What is the equator?
The equator is the line around the middle of the Earth. It divides the Earth into northern and southern hemisphere.
What are the lines of latitude?
Lines of latitude go around Earth. They show us the distance from the equator.
In which time zone does Vietnam lie?*
Vietnam lies in the GMT+7. It means Vietnam is 7 hours ahead compared to the Greenwich meridian.
How many time zones are there in the USA?
The USA is a large country. There are six time zones in the USA.
What is the Greenwich Meridian?
The Greenwich Meridian (or Prime Meridian) is a very important line of longitude which passes through London in the UK.
Is it earlier or later if you live to the west of the Greenwich Meridian?
If you live to the west of the Greenwich Meridian it’s earlier than in London.
Is Vietnam to the west or to the east of the Greenwich Meridian?*
Vietnam is to the east of the Greenwich Meridian.
Is it earlier or later if you live to the east of the Greenwich Meridian?
If you live to the east of the Greenwich Meridian it’s later than in London.
Why are there different times on different sides of the Earth or even within one country?
It’s because the world has different time zones.
How many time zones are there in Vietnam?*
There is only one time zone in Vietnam.
What are the lines of longitude?
Lines of longitude go up and down, dividing Earth like pieces of an orange.
How many time zones are there within the same country?
Most countries have one time zone, but some large countries can have more than one, two, three or even more time zones.
Is the time in Vietnam earlier or later than in London, in the UK?*
In Vietnam it’s later than in London, in the UK.