What is the colored part of the human eye called? - Iris, What did Newton discover? - Law of Gravity, What is the largest known land animal? - Elephant, Which dinosaur could fly? - Pterodactyl, How many chromosomes does the average human have? - 46, How many bones are there in the Human body? - 206, What is used in pencils? - Graphite, What gas is usually filled in the electric bulb? - Nitrogen, What is the hardest substance available on earth? - Diamonds, What is the nearest planet to the sun? - Mercury,

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