Download Systems

Systems
A view of a system requires
understanding the whole in terms of
interacting component subsystems,
boundaries, inputs and outputs, energy
transformations and feedback.
Systems Definitions
• Two or more individual parts that work
together to perform a single function (job)
and combine to form a whole. Matter
energy and information can flow through a
system.
Systems Vocab
• Input- Something put into a system or expended in its operation
to achieve output or a result
• Output- The energy, power, or work produced by a system.
• Components- being or serving as an element (in something
larger); composing; constituent
• Products- Something produced by human or mechanical effort
or by a natural process.
• Transformations- change in form, appearance, nature, or
character
• Most things are made of parts
• When parts are put together, they can do things
that they couldn’t do by themselves
• Something may not work as well if a part is
missing, broken, worn-out, mismatched, or
misconnected
Some common science systems
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Earth - Moon system
Solar system
Convection currents
Car and ramp
Grand Canyon
Stream table
Levers and pulleys
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Volcanoes
Weather
Water cycle
Lava lamps
Human body
Ecosystems
Pendulums
Inputs and Outputs
• Every system has an INPUT
and OUTPUT. Its OUTPUT is
the function (job) that it does
or the result of its job. What is
its INPUT?
Inputs can be….
• ENERGY—in some form. (light,
heat
• MATTER—some kind of “stuff” so
it can do its job
• INFORMATION
Inputs and Outputs
• Systems have inputs - things that get put
in to make the system function.
• Systems have outputs – what they do, and
sometimes other things like what they
produce.
Inputs
• In order to carry out their purpose,
systems need an input of some kind of
energy. Sometimes they need other inputs
of matter (stuff) or information too.
• OUR DEFINITIION: An input is something
that enters the system. It can be matter
(stuff), information, or energy
Forms of Energy Input
• There are lots of kinds of energy. Some common
kinds are:
• Electrical
• Thermal (heat)
• Mechanical (movement)
• Nuclear
• Chemical (food is one example; a battery is
another)
• Sound
• Light
What kind of energy input is
needed by these systems?
Output
• Outputs from a system can include what
they do, energy, information, and any
other matter (stuff) that comes out.
• OUR DEFINITION: An output is something
that leaves the system. It can be matter
(stuff), information, or energy
What kind of energy output is
produced by these systems?
Outputs can become inputs.
• Sometimes the output from one system
can become the input for another system.
Practice
• Name the inputs and outputs for a dairy
cow.
Practice
• Name the inputs and outputs for broccoli.
Practice
• Name the inputs and outputs for a toaster.
Sometimes systems are too large
to study so they are broken down
into smaller subsystems.
A subsystem is a
system within a
system
Subsystems
Cooling system of an engine.
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(Boundaries)
System Framework
Component
s
Inputs
Outputs
Energy
Transformations
Notes Complete
1. Bring up for a stamp if finished with the
notes.
2. Grab the house and car as a system
assignment on the counter and work on it
as a group.