Science Matters
Checklist
CALDERGLEN
HIGH
SCHOOL
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All substances are either solid, liquid or
gas
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Solids have a fixed shape and volume
(don’t change).
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Liquids have a fixed volume but not a
fixed shape. They take up the shape of
the container they are placed in.
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Gases spread out to fill the container
they are in. Their shape and volume are
not fixed.
What I should know or be able to do
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All solids, liquids and gases are made up
of microscopic particles called atoms
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In solids the particles have very small
spaces. They are close together in neat
rows and make small vibrations.
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The arrangement
of
particles in a
solid.
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What I should know or be able to do
Skills I have practised in
this topic
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What I should know or be able to do
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In a liquid the particles have small spaces
between them. They are touching but
they are not arranged in neat rows. The
particles can change places and slide over
each other (flow).
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Investigative Skills (Nappy Challenge)
-Hypothesis
-Planning
The arrangement
of
particles in a
liquid
-Fair testing
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Gases have big spaces between the
particles and constantly move about.
-Recording & presenting
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The arrangement
of
particles in a
gas
Group working skills—polymorph
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Gases have most energy and solids least.
Presentation skills—Polymorph
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Gases can be easily compressed because
they have large spaces between their
particles
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What I should know or be able to do
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What I should know or be able to do
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Liquids and solids cannot be compressed
because their particles are close
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Evaporation is when a substance changes
from a liquid to a gas.
together.
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Mixing of substances can result in particles going into spaces between particles
of another substance. This can cause a
reduction in volume.
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Diffusion is the movement of a substance
from an area of high concentration to low
concentration.
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Gases diffuse easily.
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Liquids diffuse (slower than gases)
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Solids do not diffuse easily.
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Melting is when a substance changes from
a solid to a liquid.
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A substance will melt at a temperature
known as its melting point.
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A substance will evaporate at a temperature known as its boiling point.
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Freezing is when a substance changes
from a liquid to a solid.
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A substance will freeze at a temperature
known as its freezing point.
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Expansion occurs when a substance is
heated.
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Expansion is when the particles in a substance move further apart
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Different substances expand at different rates