31 January 2008

We have been wondering about glass

We have been wondering about glass.

We know that glass can be breakable.

We know that when it breaks, it goes into sharp, dangerous jagged pieces.

We know that car windows are made of glass.

We wondered what would happen if the glass in a car window broke. Would it make sharp, dangerous, jagged pieces?

This is what Per found out:

The glass in car windows is laminated so that it doesn’t break into sharp, dangerous, jagged pieces. When it breaks, the pieces are small and not sharp, so people don’t get hurt by it!

We also noticed some other special glass in the school. One of the windows had thin metal wire inside the glass. We think this might be to make the window stronger so that it would not break so easily.

What other kinds of glass can you find out about?

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