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The Atomic Model: Hit and Miss
Science Standards Academy 2014
Modelmodel
Definition:A version of an original object that is easy
to see
Used in a sentence:I created a model of the solar system in my
science class.
Types of ModelsModels can represent …
Example
Objects that are too small to see
Model of an Cell
Objects that are too big to see
Model of the solar system
Objects that no longer exist
Model of dinosaurs
Objects that have not yet been invented
Prototypes for creations
Events that occur to slowly to see
Model of mountain formation
Events that occur too fast to see
Model to predict an earthquake
Events that have yet to happen
Models of weather systems
Think of an example of a model that wasn’t listed on the previous slide. List at least one example.
Limitations of ModelsA limitation is a weakness or shortcoming, in this case of a model. Models can be very useful. They can help you understand things that are really big, really small, or very hard to see. However, models are not perfect, models come with limitations. These types of limitations include:
• Portraying something too simplistically• Not showing distances accurately• Not showing movement or interactions
Portraying something too simplistically
However, this model of Earth’s layers doesn’t show what the layers are made up of, how thick they really are, or any details about sub-layers.
• This model of Earth’s layers can help someone understand that the center of the Earth is not hollow and is made up of different layers.
Not showing distances accuratelyA Globe is a great model for
seeing the Earth a a whole, showing relative size and shapes of continents, and locations of oceans.
However, you would not use a globe to give driving directions or give exact distances from one location to another, the scale makes the distances inaccurate.
Doesn’t show movement or interactions
• This model of the solar system does a good job of showing relative sizes of the planets compared to each other and the sun.
• However, this model does not show the movements or orbits and rotations of the planets.
Now lets take the information you just learned about the limitations of models and apply that to your previous knowledge of atoms.
Look at this model of the atom, what do you think the biggest limitation is of this model?
a.Distances are inaccurate
b.The model is too simplistic
c.It does not show movement or interactions
This model is too simplistic. While it is useful for beginners it does not give a lot of information about atoms.
Look at this model of the atom, what do you think the biggest limitation is of this model?
a.Distances are inaccurate
b.The model is too simplistic
c.It does not show movement or interactions
While identifying parts of the atom and different orbitals, the distance between particles in atoms cannot be represented to scale in models
Look at this model of the atom, what do you think the biggest limitation is of this model?
a.Distances are inaccurate
b.The model is too simplistic
c.It does not show movement or interactions
While getting a better understanding of relative size, the motion of electrons cannot be described in most models