Salt+of+the+Earth

Explain why most water has chemicals dissolved in it. Describe how to separate a dissolved solid from a liquid. Describe how to get salt from sea water. Describe how salt can be obtained from rock salt.
 * Objectives (what you will learn this lesson)**


 * Starter**
 * Key term quiz / homework review


 * Activities**
 * 1) How much salt is there in the water? [|Watch the demonstration and investigate]
 * 2) Watch the video on hard and soft water
 * 3) Answer textbook questions Q1-6 from p68-69 of Exploring Science (use **full sentences**)
 * 4) Complete the worksheet on [|hard water] (if you need help view [|testing water for hardness], it explains how we can find out whether water is hard or not)
 * 5) Extension: Read and answer questions on [|Ghandi and the Salt Act]

Review completed classwork / key term quiz
 * Summary**

Learn about hard and soft water: media type="file" key="ES8_Ec069_02vco.flv" width="360" height="270" (In the video north and south refers to the UK)
 * Videos**

Answer the questions on [|solution mining]. Either print the worksheet and answer questions in your book or answer on the worksheet, print and paste into your exercise book.
 * Homework**