Water

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Across
  1. 2. This type of metal reacts with water and is in group one.
  2. 3. This is what people need to be always.
  3. 4. This is the name given to two or more elements chemically bonded together
  4. 5. What element does a water molecule only have one of?
  5. 6. Some oceans have a lot of this which is man-made.
Down
  1. 1. This is what we call tiny life forms.
  2. 3. What element is in the chemical formula for water twice?