Flashcards
Understanding physical change
Cards in this deck (20)
- 1What do scientists use to understand physical change?Models
- 2What does the particle model say about solids?They are incompressible nad hold their shape
- 3What does it say about liquids?They are incompressible and flow to hold the the shape of the bottom of their container
- 4What does it say about gases?They are compressible and filol their container
- 5What does the particle model state
- 6Why are solids incompressible?Because the attraction between particles binds them tightly together
- 7Why are gases compressible?Gas particles arent connected at all
- 8What is expansion?When density decreases and size increases
- 9What is contraction?When density increases and size decreases
- 10What happens when matter is cooled?It contracts
- 11What happens when matter is heated?It expands
- 12Why do liquids contract when cooled and expand when heated?It vibrates more when heated
- 13What happens if a gas is cooled in a balloon?The balloon contracts
- 14What happens if the gas in a balloon is heated?The balloon expands
- 15What are mixtures?when 2 or more pure substances are mixed together
- 16What are solutions?When a solid (solute) and a liquid (solvet) mix
- 17What is diffusion?When 2 liquids or 2 gases mix evenly without stirring
- 18How do gas particles move during diffusionThey move in a zigzag fashion
- 19How do you speed up diffusion?Increase the temperature
- 20Is diffusion faster or slower in liquids?slower
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- Flashcards on Understanding physical change, created by Khalid Badaso on 12/06/2016.
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- Khalid Badaso
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