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AQA GCSE Physics Weydon > 3. Particle Model of Matter > Flashcards

3. Particle Model of Matter Flashcards

1
Q

1. Describe the arrangement of the particles in a liquid

A
  1. particles touching but randomly organised
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2
Q
  1. Compare the properties of a liquid and gas
A
  1. Liquid can pour but can’t compress, more dense than gases. Gas can pour and can compress as there is lots of space between particles.
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3
Q
  1. What is melting?
A
  1. Solid to liquid. Bonds break and particles can move over each other.
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4
Q
  1. What is condensing?
A
  1. Gas to liquid. Bonds form.
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5
Q
  1. How can we tell from a graph that a change of state is occurring?
A
  1. The temperature doesn’t change.
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6
Q
  1. For a given amount of a substance when do its particles have the most energy?
A
  1. As a gas.
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7
Q
  1. Which energy stores make up internal energy?
A
  1. Kinetic energy store (how much they are moving) and Potential energy store (how far apart the particles are)
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8
Q
  1. Why does the temperature rise when a substance is heated?
A
  1. Energy goes in to the kinetic energy store.
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9
Q
  1. Which energy store is filled when the energy causes a substance to evaporate?
A
  1. The potential energy store
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10
Q
  1. Define density.
A
  1. Mass per unit volume
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11
Q
  1. What are the units for volume?
A
  1. cm3 or dm3
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12
Q
  1. If something is more dense what does that mean?
A
  1. That the same volume of it would have a higher mass
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13
Q
  1. How do you calculate the volume of a regular object?
A
  1. Length x width x height
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14
Q
  1. How do you calculate the volume of an irregular object?
A
  1. Put it into water and measure the amount of water displaced
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15
Q
  1. What is latent heat?
A
  1. The energy transferred to a substance when it changes state
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16
Q
  1. When a substance changes state why does the temperature not increase?
A
  1. The energy goes into the potential energy store (and not the kinetic store which changes the temperature)
17
Q
  1. What is specific latent heat?
A
  1. The amount of energy needed to change the state of 1kg of a substance
18
Q
  1. What is specific latent heat of vaporisation?
A
  1. The amount of energy needed to evaporate 1kg of a substance
19
Q
  1. Describe the motion of gas particles
A
  1. Move randomly at high speeds in all directions
20
Q
  1. What causes gas pressure?
A
  1. Gas particles colliding with the surface of a container
21
Q
  1. How does temperature affect gas pressure?
A
  1. Higher temperatures = higher gas pressures (the gas particles move faster and so collide with the surfaces more often and with more force)

AQA GCSE Physics Weydon (4 decks)

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