Elements
What are the two types of elements?
metals and non-metals
What is a compound?
A substance which contains 2 or more different elements joined by chemical bonds
What is a solution?
Made up of a solute dissolved in a solvent.
Which separation technique allows solid to settle to the bottom of a liquid?
Sedimentation
Name an everyday device that uses filtration technology
Teabags, washing machines, collanders
What are the properties of metals?
Shiny, hard, malleable, ductile, good conductors
What are examples of compounds?
(water and carbon dioxide)
What is a solute?
The solid part of a solution that gets dissolved in a solvent.
Which technique separates a mixture into its colours
chromatography
The process used in alcohol production and oil purification.
distillation
What are the properties of non-metals?
Dull, brittle, poor conductors of heat and electricity
What is a mixture?
Contains a number of different elements and compounds that are not joined by chemical bonds, so it is easy to separate.
What are examples of solvents?
Water and alcohol.
The process of allowing liquid to evaporate, leaving the solute behind.
evaporation (or crystallisation)
What is the process used to separate sand and water?
filtration
What is the symbol for carbon?
C
What are examples of mixtures?
Cordial, a cup of tea, air, sunscreen.
What is the solvent in a solution of sea water?
Water
The separation of a mixture by allowing only the tiny particles to move through tiny holes.
sieving (or filtration)
What is the universal solvent?
The most important solvent on Earth
WATER!
What is an element?
A substance in which all atoms are the same
What is an atom?
The smallest particle of a substance which behaves as that substance.
Which word mean ‘will dissolve’?
soluble
Used to separate iron filings from sand.
a magnet
What is the correct order to separate a mixture of sand, salt, rice and iron filings?
1. Sieve out the rice and remove the iron filings with a magnet
2. Add water to dissolve the salt
3. Filter out the sand
4. Evaporate the water to leave the salt