Clip description Keywords
Building sculptures out of snow and ice
Building sculptures out of snow and ice

Duration: 01:15

Building sculptures out of snow and ice.

 
Changes in the state of materials (no narration)
Changes in the state of materials (no narration)

Duration: 00:52

A compilation of images of a range of materials which have been mixed, burnt, melted and cooled. Reversible and irreversible changes are demonstrated.

 
Changing materials - rust
Changing materials - rust

Duration: 01:04

Rust is created by the chemical reaction of iron, water and oxygen. A scratch on the paintwork of a car and the Albert Memorial in London are used to demonstrate the effects of rust.

 
Changing state - water and dissolved minerals
Changing state - water and dissolved minerals

Duration: 01:44

An experiment to demonstrate how minerals dissolve in water and a look at which minerals and metals are found in different types of water.

 
Changing state – whipping cream and butter
Changing state – whipping cream and butter

Duration: 03:22

Presenter Dr Yan explains the chemical changes which take place when cream is whipped to make butter.

 
Cooking eggs - an experiment
Cooking eggs - an experiment

Duration: 01:02

One way to cook eggs is to boil them. But once the water has reached boiling point does it matter if the heat is turned down?

 
Freezing and melting - snow, ice and water
Freezing and melting - snow, ice and water

Duration: 00:53

An introduction to the freezing and melting of water. Melting snow and ice in a mountainous area are seen forming a stream.

 
Freezing point and boiling point
Freezing point and boiling point

Duration: 00:55

A demonstration of freezing and boiling points and standard measurements of temperature.

 
Freezing water and melting ice - global warming and rising sea levels
Freezing water and melting ice - global warming and rising sea levels

Duration: 03:48

Freezing and melting water are described within the context of global warming and rising sea levels. Why should the sea level rise when ice melts?

 
Gases in water
Gases in water

Duration: 04:53

Presenter Dr Yan fires up a pair of kettles to explain why not all gas bubbles are the same in boiling water.

 
Glass blowing
Glass blowing

Duration: 02:14

How does heat change materials? Includes footage of a glass blower working with glass.

 
Heat and insulation
Heat and insulation

Duration: 00:56

A demonstration of the use of a camera to show hot and cold areas. Includes an explanation of how people and animals use insulation to keep warm.

 
Hot air balloons powered by a toaster
Hot air balloons powered by a toaster

Duration: 01:55

Presenter Dr Yan Wong demonstrates how an ordinary toaster can be used to fly a hot air balloon.

 
How does hot water make things move?
How does hot water make things move?

Duration: 02:19

How water is converted to steam and used to make vehicles move.

 
How does sound travel through water when solids dissolve?
How does sound travel through water when solids dissolve?

Duration: 03:28

Presenter Dr Yan explains how sound travels through water when solids are dissolving into it.

 
Melting and casting metals
Melting and casting metals

Duration: 02:11

Three objects made from different metals are melted in a furnace, poured into casts and solidified again.

 
Optimum temperature for making fudge and toffee
Optimum temperature for making fudge and toffee

Duration: 01:26

A fudge and toffee maker explains how he uses a thermometer to measure the temperature of his products to ensure they are not too soft or too hard.

 
Particle theory - changes of state
Particle theory - changes of state

Duration: 02:02

A demonstration of a rapid change of state using liquid nitrogen. Introduces particle theory of a gas turning to a liquid and vice versa.

 
Soluble and insoluble materials
Soluble and insoluble materials

Duration: 01:13

An introduction to solvents and soluble and insoluble materials.

 
Tarmac
Tarmac

Duration: 00:58

The invention of tarmac by John MacAdam.

 
The behaviour of particles
The behaviour of particles

Duration: 01:08

A demonstration of the behaviour of particles as solids, liquids and gases.

 
The temperature of ice
The temperature of ice

Duration: 00:31

An investigation into the effect of ice on temperature. Three glasses contain varying amounts of ice - is the temperature the same in all three?

 
The water cycle
The water cycle

Duration: 00:52

An explanation of each stage of the water cycle.

 
Using liquids in low temperatures
Using liquids in low temperatures

Duration: 01:01

Can the temperature affect the viscosity of oil? An experiment compares standard oil with oil specifically designed to work in low temperatures.

 
Volcanoes and molten rock
Volcanoes and molten rock

Duration: 00:23

Molten rock from a volcano is seen solidifying as it cools.

 
Why does it snow?
Why does it snow?

Duration: 0:49

Britain experienced a period of heavy snowfall in February 2009, but what caused such unusual weather?

 

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.