General Knowledge Puzzle

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Across
  1. 2. What is the name of the first element on the periodic table of elements?
  2. 4. What is the name of the largest rain forest in the world?
  3. 6. What do you call a type of shape that has five sides?
  4. 8. What is the name of the world's largest bird?
Down
  1. 1. How many colours are there in a rainbow?
  2. 3. Which is the hardest naturally occurring substance on earth?
  3. 4. Which is the largest continent in the world?
  4. 5. What do you call an animal which can live in water and on land?
  5. 6. In which city is the Eiffel Tower?
  6. 7. What color symbolizes peace?