cereal
grams

14. amount of salt in an order of french fries
centimeter kilometer milligram
millimeter gram kilogram
Celcius meter liter milliliter
amount of salt in an order of french fries
milligram

15. amount of soda in a large plastic bottle
centimeter kilometer milligram
millimeter gram kilogram
Celcius meter liter milliliter
amount of soda in a large plastic bottle
liter

16. temperature of a bowl of soup
centimeter kilometer milligram
millimeter gram kilogram
Celcius meter liter milliliter
temperature of a bowl of soup
Celsius

17. Density
is the mass of an object per unit volume (D=m/v). The unit for density is a combination of more than one fundamental unit and is therefore called a derived unit

18. The density of water is 1.0 g/mL
If an object’s density is greater than 1.0 g/mL will it sink or float?
SINK!

19. Do two candy bars have the same density?
Problem:
Do two candy bars have the same density?

20. Will a Diet Pepsi float or sink? Regular Pepsi?
What do you base your answer on?
What did you see?
Were you correct in your predictions?
Why or why not?