Science-Technological Systems Flashcards
What is a system?
A group of parts, mechanisms, devices or machines that are made to perform a specific task
Ex: a train: each component has a specific function and can be split into smaller systems
What are characteristics of a system?
- Overall function
- Controls
- Inputs
- Processes
- outputs
What is an overall function?
Describes what a system needs to do
Inputs?
Elements that go into a system to help its functions- INPUTS: -People -Equipment -Materials - Energy - Information -Capital(money) -time
Process?
A series of actions that a system has to do to inputs to fulfil its role
Controls?
Manage or change wha happens in a system
Controls can be mechanical, electric, or electronic
Outputs?
Elements that leave the system once the process is complete
Called:results
SYSTEMS RARELY HAVE 1 OUTOUT
What are components of a system?\
- System
- Subsystems
- Parts
What are subsystems?
Smaller components of a system separated into parts.
What is a subsystem of a car?
Electrical system, breaking system, transition system, exhaust system, steering system, fuel supply system, suspension system, gasoline system, etc
Parts that can be divided into indivisible parts
What are subsystems of bikes?
Wheel, breaks, gears etc
What is a manufacturing process sheet?
Describes all the steps needed to create every part of a technical object
What is mass production
Something in very large quantities
What is the header of manufacturing process sheet
Header contains general information about the part being made
Ex: title( Manufacturing process sheet)
part (clock face)
Material (white cardboard with dimensions)
What are the 5 techniques required to make a technical object
- Measuring and marking
- Machining and forming
- Finishing
- Assembling
- Disassembling
Describe 1. Measuring and marking
The materials must be measured carefully and cut lines. Measurements must be PRECISE
Using rulers, metre stick, a compass or protractor
Step 2 Machining and forming
Parts need to be cut using tools, and safety equipment or they are folded to give them the needed shape
Go over steps in the slides
Step 3. Finishing
You must remeasure the parts sand pieces or file them stain, pain or varnish
What is energy?
It is the capacity to produce change, a movement where a change happens
4 types of useful energy?
Mechanical
Thermal energy
Luminous energy
Electrical energy
What is mechanical energy?
Comes from the motion of an object or its position in space
What is thermal energy?
Comes from the Amit ion of particles in matter.
Usually produced from combustion. (A chemical process where a substance reacts with oxygen and gives off heat)
What is Luminous energy?
Is carried by light ( aka radiant energy) ex; electrical energy is transformed into luminous energy in lamps.
What is electrical energy?
Is energy associated with the movement of electricity ⚡️
Electricity can be carried over long distances
What is an energy transformation?
It is the conversion of one form of energy to another.
Why is energy transformation useful?
Human cannot always use natural energy in direct form, so it has to be transformed to something more useful.
Ex: winds cants heat our homes but we can covert wind energy into electrical energy, then reconvert it to thermal energy.
