Page 17 - Exercise 1

Page 17 - Exercise 1

1 - What is a day?

The Earth turns. It takes one day to turn one. We divide the day into twenty-four hours. Each hour has sixty minutes and each minute has sixty seconds.

2 - What is a year?

The Earth is also goes round the Sun. It takes 365 days to go round once. We call this a year. In fact, it takes 365 1/4 days, so every four years we add and extra day. We always add it to February because it’s a short month. In a leap year February has twenty-nine days. So if your birthday is 29 February, you only have a birthday every four years!

3 - What is a month?

The Moon goes round the Earth. It takes about thirty days to go round once (this is called a lunar month). So it goes round about twelve times in one year, and that’s why we have twelve months in a year. However, 12 x 30 is only 360. So we add an extra day to some months, so that we have twelve months in one year. (Nobody knows why February has only got twenty-eight days.)