Read again and choose the correct word. Listen and check. Go outside on a sunny day and look 1) at/on your shadow¹! Early 2) in/at the morning and late in the afternoon, it is long. At lunchtime, it 3) has/is very short. This is because the Earth spins every 24 hrs and the sun is in a different place 4) in/on the sky at different times of the day. Sundials use shadows to tell the time. They 5) have/are the oldest way to tell the time!