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Description
Flashcards by Abdalla Kamr, updated more than 1 year ago
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Created by Abdalla Kamr
almost 7 years ago
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| Question | Answer |
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why are models used in science?
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Images (image/jpeg)
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Scientists often use models to test or explain something that is difficult to understand. |
| what is an analogy? |
The heart is often compared with a water This pump. simple type of model is known as an "analogy.
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00000 (image/png)
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give an example of an analogy?
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Heart (image/jpeg)
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heart and water pump
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Water Pump (image/png)
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| what is the difference between the good and bad thought models | Good scientific thought models are always supported by lots of scientific observations and evidence. Bad thought models are quickly dismissed because they don't have much real science behind them! |
| what is the particle model? | particle model is a "thought model that attempts to explain the properties of substances. |
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what are 4 things that the particle model assumes?
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1)All substances are made up of tiny particles that are too small to see even with a normal microscope. 2)Even if it is a very small amount, the particles always have energy and are moving. 3)The particles move about more and move faster as temperature is increased The closer the particles are to one another 4)the stronger the attraction between them. |
| what are bonds? | bonds that hold the particles in the solid closely together |
| what do particles in a solid do | The particles in solids are closely packed in fixed positions. |
| what happens when u increase the temperature in a solid? |
If you increase the temperature, this gives the particles more energy and so they vibrate more.
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Solids (image/png)
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| what happens to the particles in the liquid ,gases & solid? |
the particles are still packed closely together but they are far more loosely bonded than the particles that are in the solid. but The particles in a gas are spread far apart and have nothing holding them together.
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3 Types (image/png)
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