THURSDAY 21ST

NATURAL
Thursday 14th answers (Page 73)
EX 1.
In homes, in cars, on roads, in magic tricks, dentist´s mirror, etc.
EX 2.
In microscopes, telescopes, glasses, binoculars, cameras, etc.

Today we are going to learn about REFRACTION
Refraction occurs when light changes direction passing from one subtance to another.
As you can see in this picture the light passes through the air and through the water and changes direction. The staw appears to bend. 
Why does this effect happen? Because the water and the air have different densities.

Now watch this video to understand how refraction is produced:

And watch this video about a refraction experiment:

Now read the information about refraction in your book on page 72. 
You can also try to prove refraction at home doing the experiment above ↑ and placing a pencil in a glass of water to see how it bends.

Os animo a que en casa probéis a hacer el experimento que aparece en el vídeo sobre el cambio de dirección de las flechas y que introduzcáis una pajita o un lápiz en un vaso con agua para poder observar cómo se produce la refracción. Si alguno quiere comentar cómo ha salido su experimento puede ponerlo debajo en los comentarios.