Grade 8 Science Lesson 1 2 System Components Part 2 by qqxVlS

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									 LESSON 1.2 SYSTEM COMPONENTS (PART 2)

  OVER THE YEARS, PEOPLE HAVE WORKED TOGETHER TO
   CREATE COMPLEX COMBINATION OF SYSTEMS CALLED
   INDUSTRIES.
  INDUSTRIES HELP TO PRODUCE GOODS AND SERVICES THAT
   PEOPLE DESIRE IN EVERYDAY LIFE.
  INDUSTRIES ARE COMBINATIONS OF PHYSICAL AND SOCIAL
   SYSTEMS THAT WORK TOGETHER TO PRODUCE A PARTICULAR
   CLASS OF GOOD AND SERVICES.
  THE FOLLOWING TABLE BELOW SHOWS SOME DIFFERENT
   TYPES OF INDUSTRIES AND THEIR RELATED PARTS.

   TABLE 1- SAMPLE INDUSTRIES AND SOME RELATED SYSTEMS

   INDUSTRY        SOME RELATED         SOME RELATED
                 PHYSICAL SYSTEMS      SOCIAL SYSTEMS
                   COMPUTER            ADVERTISING
                   SCANNER             AUTHORS
                   ELECTRICAL          ANIMATORS
                     OUTLET             SET DESIGN
COMMUNICATIONS     RADIO
                     SATELLITES
                   CAMCORDER
                   TELEVISION

                    POWER SAW          ARCHITECTURE
                    AIR                 DESIGN TEAM
 CONSTRUCTION        COMPRESSOR         REAL ESTATE
                    CRANE              SURVEYOR
                    BACKHOE
                    CHAINSAW           LANDSCAPE
                    IRRIGATION          DESIGN
    GREEN            SYSTEM             FORESTRY
                    GREENHOUSE         COMPOSTING
                    LAWN MOWER          SERVICES
                     FOOD MIXER          HEALTH SPAS
                     STETHOSCOPE         WALK-IN CLINICS
   SERVICE           HAIR STYLIST’S      ECO-TOURISM
                      CHAIR
                     DENTIST DRILL
                     CAR HOIST           SMALL ENGINE
                     DIAGNOSTIC           REPAIR
                      EQUIPMENT           AUTO BODY
TRANSPORTATION       HIGHWAY              REPAIR
                     GAS PUMP            GAS STATIONS
                     TRUCKS              AERONAUTICAL
                     AIRPLANES            ENGINEER

  ALL SYSTEMS (AND SUB-SYSTEMS) HAVE INPUTS AND
   OUTPUTS.
  INPUTS ARE ALL THINGS THAT GO INTO A SYSTEM TO HELP
   MAKE IT FUNCTION.
  SOME EXAMPLES OF INPUTS COULD BE FORCES, ENERGY, OR
   RAW MATERIALS.
  AS AN EXAMPLE, THE INPUT FOR A CAN OPENER WOULD BE
   THE FORCE THAT IS PLACED ON THE HANDLE BY THE PERSON
   OPERATING THE OPENER.
  OUTPUTS ARE ALL OF THE TASKS OR SERVICES THAT A
   SYSTEM PERFORMS.
  IN THE CASE OF THE CAN OPENER, THE OUTPUT WOULD BE THE
   BLADE CUTTING OFF THE LID OF THE CAN.
  ANOTHER GREAT EXAMPLE OF THE INPUT AND OUTPUT OF A
   SYSTEM WOULD BE RIDING BICYCLE.
  THE INPUT OF THIS SYSTEM WOULD BE THE FORCE THAT THE
   RIDER IS APPLYING TO THE PEDALS OF THE BIKE. THE DESIRED
   OUTPUT OF THE SYSTEM WOULD BE THE FORWARD MOVEMENT
   OF THE BICYCLE.
  WHILE ALL SYSTEMS HAVE DESIRED OUTPUTS, THEY CAN ALSO
   HAVE SIDE EFFECTS.
  SIDE EFFECTS OF A SYSTEM ARE UNDESIRED OUTPUTS OF A
   SYSTEM.
  THE OBVIOUS DESIRED OUTPUT OF DRIVING A VEHICLE WOULD
   BE MOTION. SOME SIDE EFFECTS OF DRIVING WOULD BE:
    1.AIR POOLUTION
    2.TRAFFIC CONGESTION
    3.NOISE POLLUTION
    4.LOSS OF NATURAL HABITAT DUE TO ROADS AND PARKING
      SPACES
 SINCE EVERYONE HAS A CHOICE IN WHAT SYSTEMS WE USE
  AND THE WAY THAT WE USE THEM, WE ALSO HAVE A
  RESPONSIBILITY TO MAKE WISE CHOICES.
 SYSTEMS THINKING INVOLVES THINKING ABOUT HOW THE
  PARTS OF A SYSTEM WORK TOGETHER, AND ALSO ABOUT
  TRYING TO UNDERSTAND HOW SYSTEMS AFFCT PEOPLE,
  OTHER ORGANISMS, AND THE ENVIRONMENT.

								
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