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Base units. Mass – gram Temperature- ° Celsius Time –seconds, minutes Length – meter Area – meters 2 Volume – meters 3 , liter. Warm up/practice. 78 g = __________ mg 25 g = __________kg 578cm = _________m 456 m = __________km 500 mL = ________L.

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base units
Base units
  • Mass – gram
  • Temperature- ° Celsius
  • Time –seconds, minutes
  • Length – meter
  • Area – meters2
  • Volume – meters3, liter
warm up practice
Warm up/practice
  • 78 g = __________ mg
  • 25 g = __________kg
  • 578cm = _________m
  • 456 m = __________km
  • 500 mL = ________L
slide3
What characteristics do most scientists share?
  • Why is measurement important in science?
warm up
Warm up
  • What is “scientific inquiry?”
myth busters
Myth busters
  • {They provide an example of doing science.}
  • They choose a myth
  • Background information
  • Hypothesis
  • Design test, observe, collect data share
warm up1
Warm up
  • When do you use scientific inquiry in your life? (Outside of science class)
experiment
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
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
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
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
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
design1
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
slide13
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 up2
Warm up?
  • What scientific and technological advances have occurred since you were born?
sunscreen experiment
Sunscreen experiment
  • What were the controls?
  • What was the variable?
  • Why did we have one sample without sunscreen?
slide18
Mass
  • Grams, kg
  • Measure the amount of matter an object has
  • Different from weight which is attraction of the gravity on an object
volume
volume
  • Liters, mL or cm3
  • The amount of space an object occupies
  • 1 L of water
  • 5 mL of medicine
slide20
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

slide21
Theory – explanation of events/behaviors based on “repeated” testing; withstands the test of time.

Law?

why do scientists need evidence
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
slide23
test
  • Scientific method (3)
  • Multiple choice (15)
  • Measure line (5)
  • Rank distances (5)
  • Calculate the volume (1)
  • Open response (choose 1)
practice
practice
  • Find the length, width, area, & perimeter of note card in cm & mm
sample
Sample
  • Design an experiment to find out what color surface heats up fastest in the Sun.