WorksheetsTopic 4 test
Total questions: 20
Worksheet time: 11mins
Which of the following is a pure substance?
Seawater
Air
Table salt (sodium chloride)
Salad
Which of the following best describes a mixture?
A material with a definite chemical composition
A physical combination of two or more substances
A single type of atom
A material that cannot be separated
Determine whether the following statement is true or false:
A mixture is a combination of two or more substances in which no new substances are formed.
True
False
Sterling silver is a combination of silver and copper.
Silver and copper are each made up of only one type of stuff.
Identify two correct statements.
Silver and copper are pure substances
Sterling silver is a pure substance
Silver and copper are mixtures
Sterling silver is a mixture
Determine whether the following statement is true or false:
It is possible to mix solids with solids, liquids with liquids, and solids with liquids, but gases are never components of mixtures.
True
False
Determine whether the following statement is true or false:
In both suspensions and colloids, particles of one substance are suspended in another substance.
True
False
Identify which two of the following sentences are true.
Colloids do not separate into their components if left to stand
Colloids separate into their components if left to stand
Suspensions separate into their components if left to stand
Suspensions do not separate into their components if left to stand
Determine which two words complete the sentence correctly.
If small particles of rock mixed in water are ____________ enough, they will settle out as ____________ .
small, sediment
large, emulsion
large, sediment
small, colloid
Determine whether the following statement is true or false:
The suspended particles in colloids are smaller than the suspended particles in suspensions.
True
False
Madhuri buys a brand of apple juice like that pictured to the left. It has a golden colour and if you shake it you can still see through it clearly. Identify the type of substance apple juice could be classified as.
a colloid
a suspension
a suspension and a colloid
neither a suspension nor a colloid
Identify which description below applies best to whipped cream.
a colloid of air suspended in liquid cream
a colliod of liquid cream suspended in air
a suspension of air suspended in raw milk
Complete the following sentence (there are two possible answers).
A solution is a type of mixture in which the particles:
allow light to pass straight through
scatter light
are extremely small
settle out to form a sediment
Identify which list orders the three types of mixtures from largest to smallest particle size.
colloids, suspensions, solutions
solutions, colloids, suspensions
suspensions, solutions, colloids
suspensions, colloids, solutions
Many substances dissolve in water. Select two other ways of saying the same thing.
Many substances are insoluble in water
Water is a poor solvent
Water is a good solvent
Many substances are soluble in water
Determine which of these everyday activities doesn't involve dissolving one substance in another.
Mixing salt into pasta sauce
Mixing cordial into water
Cleaning oil-based paint from a paint brush using turpentine
Spraying hairspray
Which of these is a homogenous mixture?
Salad
Orange juice with pulp
Air
Sand and water
Which of these is a heterogenous mixture?
Saltwater
Air
Ice cream with chunks of chocolate
Vinegar
In a solution of sugar and water, sugar is the:
solvent
solute
mixture
pure substance
When you stir oil and water together, they form:
a suspension
a homogenous mixture
a solution
a pure substance
Why is air considered a mixture and not a pure substance?
Because it has a fixed composition
Because all parts are chemically bonded
Because it contains different gases that retain their own properties
Because it is only made of nitrogen
