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The Nature of Science

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The Nature of Science

I. The Methods of Science

-a _________ is a ______ used to help you

________ something, often something in a

________ _____

mnemonic

device

remember

particular

order

My

Very

Energetic

Mother

Just

Served

Us

Nine

Pizzas

Mercury

Venus

Earth

Mars

Jupiter

Saturn

Uranus

Neptune

Pluto

Kids

Play

Chess

On

Fat

Green

Stools

Kingdom

Phylum

Class

Order

Family

Genus

Species

The Nature of Science

I. The Methods of Science

My

Cat

Died

Drinking

Hot

Kool-Aid

meter

milli-

centi-

deci-

liter

deka-

hecta-

kilo-

gram

meter

pico-

nano-

milli-

centi-

deci-

liter

deka-

hecta-

kilo-

Mega-

Giga-

gram

1 x 10-12

1 x 10-9

0.001

0.01

0.1

10

100

1000

1 x 106

1 x 109

The Nature of Science

3

2

What fraction would you multiply by to get 1?

I. The Methods of Science

-unit cancellation

Multiply the Fractions:

1

1

4

3

7

3

28

4

1

1

4

1

1

x

=

x

=

=

1

1

1

1

1

5

8

4

15

1

6

10

1

1

10

1

1

x

=

x

=

=

1

2

3

1

Reciprocal

1

3

2

2

3

1

1

x

=

=

1

1

Reciprocal

The Nature of Science

I. The Methods of Science

-unit cancellation

How many hectoliters in a deciliter?

1 dL

1 L

1 hL

x

x

=

0.001 hL

1

10 dL

100 L

How many microliters in a dekaliter?

1 dkL

10 L

1 x 106μL

x

x

=

1 x 107μL

1

1 dkL

1 L

The Nature of Science

I. The Methods of Science

-unit cancellation

How many megameters in 100 centimeters?

100 cm

1 m

1 Mm

x

x

=

1 x 10-6Mm

1

100 cm

1 x 106m

How many picograms in 1000 kilograms?

1000 kg

1000 g

1 x 1012 pg

x

x

=

1 x 1018pg

1

1 kg

1 g

The Nature of Science

I. The Methods of Science

-unit cancellation

How many milliliters in 10 microliters?

10 μm

1 m

1000 mm

x

x

=

1 x 10-2 or 0.01 mm

1

1 x 106μm

1 m

How many nanometers in 0.0001 Gigameters?

1 x 10-4 Gm

1 x 109 m

1 x 109 nm

x

x

=

1 x 1014nm

1

1 Gm

1 m

The Nature of Science

II. Standards of Measurement

-the ___________ ______ of _____, or __, is founded on _____ ____ _____,

which ______ be ______ _____, and are

___ _______ from _____ _____

International

System

units

SI

seven

base

units

cannot

broken

down

not

derived

other

units

SI base units

http://physics.nist.gov/cuu/Units/units.html

The Nature of Science

II. Standards of Measurement

-other __ _____ are _______ _____,

which are ________ by _________

_______ __ _____, and can be _______

_____ into __ ____ _____

SI

units

derived

units

obtained

combining

different

SI

units

broken

down

SI

base

units

square meter

m2

Area

m2

cubic meter

m3

Volume

m3

m/s

meter per second

m/s

Velocity

N

kg·m/s2

Newton

Force, Weight

P

N/m2

N/m2

Pascal

Pressure

Joule

J

Energy, Work

N·m

kg·m2/s2

Watt

W

Power

J/s

kg·m2/s3

The Nature of Science

II. Standards of Measurement

-_______ _____ might be ____________

of _____ ____ ___ ____ ____, or a

__________ of ____ ____ _____ and

other _______ _____

derived

units

combinations

more

than

one

base

unit

combination

both

base

units

derived

units

http://physics.nist.gov/cuu/Units/SIdiagram.html

The Nature of Science

II. Standards of Measurement

Directions: For each of the derived units in the column on the left below,

list the letters of all the base units used in combination to

make the derived unit:

1. Newton ____ ____ ____

a. kilogram

2. Watt ____ ____ ____

b. meter

3. Hertz ____

c. second

4. Coulomb ____ ____

d. mole

5. Gray ____ ____

e. ampere

6. Volt ____ ____ ____ ____

f. Kelvin

7. Tesla ____ ____ ____

g. candela

8. Ohm ____ ____ ____ ____