2.
Measurement Standard An exact quantity that people agree to use for comparison. * helps you get the same answer as other people
3.
What was used as the earliest measurement standards? Body Parts * The question then, is WHO’S body parts? The KING’S or QUEEN’S
4.
Is your hand or a body part a good standard of measurement? * no * people’s hands are not the same size * get different answers
5.
In order for any measurement to MAKE SENSE; two things must be included. 1.) a number 2.) a unit
6.
Every type of measurement has a base or central unit. * meter (distance or length) * liter (volume) * gram (mass) * second (time)
7.
Adding a prefix to a base (central) unit, you can create a whole new unit to measure any object.
8.
Prefixes Used When Measuring: Large Objects kilo = 103 hecto = 102 deka = 101 Small Objects deci = 10-1 centi = 10-2 milli = 10-3
9.
Measurements that can be made Length Mass Temperature Time Area Volume Density Weight
10.
Length The distance between two points. Base (central) units of length * (US) FOOT [ft] * (SI) METER [m]
11.
Length Length of an object or the distance between two points is measured using a METERSTICK.
12.
Mass “A body of coherent matter.” * a collection of stuff joined to form an object Base (central) units of mass * (US) SLUG [slug] * (SI) KILOGRAM [kg] sometimes gram [g]
14.
Temperature Measurement of how hot or cold something is.
15.
Temperature Base (central) units of temperature * (US) FAHRENHEIT [oF] * (SI) CELCIUS [oC] > (SI) KELVIN [K] * this is an absolute scale
16.
Temperature Temperature is measured using a THERMOMETER.
17.
Absolute Zero The coldest possible temperature. * temperature where ALL motion stops * 0 Kelvin * found by the formula: K = oC + 273.16
18.
Time Interval between two events. Base (central) units of time * (US) SECOND [s] * (SI) SECOND [s]
19.
Time Time can be measured using a CLOCK or a CALENDAR.
20.
Derived Units Obtained by combining multiple units of measurement.
21.
Area The amount of surface included in a set of boundaries. Found by the formula: * Area = lengthx width
22.
Area What is the difference between length and width? DIRECTION
23.
Area Base units of area * (US) FEET SQUARED [ft2] * (SI) METERS SQUARED[m2]
24.
Volume The amount of space an object occupies. Easy with liquids & gases, harder with solids * for a solid you may need the formula: volume = l x w x h
25.
Volume For a liquid or a gas all you need is a devise that is designed to measure volume. * a beaker, a flask or a graduated cylinder
26.
Volume Base (central) units of volume * (US) GALLON [gal] * (SI) LITER [L] sometimes centimeters cubed [cm3]
28.
Density The measurement of how thick, compact and solid an object is. Relationship between the mass & volume of an object
29.
Density Found by the formula: * Density = mass ÷ volume Expressed in g/Lorg/cm3 * a mass unit / a volume unit
30.
Weight Measurement of the force of gravity pulling on the mass of an object. Changes as gravity changes. Base units of weight * (US) POUND [lb] * (SI) NEWTON [N]
31.
Weight Weight is measured using a SPRING SCALE.
33.
Physical Properties Characteristics of a substance that can be used to identify it. Color Shape Texture State of matter Size All measurements (changing a physical property does NOT change the substance)
Be the first to comment