When a solid is heated, it changes into a liquid. What do we call this process?
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Condensing
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Freezing
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Dissolving
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Melting
Q.2.
Which of these is true of gases?
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Unless held in a sealed container, gases keep expanding in volume
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A gas takes the same shape as its container
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A gas will have the same volume as its container
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Gases can be poured from one container to another
Q.3.
What is the freezing point of water?
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-55o C
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-12o C
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0o C
0%
32o C
Q.4.
When you fill a jug with sugar, it appears to have the same shape as the jug. You can also tip sugar from one container to another. Is sugar a solid, a liquid or a gas?
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A liquid
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A solid
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A gas
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A condensed gas
Q.5.
Which of these is true of solids?
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Solids can be cut or shaped
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A solid expands to fill its container
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Solids will stay the same shape and size unless acted upon by a force
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Solids can be grasped (held on to)
Q.6.
Which has the most densely-packed particles?
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Solids
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Liquids
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Gases
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Particles are equally dense in solids, liquids and gases
Q.7.
Which of these is true of liquids?
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The shape of a liquid does not change
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A liquid takes the shape of its container
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Liquids are runny and can be poured
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The volume of a liquid does not change
Q.8.
Which of these has the least densely-packed particles?
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Solids
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Liquids
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Gases
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Both liquids and gases
Q.9.
When a liquid cools enough it becomes a solid. What do we call this process?
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Evaporating
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Condensing
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Freezing
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Dissolving
Q.10.
What is the boiling point of water?
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0o C
0%
50o C
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100o C
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212o C
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