4 How Big? A meter is about 39 inches A kilometer is 0.6 mile A centimeter is about the width of your little fingerA gram is about the mass of a paper clipA kilogram is 2.2 poundsYou drink 2 liters of pop
5 Other metric unitsTemperature is measured in degrees celsius or centigradeHeat/energy is measured in calories or joulesWeight is measured in NewtonsMega = 1,ooo,oooMicro = one millionthNano = one billionth
6 K H D O D C MChanging from one metric unit to another is called metric conversion“O” is the space where meter, liter, or gram (the “base unit”) belongsKids Have Dropped Over Dead Converting MetricsLet’s practice!
7 K H D O D C MTo change from one metric unit to another, we simply move the decimal point.For example:25.4 km = _____________ cm?K-H-D-O-D-C is 5 places to the right25.4 km = 2,540,000 cm
8 K H D O D C M 30 cm = ___________hm C – D- O –D- H is 4 places to the left30 cm = hm(this is the same as hm)14 dkl = _____dlD- O –D is 2 places to the right14 dal = 1400 dl
9 One cubic centimeter = one milliliter Using water displacement,how many milliliters doyou expect the waterto raise when the cubeis lowered?This cube’s sides areeach 3 cm. What isthe volume of the cube?27 cubic cm27 ml
10 Measuring volume of a solid by water displacement
11 Graduated cylinder measurement Volume is measured using a graduated cylinder.When reading a graduated cylinder, read the bottom of the meniscus.
12 Measuring waterIf you wanted to measure 25ml of water, what instrument would you use?
13 Measuring water 2If you wanted to measure 25 grams of water, what 2 instruments could you use?
14 Density of Water One milliliter of water Has a mass of 1 gram Density = Mass ÷ VolumeCalculate the density of water1g ÷ 1ml = 1g/ml
15 Scientific notation Rules: 1 digit before the decimal point Multiply the number by a power of 10Example: Write 34,000 in scientific notation.Solution: 3.4 x 104
16 Write the following in scientific notation: 4.1 x 1064,100,000 = _______________345,600,000,000 = _________0.0456= ________________=____________O.00305= ____________3.456 x 10114.56 x 10-21.2 x 10-73.05 x 10-3
17 Write the following in standard form: 46704.67 x 103 =__________________3.112 x 105 = _________________3.112 x 10-4 = ________________4 x 10-6 = ___________________1 x 1011 = __________________311200100,000,000,000
18 That’s all folks!Time to try some on your worksheets!