General knowledge

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Across
  1. 3. The country known as the "Land of Kangaroos" (9 letters)
  2. 4. The capital of Japan (5 letters)
  3. 5. The longest river in the world (4 letters)
  4. 7. The closest planet to the Sun (7 letters)
  5. 8. The national flower of India (5 letters)
Down
  1. 1. The largest ocean in the world (7 letters)
  2. 2. The hardest natural substance on Earth (7 letters)
  3. 6. The tallest mountain in the world (8 letters)