Table of Contents / Title: Measurements / Page #: 12 / Date: 9/12/12 / Title: Measurements / Page #: 12 / Date: 9/12/12

Objective / Students will be able to define density, time and temperature. / Students will be able to convert degrees Celsius to degrees Kelvin. / Students will be able to use scientific notation to express large and small numbers. / Students will be able to define density, time and temperature. / Students will be able to convert degrees Celsius to degrees Kelvin. / Students will be able to use scientific notation to express large and small numbers.

Measurement Density: The amount of matter that occupies a given space. Density = Mass / Volume.  How packed in something is.  Measured in “grams per cubic centimeter” (g/cm ), “grams per milliliter” (g/mL) and “kilograms per cubic meter” (Kg/m ). Time: The interval between two events.  Measured in seconds and minutes, etc. Density: The amount of matter that occupies a given space. Density = Mass / Volume.  How packed in something is.  Measured in “grams per cubic centimeter” (g/cm ), “grams per milliliter” (g/mL) and “kilograms per cubic meter” (Kg/m ). Time: The interval between two events.  Measured in seconds and minutes, etc. 3 3

Measurement Temperature: We call it heat, but its actually a measure of movement.  A mass made up of particles that are moving quickly has a high temperature.  A mass made up of particles that are moving slowly has a low temperature.  Scientists use degrees Celsius (°C) - Water boils at 100ºC and freezes at 0ºC.  Scientists also use degrees Kelvin (ºK) - Based on Absolute Zero - the temperature at which all particles stop moving: 0ºK = -273ºC.  ****To convert ºC to ºK, add 273 to ºC****  Example: 37ºC = ? ºK?  37ºC = 310ºK Temperature: We call it heat, but its actually a measure of movement.  A mass made up of particles that are moving quickly has a high temperature.  A mass made up of particles that are moving slowly has a low temperature.  Scientists use degrees Celsius (°C) - Water boils at 100ºC and freezes at 0ºC.  Scientists also use degrees Kelvin (ºK) - Based on Absolute Zero - the temperature at which all particles stop moving: 0ºK = -273ºC.  ****To convert ºC to ºK, add 273 to ºC****  Example: 37ºC = ? ºK?  37ºC = 310ºK

Measurement Scientific Notation - A way to express very big and vary small numbers using the number 10 and an exponent.  Expressed as: Single # X 10  The exponent represents the number of places that the decimal point of the large number must move so that only a single # remains to the left of the decimal.  If a decimal must be shifted left, then the exponent is positive.  If a decimal must be shifted right, then the exponent is negative. Scientific Notation - A way to express very big and vary small numbers using the number 10 and an exponent.  Expressed as: Single # X 10  The exponent represents the number of places that the decimal point of the large number must move so that only a single # remains to the left of the decimal.  If a decimal must be shifted left, then the exponent is positive.  If a decimal must be shifted right, then the exponent is negative. exponent

Measurement Scientific Notation -  Ex. 1) 40, = 4.0 X 10  = 4.0  Ex. 2) = 4.0 X 10  = 4.0  Ex 3) 59,742.0 = X 10 Scientific Notation -  Ex. 1) 40, = 4.0 X 10  = 4.0  Ex. 2) = 4.0 X 10  = 4.0  Ex 3) 59,742.0 = X is a positive exponent is a negative exponent 4