MrBadmusSummer First Half

Year 7 · Summer First Half

Chemistry

4 lessons from 1 unit.

Unit C3 · lessons 1 to 4 of 7

Mixtures and separation

Almost nothing you meet is one pure substance. This unit is about telling what is in a sample, getting the parts back out again, and the one test that settles whether something is pure when looking at it cannot.

  1. 01Pure or mixture?ClassifyA carton of juice, a gold ring and a bottle of lab water all claim to be pure. What is the chemist actually asking?Open this lesson
  2. 02Dissolving and solutionsModelSugar stirred into water seems to vanish. What has really happened to it, and what decides how much can go in?Open this lesson
  3. 03FiltrationProcessFilter paper can take sand out of water. What about salt, and why?Open this lesson
  4. 04Evaporation and crystallisationProcessThe salt is dissolved and invisible. How do you get it back, and does the way you do it matter?Open this lesson

Back to all three sciences this half term The whole KS3 Chemistry course