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WorksheetsSystems and system models
Total questions: 22
Worksheet time: 12mins
A system is a set of (a)____________parts that work (b)___________
(a) non interacting
(b) together
(a) interacting
(b) together
(a) non interacting
(b) independently
(a) interacting
(b) independently
Another word for an engineered system is ____________system
natural
designed
undersigned
planned
Grouping parts in systems allows us to study how (a)_________, (b)__________and flow in natural or designed systems
(a) matter
(b) energy
(a) air
(b) science
(a) objects
(b) heat
(a) matter
(b) electrons
Parts of system are also called the _____________of a system
sides
angles
temperature
components
_________________: Mater, energy and information that enters a system
Input
output
income
benefits
An algae in an aquarium represents a system and the shrimp is another system, the two systems are considered subsystems of a larger system , they _____________with each other
collide
struggle
interact
hang
In this aquarium, oxygen released by first system " algae" is used by a second system the "red shrimp", this interactions between two systems happen when ------------------------------------
The output of one system is the output of another
The output of one system is the input for another
The input of one system is the input for another
When no inputs exist
Systems and their interactions are ______________, this is why we need models and simulations to understand them
Simple
easy
hard
Complex
Scientists and engineers rely on models and simulations to (a)____________systems and (b) ___________ their behavior
(a) destroy
(b) change
(a) understand
(b) change
(a) understand
(b) predict
(a) change
(b) change
Using a model to investigate a system is usually (a)____________and (b) _________ and easier to study than carrying out investigation in real life
(a) more costly
(b) more dangerous
(a) safer
(b) less expensive
(a) more dangerous
(b) more funny
(a) a waste of time
(b) waste of money
A _______________ helps us understand the structure of an object or system
Simulation
statu
Model
Toy
A_______________is made of numbers and equations
Physical model
Conceptual model
chemical model
Mathematical model
A conceptual model is also known is a mental model because ____________________
It describes the structure of an object
It is a way of thinking of how parts of a system interact
it is a smart way of thinking
It is made of your brain
This model describes only the structure of the digestive system, what kind of model is it ?
conceptual
chemical
mathematical
physical
______________use models to imitate the function, behavior or process under different conditions
Model
Simulation
Objects
Fun city
We know that models should reflect real life objects or systems , what is the problem in the model to the right of this image ?
A model cannot be bigger in scale
The model is not a a model for a smiley
It has wrong proportions (compare the mouth)
it shouldnot be yellow
The model of the building has a problem, what is it ?
Using same color
A model cannot be small
Using wrong quantities of material
the shape should be different
Models have limitations, which means they may not work exactly as the systems and objects they represent, this happens because they are studied ____________________
In side their environments
Outside their environment
in a weird way
in a carless way
Models may fail because it is hard for engineers to _____________________
Work under stressful conditions
To think smartly
To use math
account for every variable in the system
Using a car model and simulation -------------------
helps in testing new ideas
Helps engineers to identify strength and limitations of their design
Prevents costly and dangerous errors
All three options
Natural and engineered system are similar in that they both
Have components and parts
Both have different parts that interact with each other
They both have input
They both have output
Why do scientist and engineers use models to predict the interactions in a system?
Because real life systems are too large to study
Because real life systems are too complex
Because models are less expensive
Allow testing
