Gases and Phase Changes

Question 1 of 1

Drag the boxes onto the matching gaps.
  • molecules
  • tend
  • deposition
  • freezing
  • point
  • pressure
  • less
  • same
  • forces
  • strong
  • condensation
  • evaporation
  • sublimation
  • collision
  • melting
  • melt
  • drop


Gases

In a gas, the chemical bonds are not 1 enough to hold atoms or 2 together, and from this a gas is a collection of independent, unbonded molecules which interact mainly by

3 . Gases 4 to take the shape of their container, and are 5 dense than both solids and liquids. Gases have smaller 6 of attraction than solids and liquids. Gas becoming a solid is 7 .

 

Phase Changes

Phases of matter can be changed by a number of things. This includes 19 and temperature.

When a solid becomes a liquid, it is called 20 . When a solid becomes a gas, it is called

21 . When a liquid becomes a gas, it is called 22 (or vaporisation). When a gas becomes a liquid, it is called 23 . When a liquid becomes a solid, it is called

24 . The freezing point and the melting point are said to be the 25 , because any increase in temperature will cause it to 26 and any 27 in temperature will cause it to freeze. This is also the reason that the vaporizing and condensation 28 are the same.



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