Compounds and Mixtures

A series of free Science Lessons for 7th Grade and 8th Grade, KS3 and Checkpoint Science in preparation for GCSE and IGCSE Science.

Compounds and Mixtures
Element - A substance made up of only one type of atom.

Compound - A substance made up from two or more elements chemically bonded together. They can only be separated by a chemical reaction.

Mixture - A compound made up from different elements and/or compounds not chemically bonded together. Mixtures can be separated using techniques such as filtration, chromatography, evaporation and distillation.

Investigating Mixtures and compounds
Comparing physical properties of a mixture of iron and sulfur, and a compound of iron and sulfur.

Try out our new and fun Fraction Concoction Game.

Add and subtract fractions to make exciting fraction concoctions following a recipe. There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics of fraction addition and subtraction or challenge yourself with the insane level.

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