# Measurement and SI Units Section 1-3 in text. Using Scientific Notation A. Scientists often work with very ___________ or very ________ numbers. 1. Speed.

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Measurement and SI Units Section 1-3 in text

Using Scientific Notation A. Scientists often work with very ___________ or very ________ numbers. 1. Speed of _____________ = 300,000,000 meters per second 1. Speed of _____________ = 300,000,000 meters per second 2. Speed of a ____________ = 0.00086 meters per second 2. Speed of a ____________ = 0.00086 meters per second

Using Scientific Notation B. Scientific Notation 1. A way of expressing a value as the ____________ of a number 1. A way of expressing a value as the ____________ of a number between 1 and 10 and a power of 10. between 1 and 10 and a power of 10. 2. Is a shortcut to writing all of the ______ in a number. 2. Is a shortcut to writing all of the ______ in a number. a. 300,000,000 = _______________ a. 300,000,000 = _______________ the _____________ 8 tells you that the decimal point is really the _____________ 8 tells you that the decimal point is really 8 places to the ____________ of the 3. 8 places to the ____________ of the 3. b. 0.00086 = _______________ b. 0.00086 = _______________ 1) The ____________ exponent means the number is a 1) The ____________ exponent means the number is a ___________. ___________. 2) The exponent of a 4 tells you how many ____________ places 2) The exponent of a 4 tells you how many ____________ places there are to the __________ of the 8.6. there are to the __________ of the 8.6. 3. Makes very large or very small numbers ____________ to work with. 3. Makes very large or very small numbers ____________ to work with.

Using Scientific Notation C. Multiplying in Scientific Notation 1. Multiply the numbers that appear 1. Multiply the numbers that appear __________ the multiplication sign. __________ the multiplication sign. 2. _________ the exponents. 2. _________ the exponents. 3. Make sure answer is in ____________ form. 3. Make sure answer is in ____________ form. D. Example of multiplying 1. How far does light travel in 500 seconds? 1. How far does light travel in 500 seconds? (Speed of light)(time) = distance (Speed of light)(time) = distance

Using Scientific Notation **Remember number before the power of ten must be _____________ than 1 and _________ than 10. 1 and _________ than 10. **If you need to move the decimal to the Left_______ an exponent, or to the Right ______________ an exponent (LARS) Right ______________ an exponent (LARS)

Using Scientific Notation E. When Dividing in Scientific Notation 1. Divide the numbers that appear __________ the 1. Divide the numbers that appear __________ the exponents exponents 2. _______________ the exponents. 2. _______________ the exponents. F. Example of Dividing How long will it take for light from the sun to reach the How long will it take for light from the sun to reach the Earth? Earth? Distance/velocity = time Distance/velocity = time Answer= Answer=

SI Units of Measurement A. For a measurement to make sense, it requires both a ___________ and a ___________. 1. Always use measurements in numbers and units 1. Always use measurements in numbers and units so that their ________________ is clear. so that their ________________ is clear. 2. Scientists use a set of measuring units called 2. Scientists use a set of measuring units called ______, or the International System of Units. ______, or the International System of Units. 3. By using one system of units, scientists can readily 3. By using one system of units, scientists can readily ____________ one another’s measurements. ____________ one another’s measurements.

SI Units of Measurement B. Base units and derived units 1. Base Units- the 7 metric units on which 1. Base Units- the 7 metric units on which the ____ _______ is based. the ____ _______ is based. 2. Derived Units- are the additional units that 2. Derived Units- are the additional units that come from___________ of the __________ come from___________ of the __________ units. units. 3. Derived units include _________ (length x 3. Derived units include _________ (length x width x height) and ________________ width x height) and ________________ (mass/volume). (mass/volume).

SI Units of Measurement C. Metric Prefixes C. Metric Prefixes 1. Indicates how many times a unit should be ______________or 1. Indicates how many times a unit should be ______________or _______________ by ten. _______________ by ten. 2. 9ms = 9/1000 s = 0.009 seconds 2. 9ms = 9/1000 s = 0.009 seconds 3. 12 km = 12 x 1000 m = 12,000 m 3. 12 km = 12 x 1000 m = 12,000 m 4. Are used in non-metric units as well 4. Are used in non-metric units as well a. _____________ = 1,000,000,000 bytes a. _____________ = 1,000,000,000 bytes b. _____________ = 1,000,000 pixels b. _____________ = 1,000,000 pixels 5. _____________ __- a ratio of equivalent measurements that 5. _____________ __- a ratio of equivalent measurements that is used to ___________ a quantity expressed in one unit to another is used to ___________ a quantity expressed in one unit to another unit. unit. convert from 8848 m to km **notice that the meter units cancel **notice that the meter units cancel

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