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Last updated at 14:13 GMT, Thursday, 14 January 2010

Larks and owls

A girl sleeping

Are you a morning or an evening person?

Do you naturally wake up early or go to bed late? You might be biologically aligned to a different time zone. This week Dan and Kate discuss sleeping patterns and why some people are naturally early risers – larks – and some people are much better late at night – owls.

This week's question:

On average, how many hours do adults sleep each night?

a) six and a half hours
b) seven and a half hours
c) eight and a half hours

Listen out for the answer in the programme!

Listen to the programme

Larks and owls

Vocabulary from the programme


a famously early-rising bird. People who wake up early in the morning are sometimes known as 'larks'


a type of bird that tends to come out at night. People who stay up late are sometimes known as 'owls' or 'night-owls'

body clock

a person's natural rhythm of sleep


when the sun rises


when the sun goes down


located inside


located outside

jet lag

the tiredness you feel after you've been on a flight


happening at the same rate or speed

out of sync

happening at the wrong pace

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