Transcript Model - Where Science Meets Life

Model
A representation of
an object or a system
A Model…
….shows different parts of an object or idea.
A model is used to compare 2
similar things or events focusing
on a particular aspect.
EXAMPLES:
A globe is shaped like Earth.
The brain is similar in shape to a walnut shell.
Scale Models:
The sizes of the model parts is a consistent ratio to
the sizes of the parts of the real objects.
EXAMPLES:
Earth is 4 times larger than its moon, so the object
representing Earth will have to be 4 times larger
than that of the object representing the moon.
Advantage
The reason that we use
models instead of the thing
they represent.
Why use models?
1. Cheaper
2. Quicker
3. Safer
4. Easier to see
5. Easier to understand
1. Models are cheaper, quicker,
and safer than studying problems
or concepts with the real objects.
 For example, an engineer designing the biggest,
strongest bridge would want to discover problems in the
model before spending money on a real bridge that
would fall apart.
2. Models make an idea easy
to see and understand.
We cannot bring the solar system into our classroom. So
we design models to represent the solar system.
We cannot see an atom because of its minuscule size, so
we use the Bohr Model to represent what we cannot see.
Limitations:
Limitations are
restrictions or limits
on the usefulness
of a model.
For example, a model of the solar system shows
distances between the sun and planets, but the model
doesn't show the forces that act on those planets.
You see that a skeleton shows the bones in the body, but
not the muscles that move the bones.
 You see that a walnut shell looks like a brain but does
not show the sections of the brain or how the brain
works.