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PHYSICS PAPER 1
TOPIC 3 PARTICLE MODEL MATTER
Changes of State and Particle Model
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Cards (20)
What is the definition of density?
The
mass
per unit
volume
of a material
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What is the equation for density?
⍴
=
m/v
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What are the units for density?
kg/m³
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What is the least dense state of matter?
Gas
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What is the order of states of matter from least to most dense?
Gas
,
Liquid
,
Solid
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How are particles arranged in a solid?
Tightly packed in a
regular
arrangement
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What can particles in a solid do?
Vibrate
on the
spot
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How are particles arranged in a liquid?
Close together, but
irregularly
arranged
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What can particles in a liquid do?
Flow over
each other
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How are particles arranged in a gas?
Separated with no
regular
arrangement
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What can particles in a gas do?
Move
freely
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What is always conserved during a change of state?
Mass
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How does a change of state differ from a chemical change?
Material can return to
previous
properties
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What is sublimation?
Solid
changes into gas without
liquid
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What is evaporation?
Liquid changes into
gas state
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What is the opposite of evaporation?
Condensation
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What happens when water boils in an open pan?
Some water
evaporates
, decreasing
mass
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Why does the mass of the pan decrease when water boils?
Water
evaporates
and turns into vapour
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What processes occur when a bathroom mirror mists up?
Water vapour
condenses
on the cooler mirror
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What are the steps involved when a bathroom mirror mists up?
Hot water
evaporates
to form
vapour
Vapour lands on the cooler mirror
Vapour
condenses
to liquid on the mirror
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