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WorksheetsD4 Review
Total questions: 20
Worksheet time: 11mins
Which of these is NOT an example of a physical change?
crumpling up a piece of paper
ice-cream melting
chopping up carrots
a reaction of baking soda and vinegar
A change of state is a physical change.
True
False
Why do particles move slower in solids than in gases?
Because solid particles are heavier.
Because solid particles are lazy.
Because gas particles have more energy.
Because gas particles are smaller.
What has to happen for a solid to change to a liquid.
Add energy
Lose energy
Keep the energy the same
Make it colder
What happens to a liquid if enough energy is removed?
It will condense
It will freeze
It will boil
It will sublimate
The ice in the picture is (a) (changing from a solid to a liquid).
Why do scientists wear heavy protection when they work with liquid oxygen?
It is extremely hot.
It might attack them.
It is extremely cold.
It is dangerous to look at.
The dry ice in the picture is changing from a solid to a gas. This is called ...
vaporization
freezing
melting
sublimation
When a gas changes to a liquid, the density ...
increases
decreases
stays the same
When a gas changes to a liquid, the volume ...
increases
decreases
stays the same
When a gas changes to a liquid, the mass ...
increases
decreases
stays the same
When the volume of matter increases because heat energy is added, it's called ...
thermal mass
thermal contraction
thermal expansion
thermal volume
Which of these are examples of mixtures?
oil and water
sugar and salt
carbon dioxide
air
milk
All mixtures can be separated using their physical properties.
True
False
Which method could you use to separate a solution of salt and water?
Filtration
Magnetism
Buoyancy
Distillation
Which of these mixtures can be separated using filtration?
sugar and water
sand and water
baking soda and iron powder
soda water
Which of these mixtures are solutions?
sugar and water
air
soda water
carbon-steel (alloy)
oil and water
In a solution of salt and water, which substance is the solvent?
salt
water
the beaker
sugar
Which of these are examples of colloids?
salt and water
clouds
milk
smoke
sand and iron nails
A chemical reaction is the same as making a mixture.
True
False
