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Metric System. Measurement and SI. Bell Work 8/16/10. Please get our your signed syllabus sheet Please get a peach bell work sheet and begin answering the following questions in complete sentences What instrument is used to measure length?

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metric system

Metric System

Measurement and SI

bell work 8 16 10
Bell Work 8/16/10

Please get our your signed syllabus sheet

Please get a peach bell work sheet and begin answering the following questions in complete sentences

  • What instrument is used to measure length?
  • Why do you think it is important to know how to measure length?
metric system1
Metric System
  • Referred to as the international system of units or SI
  • Based on the number 10
  • Measuring system used by all scientists
  • Used to measure length, volume, mass, weight, density, and temperature
length
Length
  • Used to measure from one point to another
  • Instrument used to measure length is the metric ruler
  • Basic unit of length is the meter
    • kilometer- km
    • hectometer- hm
    • decameter- dam
    • meter-m
    • decimeter- dm
    • centimeter- cm
    • millimeter – mm
  • In space, distance is measured in light years
    • A light year is the distance light travels in a year
bell work 8 17 10
Bell Work 8/17/10
  • What is the metric system used to measure?
  • What is the metric system referred to as?
  • What is the basic unit for length?
  • In space, what is distance measured in?
homework 8 17 10
Homework 8/17/10

Practice measuring the following items at your house. Remember to use centimeters as your unit.

  • The width of your front door
  • The height of a glass or cup
  • One item of your choice
    • For each write down the item and the measurement for the item
bell work 8 18 10
Bell Work 8/18/10

Using a ruler and centimeters (cm) measure the length of the lines on the piece of paper at your table. Please share with your partner and don’t write on the paper.

Example: 6.3 cm

  • Length of line 1:
  • Length of line 2:
  • Length of line 3:
  • Length of line 4:
volume
Volume
  • Volume is the amount of space an object takes up
  • Volume can be measured for liquids and solids.
  • Liquids

Basic unit of liquid volume is the liter (L)

    • kiloliter – kL
    • hectoliter – hL
    • dekaliter – daL
    • liter – L
    • deciliter – dL
    • centiliter – cL
    • millimeter – mL
  • The instrument used to measure liquid volume is the graduated cylinder
  • Meniscus – Measure to this line.
volume cont
Volume (cont.)
  • Solids

Basic unit of solid volume is cubic meters (m^3)

    • cubic kilometer- km^3
    • cubic hectometer- hm^3
    • cubic decameter- dam^3
    • cubic meter-m^3
    • cubic decimeter- dm^3
    • cubic centimeter- cm^3
    • cubic millimeter – mm^3
volume cont1
Volume (cont.)
  • To calculate the volume of a solid
      • length x width x height
      • l x w x h
      • Instrument used to measure solid volume is the metric ruler
  • Solid Volume can also be measured by water displacement using a graduated cylinder
    • Record the volume of water in the cylinder
    • Place the object in the cylinder and record the new volume
    • Measurement 2 – measurement 1 = volume of the object
bell work 8 19 10
Bell Work 8/19/10
  • What is volume?
  • What is the basic unit for liquid volume?
  • What is the basic unit for solid volume?
  • How do you calculate the volume of a solid?
bell work 8 20 10
Bell Work 8/20/10

1. What is the volume of a solid with these measurements?

Length 3 cm width 2 cm height 4 cm

2. How do you find the volume of an irregular solid?

slide13
Mass
  • Mass is the amount of matter in an object.
  • Basic unit of mass is a gram (g)
  • Large objects are measured in kilograms (kg)
  • Small objects are measured in grams (g) or milligrams (mg)
    • kilogram – kg
    • hectogram – hg
    • dekagram – dag
    • gram – g
    • decigram – dg
    • centigram – cg
    • milligram – mg
  • Most often used are the kg, g, and the mg
  • Instrument used to measure mass is the triple beam balance
bell work 8 23 10
Bell Work 8/23/10

Please use complete sentences.

  • What is mass?
  • What instrument is used to measure mass?
bell work 8 24 10
Bell Work 8/24/10

Please use complete sentences.

  • What basic units do we use to measure volume?
  • What basic units do we use to measure length?
  • What basic units do we use to measure mass?
density
Density
  • Shows a relationship between mass and volume
  • To calculate density we divide mass by volume
    • d=m/v
  • Units for density depend on size of object
    • Large objects = kg/L
    • Small objects = g/mL
bell work 8 25 10
Bell Work 8/25/10

Find the density of an object with

1. m=50g

v=5mL

2. m=200kg

v=2L

temperature
Temperature
  • Measured in degrees Celsius
  • Instrument = Theremometer
  • Freezing = 0 degrees Celsius
  • Boiling = 100 degrees Celsius
bell work 8 26 10
Bell Work 8/26/10

Please DO NOT touch the microscopes!!!

  • What instrument is used to measure temperature?
  • What is the freezing point in degrees Celsius?
  • What is the boiling point in degrees Celsius?
bell work 8 27 10
Bell Work 8/27/10

Find the density of the following objects

  • m = 20 g v = 4 mL
  • m = 60 kg v = 2 L
  • m = 8 g v = 8 mL
weight
Weight
  • Weight is the measure of attraction between objects due to gravity.
  • Basic unit of weight is the Newton (N)
bell work 8 30 10
Bell Work 8/30/10

Please get a new pink bell work sheet from the counter by the sinks.

  • What is weight?
  • What unit is weight measured in?
  • How many centimeters are in a meter?
tools for measuring
Tools for Measuring
  • A metric ruler is used to find length
  • A graduated cylinder is used to fine the volume of a liquid or an irregular solid
  • A metric ruler is used to find the volume of a rectangular object
  • A triple beam balance is used to find the mass of an object
bell work 8 31 10
Bell Work 8/31/10
  • 1000 g = ______ kg
  • 200 mL = ______ L
  • 1 m = ______ Dkm
  • 77 g = ______ mg
bell work 8 28 09
Bell Work 8/28/09
  • 25 kg = ______ mg
  • 345 cL = ______ HL
  • 980 m = ______ mm
  • 23700 g = ______ kg
bell work 9 1 10
Bell Work 9/1/10
  • 98 Hg = ______ mg
  • 222 KL = ______ L
  • 2706 mm = ______ Dkm
  • 5 g = ______ kg
bell work 09 09 09
Bell Work 09/09/09

What is the base unit for the following?

  • Length
  • Volume
  • Mass
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