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A text with the exercises
Question | Answer |
---|---|
They come into your house… | through the walls, ceilings and floors and they are there now. |
They are all over the world… | surrounding everything and everybody. |
Then we pick them right out of the air and… | transform them into music and voices that we can hear. |
Light and heat and radio waves are different from sound waves… | because they do not need any-thing that we can see or feel through which to travel. |
This magnetic area around an electric current… | is called a magnetic field used to generate more electricity. |
Wave … | is a single vibration of energy in motion. |