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I know because when the date arrives we celebrate it

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I know because when the date arrives we celebrate it

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They can find things from when it was that old maybe

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brobably from the things on earth

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maybe because of old rocks or fossils

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4.5 billion years

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really old

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dont know

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I know how old I am because I know my year and date of birth.

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i have no idea

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like 4 billion

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you find out what year u were born, then u find out what year it is then u see how old u r and my parents told me

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you find out what year u were born, then u find out what year it is then u see how old u r and my parents told me

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because of my birthday

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Brenda-you parents help you remember when your little

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Brenda-you parents help you remember when your little

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parents tell you when you are born

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because my parents told me, and ive seen my birth certificate
lauren

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Probably from notes from millions of years ago

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They probably know from things they have found on earth.

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Around 4-5 billion years old.

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4.6 billon

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I think they study the weathering of the earths crust.

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Probably more than 5 billion years old

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They know because of the things they find over the years and how it dates back to different time periods.

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at least 4 billion years old

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12 ye

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Your parents tell you when you are very young and you remember your age as you get older.

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You can tell by having a birth certificate.

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You keep track of how many years you've lived with sentience, and trust others to know how much you've aged before that.

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I was infant and I was born in JANUARY 27 2007 MY  DADDY 

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I was infant and I was born in JANUARY 27 2007 MY  DADDY 

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You know how old you are by counting the amount of times the earth goes around the sun.

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Over a million years ago.

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by counting how many years has pasted since i was born

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by counting how many years has pasted since i was born

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i just remember how old i was and jus

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The way you can tell how old you are is by the year, month, day and time that you were born. Or events that have happened that you remember

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How long ago I was born

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Because my birthday and how many years I been on this earth