Gap Fill - Level 4

HOW TO PLAY:

  • Choose the correct word from the drop-down menus below.
  • Click the button at the bottom to check your answers.
  • Press the "refresh" button on your browser to play again.

   areas      biodegradable      blocks      chemicals      cold      colour      creative      different      how      pieces      potentially      process      protecting      researcher      small      stages      stronger      things      transparent      windows  
Scientists have found a new use for wood. They have made it . This could change we use and make many . See-through wood could replace glass in , iPhone screens and many other of building. Researchers experimented with ways to remove the from wood. They were surprised at how transparent it became. One said the discovery could, " replace glass".

The researchers boiled small of wood in water and for two hours. The wood lost its colour during this and it became transparent. The see-through wood is than glass. It is better at against the . It is also . Research is still in its early . Researchers have only used blocks of wood so far. They will now start testing on bigger of wood.

Try the Level 5 gap fill.

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