Question

1) Why does the rotation of Earth require people to establish time zones?

2) What is a leap year, and what purpose does it serve?

3) What line on Earth's surface marks where the date changes?

Answer 1

1. Since the Earth rotates constantly and is exposed to the sun in different

2. a leap year is february 29th and it appears every 4 years on the gregoriancalendar. it exists to keep seasons where they are in relation to the year.
3. International Date Line IDL