Class Clips is changing
We will be introducing the new Knowledge and Learning Beta website over the coming months. Clips for use in the classroom are now available on your phone, tablet or PC.


Alternatively, you can still browse or search by keyword or clip number on this site.

CLIP 13438

How flat glass for windows is made

How flat glass for windows is made
Play

Did you know?

All Class Clips content is available to watch on mobile, tablet and desktop devices on our new Knowledge & Learning BETA website.

Key Info
  • How flat glass for windows is made
  • Duration: 08:39
  • Two children meet Curious Cat, an animated cat who asks them if they would like to find out how glass is made. They take a trip to a glass making factory to discover how big panes of glass are made. They start off learning that glass is made from raw materials such as sand, soda ash and limestone. The different stages and processes involved in making a flat pane of glass are seen, including the float glass process, which makes the molten glass flat and smooth. This is demonstrated in a laboratory using oil and water. The children watch the raw material go in one end of the process and finish by watching the glass being cut into different sizes. First broadcast on BBC Learning Zone in March 2012 as part of the series Curious Cat's Science.
  • Subject:

    Science

       Topic:

    Changing Materials: Irreversible Change

  • Keywords: glass, glass making, panes of glass, float glass, soda ash, limestone, sand, window, furnace, heat, shape, liquid, solid, melt, cool, CuriousCatsScience, degrees Celsius, raw materials
Ideas for use in class
  • Used to learn about glass making and the materials needed for glass. Useful for learning about changes in materials and reversible and non-reversible changes as well as the application of science.
Background details
  • Clip language : English
  • Aspect ratio : 16x9

BBC navigation

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.