English National Curriculum Science

4. Show how mixtures can be separated using filtration

Mission Objectives

Explain the term "filtration"

Describe under which conditions a mixture can be separated by filtration

Build a simple water filter

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Keywords

Words and meanings to learn

filtration

a process used to separate solids from liquids or gases by passing the mixture through a filter medium that allows the liquid or gas to pass through, but retains the solid particles

filter medium

a porous material such as a filter paper, a ceramic material or a cloth

filter paper

a paper-based barrier used to separate solid substances from liquids or gases

filtrate

the liquid or gas that passes through the filter medium and is collected on the other side of the filter; it is composed of the liquid or gas that was present in the mixture being filtered, but without the solid particles that were retained by the filter

residue

the solid particles that remain on the filter after filtration; it is composed of the solid particles that were present in the mixture being filtered, and is typically collected for further analysis or disposal

This lesson has been written by

Dr Shannon Weldon

Shannon started her journey with Developing Experts by completing PHD placement while studying for her Doctorate in Developmental Biology at the University of East Anglia. Shannon has since joined the team full-time as a Project Manager working with the company's industry partners. Shannon knows a lot about chickens!

Dr Peter Klappa

Peter Klappa studied Biology (BSc Hons and MSc) at the Ludwigs-Maximilian University in Munich, Germany, where he also obtained his PhD in molecular and cellular biology. He is a National Teaching Fellow and a Senior Fellow of the Higher Education Academy. As a trained Biology and Chemistry teacher, Peter has taught sciences for over 30 years, both at pre- and post-entry to university. For his excellence in teaching, Peter has received numerous awards and prizes and was nominated for the Teacher of the Year award by the Higher Education Academy in 2015 and 2019.

Required Resources

Resources: Two litre plastic bottle; scissors; cotton wools; activated carbon; sand; gravel; beaker; jug; water; soil and small solid pieces (e.g. bits of plastic).

Core Handout: Instructions to build a water filter. 

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