1 of 13 © Boardworks Ltd 2010 Investigating Physical Properties Unit 2: Chemistry and Our Earth.

1 of 13 © Boardworks Ltd 2010

Investigating Physical Properties

Unit 2: Chemistry and Our Earth

© Boardworks Ltd 20102 of 13

Solubility experiment


Using solvents


Your task is to make a table of the physical properties of substances that could be used to make a new saucepan. Suggest which materials are the most suitable to make each part of the product and why.

The data for your table should include:a visual description of the materialresults from an experiment to classify the material as a conductor or an insulatorresults from an experiment to find out if the substance will dissolve in water.

Use textbooks or the internet to find out the melting and boiling points for different materials.

You are a product designer. Reference tables are useful for helping you choose materials to make new products.


Rock salt is a sandy rock mainly made of sodium chloride. It is sprayed onto roads during cold weather to reduce the problem of ice forming. It does this in two ways:

sandy impurities allow better grip between tyres and the road

sodium chloride mixes with water and reduces its melting point, so that the ice becomes a liquid saltwater solution.

Case study: gritting roads

The melting point of water is 0°C at one atmosphere of pressure. In many parts of the world, temperatures drop below 0°C and surface water forms dangerous patches of ice on roads.


Cells

Unit 4: Biology and Our Environment


Animal cells


Plant cells


Sort the organellesSort the organelles


Sources of Energy

Unit 3: Energy and Our Universe


A single wind turbine doesn’t generate a lot of electricity. Wind turbines are usually required in large numbers to have a significant impact on electricity production. A group of wind turbines is called a wind farm.

Wind farms require space in open areas, but the land beneath them can also be used for farming at the same time.

Why are wind farms built?

Wind farms can also be located off the coast, in the sea. Ships are able to pass below the turbine blades.


Should we use wind power?


Multiple-choice quiz

1 of 13 © Boardworks Ltd 2010 Investigating Physical Properties Unit 2: Chemistry and Our Earth.

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