6 th please be in your seat ready to go when the bell rings we will start the quiz after a short...
TRANSCRIPT
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6th
Please be in your seat ready to go when the bell rings
We will start the quiz after a short review
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Chapter 1The Nature of
Science
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Chapter 1 Vocabulary
ScienceTechnologyScientific theory
VariableMass
Volume WeightScientific Notation
PrecisionAccuracy
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What is the purpose of science?
•To investigate questions
•To support or refute a
theory
•To gain knowledge
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Science is a system of knowledge based on facts or
principles
Technology is the application of science to meet human
needs
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Theories & Laws
Theory A tested, possible explanation of a natural event.
Law a summary of an observed natural event
(a repeated observation about nature)
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*A theory must pass 3 tests:
1.A theory must explain observations simply & clearly
2. A theory must be repeatable
3. Scientists must be able to predict from a theory
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Qualitative vs. Quantitative
QualitativeQualitative
Describes data using words
Quality
Ex. There are many red cars in the parking lot
QuantitativeQuantitative
Describes data with numbers
Quantity
Ex. There are 14 cars in the parking lot
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What is it used for?Who can use it?
What is it used for?Who can use it? State the Question
Form A HypothesisTest the HypothesisObserve/Collect DataDraw a Conclusion
The Scientific Method
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Experiments
How many variables are in a typical experiment?
How many variables can be tested at one time?
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The main parts of an experiment
Independent Variable
Dependent Variable (result)
Control
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Determine the variables in the experiment
A botanist is studying the affect of fertilizer on pea plants.
She test 5 plants. She adds 6 oz of fertilizer to plant 1, 7 oz of fertilizer to plant 2, 8 oz to plant 3, 9 oz to plant 4 and no fertilizer to plant 5. She waters each of the plants with 200mL of water everyday for 2 weeks and places them in the sun for 3 hours each day.
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The Metric System
The International System of Measurement (SI units)
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Metric Conversions
K H D B D C M
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Practice Problems
550 mm = ________m
1.6 kg = ________g
2800mmol =________mol
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Organizing Data
There are 3 main types of graphs:Bar
Line
Pie
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Scientific Notation
A value written as a simple number multiplied by a power of 10.
Shortcut: If you move the decimal right the exponent is negative If you move it to the left the exponent is
positive
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Practice
800 000 000 m
0.0015 kg
60 200 L
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Using Scientific Notation
When you multiply, you add the exponents
When you divide, you subtract the exponents
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Significant Digits (Figures)
The digits in a measurement that are known for certainty.
1.63816381.6