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WorksheetsSEPARATION METHODS
Total questions: 15
Worksheet time: 15mins
Which one is a form of heat transfer?
Conduction
Absorption
Refraction
Reflection
Which of the following statements about convection is true?
Convection always involves the circulation of a liquid or gas
All types of currents are convection currents
Convection occurs between solids only at high temperatures
Convection can only occur during the process of boiling
As a thunderhead builds, warm air at the Earth's surface rises and cold air high aloft sinks downward. What heat transfer process is occurring here?
Conduction
Convection
Radiation
Induction
A gardener carefully places her outdoor thermometer in a shady location out of direct sunlight, so that it doesn't give incorrectly high readings. What method of heat transfer is she trying to avoid?
Induction
Conduction
Radiation
Convection
Which one of the following do all methods of heat transfer require?
The movement of particles
A difference in thermal energy
A liquid or gaseous state
Direct physical contact
Which of the following statements about radiation heat transfer is true?
A radiant heat source transfers heat by energizing the molecules of air around it
Radiation heat transfer does not involve particles
Only glowing objects can be a radiant heat source
Radiant heat transfer explains why a spoon in a cup of hot tea soon feels warm
Liquids ____________________.
have a defined shape and volume
have a defined shape but undefined volume
have an undefined shape but defined volume
have both undefined shape and volume
Why do solids have a fixed shape?
The particles are fixed in place
The particles are closely packed
The particles vibrate
None of these
What is the name of the change when a liquid becomes a solid?
Melting
Freezing
Solidification
Both freezing and solidification
What is sublimation?
When a solid turns into a gas
When a gas turns into a solid
When a gas turns into a liquid
When gas turns into solid
If you want to separate iron filings from sand, you would use a
funnel
magnet
filter
colander or sieve
The process used to separate heterogeneous mixtures of solids and liquids is called ______
filtration
distillation
crystallization
chromatography
A technique that separates a mixture based on the individual substance's tendency to travel across a surface is called _____.
filtration
distillation
crystallization
chromatography
During filtration, an insoluble solid collect on the filter paper. What is this called?
Solute
Filtrate
Solvent
Residue
In the lab, a scientist accidentally dropped a ball bearing into a beaker of hot water and wanted to get it out as soon as possible as the hot water will be used in an experiment. What can he do?
Use paper chromatography
Use distillation to isolate the hot water
Use a magnet to attract the ball bearing and get it out of the hot water
Evaporate the hot water to get the ball bearing
