1.
When an iron bar is heated it gets longer. This is because the particles in the bar
A
change shape
B
get bigger
C
get closer together
D
move further apart
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When an iron bar is heated it gets longer. This is because the particles in the bar
change shape
get bigger
get closer together
move further apart
Particles have random motion. This means
the particles always travel in straight lines
the particles stand still
the path of the particles cannot be predicted
the path of the particles are curved
On a cold, damp morning there is mist in a garden. Mist is a mixture of
a liquid and a gas
a liquid and a solid
a solid and a gas
two different liquids
In a solid substance the particles
are far apart
change size
do not move
touch
In a gas the particles
are far apart
change size
are close together
move slowly
During heat conduction in solids
the energy in the particles expands
the particles get cooler
the particles lose energy
the particles pass on energy by colliding
Diffusion provides evidence that
all matter is made from particles
particles collide
particles have different sizes
particles move by themselves
Choose the statement that is incorrect.
All substances are made of particles.
Matter contains particles.
Solids, liquids and gases are called the three states of matter.
Some liquids do not contain particles.
Boiling happens when
a gas turns to a solid
a liquid turns to a gas
a solid turns to a gas
a solid turns to a liquid
A substance with a fixed shape is called a
foam
gas
liquid
solid
A substance that is a liquid is
crystal
ice
steam
water
A gas can be compressed because
gases have always got air in them
the particles can be squeezed
the particles shrink
there are gaps between the particles