Base units

• Mass – gram

• Temperature- ° Celsius

• Time –seconds, minutes

• Length – meter

• Area – meters2

• Volume – meters3, liter

Warm up/practice

• 78 g = __________ mg

• 25 g = __________kg

• 578cm = _________m

• 456 m = __________km

• 500 mL = ________L

• What characteristics do most scientists share?

• Why is measurement important in science?

Warm up

• What is “scientific inquiry?”

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Myth busters

• {They provide an example of doing science.}

• They choose a myth

• Background information

• Hypothesis

• Design test, observe, collect data share

Warm up

• When do you use scientific inquiry in your life? (Outside of science class)

experiment

• Orange – 27°C, vita water

• Purple - 17°C, cranrasberry

• Water - 22°C, water

• Hypothesis – cranrasberry will have the most “food” for the yeast – yeast disappears, most inflated balloon

design

• Does temperature affect yeast behavior?

• Hot – 85°C

• Warm - 27°C

• Cold – 16 °

• 150 mL water

• 10 mL sugar

• 15 mL yeast

Design HR 227

• Hypothesis is warm with lots of sugar will show the most yeast growth.

• 65°C, 150 mL water, 9 mL of yeast, 1 spoon of sugar

• 65°C, 150 mL water, 9 mL of yeast, 2 spoons of sugar

• 65°C, 150 mL water, 9 mL of yeast, 4 spoons of sugar

Hr 228 - Design

• Which sweetener will yeast grow best in?

• 150 mL water, 10 mL yeast, nothing

• 150 mL water, 10 mL yeast, sugar

• 150 mL water, 10 mL yeast, sweet’n low

• All at 30°C

Design HR229

• Hypothesis - Krazy Kiwi will rise the most

• 150 mL krazy Kiwi, 5mL yeast

• 150 mL water, heaping spoon of sugar, 5mL yeast

• 150 mL water, 5mL yeast

• Unknown temperatures

Design

• Testing hypothesis – yeast grows best with greatest amount of sugar

• Control – 1)all the things held constant 2)compare against

• Variable – thing you are testing

• CONTROLS: amt. of liquid, amt., of yeast,

• VARIABLE: TYPE OF SWEETNESS

• Scientific Inquiry/Scientific Method/

• Problem Solving

• Identify a problem – What are the best conditions for yeast growth?

• Gather data

• State a hypothesis

• Test the hypothesis

• Draw conclusions

• Report results

Warm up?

• What scientific and technological advances have occurred since you were born?

Sunscreen experiment

• What were the controls?

• What was the variable?

• Why did we have one sample without sunscreen?

Possible graph

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20

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60

80

100

120

0 15 30 45

SPF 0

SPF 15

SPF 30

Possible bar graph

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10

20

30

40

50

60

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90

1st Qtr 2nd Qtr 3rd Qtr 4th Qtr

East

West

North

Mass

• Grams, kg

• Measure the amount of matter an object has

• Different from weight which is attraction of the gravity on an object

volume

• Liters, mL or cm3

• The amount of space an object occupies

• 1 L of water

• 5 mL of medicine

• Observation – info that can be gathered and confirmed with the senses.– Example – the coke can is red

Inference – a deduction based on observation.

Example: the person drinking diet coke must be on a diet.

Hypothesis – tentative explanation of an observation that will be tested; an educated guess

• Theory – explanation of events/behaviors based on “repeated” testing; withstands the test of time.

Law?

Why do scientists need evidence?

• To prove their theory

• To not lead people astray

• So others don’t do dangerous things

• To come up with new theories

• So others can build on your work

• To fund new projects

test

• Scientific method (3)

• Multiple choice (15)

• Measure line (5)

• Rank distances (5)

• Calculate the volume (1)

• Open response (choose 1)

How many drops of water fit on the “head” of a penny”?

• Background info –

• Hypothesis?

• Data?

practice

• Find the length, width, area, & perimeter of note card in cm & mm

Sample

• Design an experiment to find out what color surface heats up fastest in the Sun.