Presentation on theme: "Metric System Measuring Data Learning Objectives"— Presentation transcript:
1 Metric System Measuring Data Learning Objectives 1. Identify correct SI units of measurement for length, mass, volume, temperature and area2. Use metric units to measure various data
2 Let’s take some measurements! Intro—ask students crazy conversionsHow many feet in a mile?How many ounces in a quart?How many lbs in a ton?
3 Metric systemScientists use a common measurement system so they can compare their results.Single standard system of measurement is called the metric system or International System of Units (SI for short)Only countries that do not use metric system:United StatesBurma (Myanmar)LiberiaBased on factors of 10
5 Base Units Mass - the amount of matter that makes up an object Unit of Measurement: grams (g)Volume- the amount space occupied by a solid, liquid, or gasUnit of Measurement: liter (L)Length - the measurement of something from end to endUnit of Measurement: meter (m)
6 Mass Volume Length grams (g) liters (L) meters (m) 1 ton dump truck = 1000 kg = 2000 lbsgrams (g)1 marble = 3 gVolume1 can of soda =355 mLliters (L)Weight of a marble in g ?MD—pour out 100 mL in graduated cylinderShoe size = length of football field = 105 m; roughly 400 shoes longShoe size of 9 (women) =9.85 in = 25.1 cmLengthShoe size of 9 (men) =in = 26 cmmeters (m)
7 Base unit: meters, grams, or Liters Kate Hudson doesn’t understand doing college math.
8 Mass Mass - the amount of matter that makes up an object Unit of Measurement: gramTools: triple beam balance or scaleMass is not the same as weight.Weight- the gravitational pull of an objectEx. Gravitational pull on the moon is less, so we weigh less on the moon (6 times less)Person who weighs 100 lbs on Earth = 16 lbs on Moon
9 Volume Volume- the amount of space occupied by a solid, liquid, or gas Unit of Measurement: liter (L)Volume of liquid is measuredusing a graduate cylinder or abeaker that is marked with a scalein milliliters (mL)
10 VolumeFor objects with regular shape like a cube or rectangular prism, we can use a formula to calculate its volume.Volume of a cube = side x side x sideVolume of rect. Prism = length x width x heightFor irregular shaped objects like a rock, the water displacement method is used.Beaker or graduated cylinder is filled with water to specific level, object is placed in beaker.Change in water level = volume of object.
11 Reading a Graduated Cylinder 11.5 mLmeniscusWhat is the volume of the liquid in the graduated cylinder?
12 Length Length- the measurement of something from end to end Under SI system, the base unit for length is meter (m)Tools: ruler or meter stick, or measuring taperadiuswidthlengthdiameter
13 AreaArea- the inside shape or space of a an object measured in square unitsIn rectangles and in squares, a simplecalculation of length times width will givethe number of square units2 x 2 = 4 m²4 x 4 = 16 m²
14 TemperatureTemperature – a measure of how warm or cold an object is with respect to some standard ● Fahrenheit (US) after G.D. Fahrenheit 32°F = freezing 212°F = boiling ● Celsius (rest of world) after A. Celsius 0°C = freezing 100°C = boiling
15 How do you convert? To Convert to Celsius To Convert to Fahrenheit Tº C = Tº F – 32 Tº F = 1.8 (Tº C) + 321.8