1. Time zones were established to help deal with the fact that day and night occurs at different times on the earth due to

rotation revolution evolution

2. Times zones are based on various degrees of

latitude longitude temperature

3. In the United States there are how many times zones?

2 4 6

4. The time in Denver is compared to New York City

Two hours ahead

Two hours behind

One hour behind

5. This is the term for the difficulty our bodies have adjusting to different time zones when doing a lot of traveling by air.

jet lag jet flu jet fever