2 Measurement Metric units The fundamental units :length is the meter (m)Mass is the gram (g)Volume is the liter (l)Temperature is degree Kelvin (°K)but Celsius (°C) is more commonly used
3 Measurement Metric units The metric system is based on the number 10 and therefore a decimal systemPrefixes precede the root or main word (gram, liter, meter).The following prefixes are commonly used in science:
4 Measurement Metric units Examples:A millimeter is about how thick as a toenail.A centimeter is about as thick as a dime.A kilometer is a little more than half of a mile.
5 Measurement Conversions The base represents gram, liter and meter.● ● ●------● ● ● ● ● ● ● ● ● ● *---Prefix: Mega Kilo Hecto Deca Basic Unit Deci Centi Milli MicroAbbrev: M k h dc m, l, g d c m mc or μ
6 Measurement Conversions Moving to the RIGHT increaseMoving to the LEFT decrease
7 Measurement Conversions Hint – we are referring to the exponent associated with 10 when we “count” places to move the decimalWe are NOT counting actual words listed on the chart
8 For exampleif you have 80 hl and you want to convert to cl then you must move 4 spaces to the right.So you move your decimal point 4 spaces to the right.Your answer is cl
9 For exampleif you have 5mg and you want to convert to g then you must move 3 spaces to the left.So you move your decimal point 3 spaces to the left.Your answer is 0.005g
10 Measurement Length The basic metric unit of length is the meter (m). DIFFERENCES BETWEEN:English unitsMetric units
12 Volume When a figure has three dimensions (length, width, and height) we can find its volume.In the metric system volume can be expressed in terms of liters or cubic centimeters(cm3 or cc)
13 Volume The meniscus is the curved interface between the water and air. This is due to the surface tension and adhesive forces of water as it interacts with its container.A: The bottom of a concave meniscus. B: The top of a convex meniscus.
14 Volume In a laboratory you would work with pipettes: pipette pump or filling device is used to draw and dispense fluids
15 Volume In a laboratory you would work with Graduated cylinders Erlenmeyer flasksBeakers
16 MassMass is a measurement of the amount of matter in an object. It is determined by the molecular structure of the object.Not to be confused with…………..
17 MassWeight is a measure of the gravitational pull on an object. It is not the same as mass.
18 Mass In a laboratory you would work with Triple beam balance / Electronic scale
19 Scientific NotationScientific notation uses powers of 10 so very large or small numbers can be expressed concisely.
20 Scientific NotationThe number we use as the base for this system is 10. The exponent is the power of the number and is applied to the base.
21 For exampleWrite the following large number using Scientific Notation : 146,000,000,000.Step 1 :place the decimal after the first digit and drop all the zeros.,000,000_Step 2: count the number of places from the decimal to the end of the number. There are 11 places after the decimal point; therefore the exponent is 11.1.46 X 1011
22 For exampleStep 1: with small numbers you count from the decimal the number of zeroes until you reach the first non-zero number= 1.23 X10-6
23 Graphing DataLine graphs have both X axis and Y axis. Each X and Y axis is subdivided into uniform intervals.