Flashcards
2.3
Flashcards do conjunto (11)
- 1why are models used in science?Scientists often use models to test or explain something that is difficult to understand.
- 2what is an analogy?The heart is often compared with a water This pump. simple type of model is known as an "analogy.
- 3give an example of an analogy?heart and water pump
- 4what is the difference between the good and bad thought modelsGood 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!
- 5what is the particle model?particle model is a "thought model that attempts to explain the properties of substances.
- 6what are 4 things that the particle model assumes?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.
- 7what are bonds?bonds that hold the particles in the solid closely together
- 8what do particles in a solid doThe particles in solids are closely packed in fixed positions.
- 9what 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.
- 10what 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.
- 11—
Informações
- Descrição
- FlashCards sobre 2.3, criado por Abdalla Kamr em 17-05-2017.
- Criado por
- Abdalla Kamr · mai 2017
- Atualizado
- 17 mai 2017
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