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WorksheetsY7 Pure substances and mixtures core questions TG
Total questions: 20
Worksheet time: 12mins
What are the tiny particles that substances are made from?
molecule
atom
mixture
particle
A molecule is......
a pure substance
a mixture
2 or more atoms bonded together
a substance that doesn't dissolve
what are substances made of only one type of atom called?
particle
atom
compound
element
What are substances made of two or more different atoms chemically bonded together called?
compound
mixture
atom
element
In chemistry what is a PURE substance?
A substance made from....
2 or more atoms bonded together
a single element or compound
tiny particles
mixtures
What are substances made of two or more types of atoms/compounds
NOT CHEMICALLY BONDED together called?
Compounds
solutions
mixtures
substances
What do we call a substance that does not dissolve?
mixture
solution
soluble
insoluble
What do we call a substance that DOES dissolve?
solution
soluble
mixture
insoluble
What is the part that dissolves called
solvent
solution
solute
solitude
What is the liquid the substance dissolves in called?
solvent
sollution
solute
solitude
What do we call a mixture of a solvent and a solute?
solvent
solitude
solution
solute
Give THREE ways of INCREASING the rate of dissolving
stirring
cooling
heating
crushing the solute
What do we use to separate the soluble solute from the solution?
PICK TWO
Evaporation
Heating
Crystallisation
Cooling
What are the TWO stages of distillation?
Heat (evaporate liquid) then cool (condense)
Cool (condense) then heat (evaporate liquid)
What do we use to separate an insoluble solute from a solution?
Evaporation
Mixing
Filtration
Heating
What is the separation technique used to separate mixtures of soluble substances?
Photography
Biography
Calligraphy
Chromatography
What are the TWO pieces of equipment needed for FILTRATION?
Filter funnel
Spoon
Filter Paper
Film
What is the substance left in the filter paper after filtration called?
Filtrate
Residue
Filter
Resistance
what is the liquid that has been filtered called?
Residue
Filter
Filtrate
Reside
What two errors can occur when carrying out chromatography?
Line drawn with a pen
Solvent level above the ink will be separated
Nothing
