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DO NOW Without using your book what are the three branches of Natural Science? Earth and Space, Life, Physical

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Physical Science Space and Time Matter and Change Forces and Motion Energy

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Scientific Method An organized plan for gathering, organizing, and communicating information Step 1: Ask a question. Step 2: Make an observation Step 3: Form a Hypothesis

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Scientific Method Step 4: Test your hypothesis (Experiment) Step 5: Analyze Results Step 6: Draw Conclusions Step 7: Communicate results and develop a Theory

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Theory versus Law Scientific Theory: a well-tested explanation for a set of observations or experimental results. This is created when a hypothesis has been supported in repeated experiments Scientific Law: describes an observed pattern in nature without attempting to explain it.

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Scientific Models Make it easier to understand things that might be too difficult to observe directly.

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A way of expressing a number between 1 and 10 and a power of 10. Can be used for very large or very small numbers. 400,000,000 can be expressed 4.0 x 10 8 0.000000007 can be expressed 7.0 x 10 -9 Scientific Notation

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50,000,000= 5.0 x 10 7 900,000= 9.0 x 10 5 0.00000003= 3.0 x 10 -8 0.002= 2.0 x 10 -3 23,000,000,000=2.3 x 10 10 450,000= 4.5 x 10 5 Write the Scientific Notation for the following numbers

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When you are asked to multiply two numbers in scientific notations, multiple the numbers in front and then add the notations. (3.0 x 10 9 ) x (5.0 x 10 3 ) = 15.0 x 10 12 =1.5 x 10 13 Multiplying

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When you are asked to divide two numbers in scientific notations, divide the numbers in front and then subtract the notations. (9.0 x 10 9 ) / (3.0 x 10 3 ) = 3.0 x 10 6 Dividing

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SI – International System of units Length – straight-line distance between 2 points meter Mass – the quantity of matter in an object Kilogram SI Units for Measurement

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Volume- amount of space taken up by an object. Cubic meters m 3 Density – ratio of an objects mass to its volume. Kilograms per cubic meter kg/m 3 SI Units

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Time- Seconds s Temperature- kelvin K Amount of substance- mole mol Electric Current- ampere A SI Units

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Giga- Mega- Kilo- Deci- Centi- Milli- Micro- Nano- SI Prefixes

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Precision- gauge of how exact a measurement is. The more significant figures in a number the more precise the number. The precision of a calculation is limited to the least precise number in the calculation. 7.0856256367 x 4.56734 = Limits of Measurement

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DO NOW Take out your homework Write the following in scientific notation 4350000000000000 0.0000007

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Accuracy- the closeness of a measurement to the actual value of what is being measured. Limits of Measurement

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Measuring Temperature Thermometers: Bulb thermometers consist of a sealed, narrow glass tube, called a capillary tube. As the temperature changes, the volume of the liquid changes. K= o C + 273 F= 9/5 o C + 32.0 o

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Organizing Data Use data tables and graphs. Make it easier to visualize the patterns and changes.

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Line Graph shows changes that occur in related variables (often time). Slope = Rise/Run Direct proportion- ratio of the variables is constant. Inverse proportion- relationship where the product of the two variables is constant.

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Bar Graph Used to compare a set of measurements, amounts, or change.

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Circle Graph Sometimes called Pie Chart Parts related to a whole

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Communicating Data Scientific Journals Conferences

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