Question

Sometimes an old scientific model is replaced by a new model.

Explain why scientists replace an old scientific model with a new model.

Include an example from Physics in your answer (4 marks)

Answer 1

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Question:-

Explain why scientists replace an old scientific model with a new model.

Include an example from Physics in your answer.

₊˚ ଘ Answer:

A scientific model is created to understand the concepts and explain the reason behind unexplained observations.

But the scientific models cannot explain all the unexplained observations.

When another scientific model which could explain some more observations than the previous model.

This new model replaces the old one.

 One such example in physics is geocentric and heliocentric models.

The geocentric model was based on the principle that all celestial bodies revolve around the earth as its center.

But this model failed to explain some planets move backward instead of forward.

The heliocentric model was based on the principle that all planets revolve around the sun as its center including earth.

 This model was able to resolve the backward and forward motion dilemma.

That is why heliocentric replaced the geocentric model.

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