Light and Sound

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Across
  1. 1. Opposite of soft (4 letters)
  2. 4. Something you can switch on to see in the dark (5 letters)
  3. 5. Something we hear with our ears (5 letters)
  4. 6. Sound is caused by ....
Down
  1. 1. Opposite of dark (5 letters)
  2. 2. Opposite of light (4 letters)
  3. 3. This reflects the light from the sun
  4. 5. A star that gives us heat and light (3 letters)
  5. 7. what you see when something blocks the light (6 letters)