If a place is on the Equator, which hemisphere is it in?

If a place is directly on the Equator, it is still considered part of both the Northern Hemisphere and the Southern Hemisphere — it marks the boundary between them. However, it is still in either the Eastern or Western Hemisphere depending on where it sits relative to the Prime Meridian. For example, the Equator passes through parts of Ecuador, and Ecuador is in both the Northern and Southern hemispheres but is in the Western Hemisphere.

Why was Greenwich, England chosen for the Prime Meridian?

Greenwich was chosen by international agreement in 1884 because Britain was a major naval and world power at that time, and many ships used British navigational charts. Rather than having different countries use different prime meridians, representatives from many nations decided to use one standard location so all geographers and navigators would be using the same reference line. This helped with international communication, trade, and exploration.

Can a place be in more than two hemispheres?

No. Every place on Earth is in exactly two hemispheres — one based on the Equator (either Northern or Southern) and one based on the Prime Meridian (either Eastern or Western). A place can be very close to both lines, or even straddle both lines (like parts of Egypt or Indonesia), but it will always fall into exactly two of the four hemispheres.

How are hemispheres different from continents?

Hemispheres are halves of Earth created by dividing lines (the Equator and Prime Meridian). Continents are large landmasses that have their own natural and cultural boundaries. A continent can be in multiple hemispheres — for example, Africa is in both the Northern and Southern hemispheres and in both the Eastern and Western hemispheres. Understanding both hemispheres and continents gives you different ways to organize and describe locations on Earth.

M6GEO-2.4

Hemispheres, the Equator & the Prime Meridian

Learn to locate the Equator and Prime Meridian, identify the four hemispheres, and determine which hemispheres contain any place on Earth.

What you'll do in this lesson

A voice-first session with the Crimsora tutor on Hemispheres, the Equator & the Prime Meridian, then targeted practice and FRQs — with the tutor adapting to where you get stuck.

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What this lesson covers

Every location on Earth belongs to one or more of the four hemispheres — the largest divisions geographers use to organize our planet. Understanding hemispheres, the Equator, and the Prime Meridian is like learning the basic grid that geographers use to describe where things are. These imaginary lines divide Earth into halves, and together they help you pinpoint any place in the world using a coordinate system you'll build on in later lessons.

What Is the Equator?

The Equator is an imaginary line that runs around Earth's middle, halfway between the North Pole and the South Pole. It divides Earth into two equal hemispheres: the Northern Hemisphere (the half containing the North Pole) and the Southern Hemisphere (the half containing the South Pole). You can see the Equator marked on most globes and maps. It serves as the starting point for measuring how far north or south any place lies. The Equator is also special because it receives the most direct sunlight year-round, making tropical regions near it warm and humid. Locations on the Equator itself experience roughly 12 hours of daylight and 12 hours of darkness every day of the year.

What Is the Prime Meridian?

The Prime Meridian is an imaginary line that runs from the North Pole to the South Pole, dividing Earth into two more hemispheres: the Eastern Hemisphere and the Western Hemisphere. This line was chosen as the zero-degree reference line by international agreement in 1884 — it runs through Greenwich, England. The Prime Meridian is the starting point for measuring how far east or west any place lies. It might seem strange that one place in England was chosen as a global standard, but this decision was made by representatives from many countries so that all geographers would use the same reference line. You can find the Prime Meridian on most world maps and globes running vertically (up and down) through Europe and Africa.

The Four Hemispheres

Together, the Equator and the Prime Meridian create four hemispheres. Every place on Earth falls into at least two hemispheres — one based on the Equator (north or south) and one based on the Prime Meridian (east or west). The Northern Hemisphere contains North America, Europe, and most of Asia. The Southern Hemisphere contains South America, Australia, and most of Africa. The Eastern Hemisphere contains Europe, Africa, Asia, and Australia. The Western Hemisphere contains North America and South America. Many places sit on or very near these lines. For example, Nigeria is in both the Northern Hemisphere and the Eastern Hemisphere. Brazil is in both the Southern Hemisphere and the Western Hemisphere. Understanding which hemispheres a location occupies helps geographers organize information about climate, culture, and development patterns around the world.

Using Hemispheres to Locate Places

When someone asks you which hemispheres a place is in, you need to check two things: first, is it north or south of the Equator, and second, is it east or west of the Prime Meridian. Start by looking at the Equator on your map or globe. If the place is above the Equator, it's in the Northern Hemisphere; if it's below, it's in the Southern Hemisphere. Then look at the Prime Meridian running vertically down the middle. If the place is to the right (toward Asia), it's in the Eastern Hemisphere; if it's to the left (toward the Americas), it's in the Western Hemisphere. Practice this with familiar places: your own country, your favorite continent, or places you've learned about. The more you practice, the faster you'll be able to answer questions about hemispheric location. This skill forms the foundation for learning latitude and longitude in future lessons.

Common Mistakes to Avoid

Many students confuse the direction of the Prime Meridian or forget to check both lines. Remember that the Prime Meridian runs vertically (top to bottom), not horizontally like the Equator. Also, don't assume that being in the Eastern Hemisphere means a place is in the east part of the world — Australia is in the Eastern Hemisphere but is far to the east. Another common mistake is forgetting that places can be in two hemispheres at once. For instance, Egypt straddles the Prime Meridian, so parts of it are in the Eastern Hemisphere and parts are in the Western Hemisphere. Always use your map carefully and identify both lines before deciding. If you practice with a globe that clearly marks these lines, you'll avoid these errors and build your mental map of Earth much faster.

Key terms

Equator.: An imaginary line running around Earth's middle, halfway between the North Pole and the South Pole, dividing Earth into the Northern and Southern hemispheres.
Prime Meridian.: An imaginary line running from the North Pole to the South Pole through Greenwich, England, dividing Earth into the Eastern and Western hemispheres.
Northern Hemisphere.: The half of Earth north of the Equator, containing North America, Europe, and most of Asia.
Southern Hemisphere.: The half of Earth south of the Equator, containing South America, Australia, and most of Africa.
Eastern Hemisphere.: The half of Earth east of the Prime Meridian, containing Europe, Africa, Asia, and Australia.
Western Hemisphere.: The half of Earth west of the Prime Meridian, containing North America and South America.
Hemisphere.: One half of Earth created by an imaginary dividing line; every location on Earth exists in two hemispheres.

Worked example

Identify which two hemispheres contain India. Use a world map or globe to support your answer.

Start by locating India on your map or globe. First, check where India sits relative to the Equator. Look at the Equator running horizontally around Earth's middle. India is located north of the Equator, so it is in the Northern Hemisphere. Next, check where India sits relative to the Prime Meridian, the vertical line running through Greenwich, England. India is located to the right (or east) of the Prime Meridian, so it is in the Eastern Hemisphere. Therefore, India is located in both the Northern Hemisphere and the Eastern Hemisphere. You can verify this by noting that India is in Asia, which is part of both of these hemispheres.

Practice questions

Which two hemispheres contain South Africa?

Northern Hemisphere and Eastern Hemisphere
Southern Hemisphere and Eastern Hemisphere
Southern Hemisphere and Western Hemisphere
Northern Hemisphere and Western Hemisphere

Answer: Southern Hemisphere and Eastern Hemisphere

South Africa lies south of the Equator, placing it in the Southern Hemisphere. It also lies east of the Prime Meridian, placing it in the Eastern Hemisphere. A common mistake is to assume that because Africa is on the left side of many map projections, it must be in the Western Hemisphere — but remember that the Prime Meridian divides it, and South Africa is on the eastern side of that line.

Describe which two hemispheres contain your location (or the location of your school). Explain how you used the Equator and Prime Meridian to determine your answer.

Answer: Answers will vary based on student location. For example: My school is in Austin, Texas, which is in the United States. The United States is north of the Equator, so it is in the Northern Hemisphere. The United States is west of the Prime Meridian, so it is in the Western Hemisphere. Therefore, my school is in the Northern Hemisphere and the Western Hemisphere.

This question asks students to apply the skill to their own location. The correct approach is to locate the place on a map, check its position relative to the Equator first (north or south), then check its position relative to the Prime Meridian (east or west). Accepting answers from any location on Earth, as long as the reasoning correctly uses both the Equator and the Prime Meridian, demonstrates mastery of the concept.

A city is located in the Southern Hemisphere and the Eastern Hemisphere. Which of these continents could it be on?

Australia or South America
Australia or Africa
South America or Europe
Africa or North America

Answer: Australia or Africa

To be in the Southern Hemisphere, a place must be south of the Equator. To be in the Eastern Hemisphere, a place must be east of the Prime Meridian. Australia is entirely south of the Equator and east of the Prime Meridian. Africa straddles the Equator but its southern portion is south of the Equator and mostly east of the Prime Meridian. South America is in the Southern Hemisphere but is in the Western Hemisphere, not the Eastern Hemisphere. Europe and North America are in the Northern Hemisphere. Therefore, the correct answer is Australia or Africa.

FAQ

If a place is on the Equator, which hemisphere is it in?: If a place is directly on the Equator, it is still considered part of both the Northern Hemisphere and the Southern Hemisphere — it marks the boundary between them. However, it is still in either the Eastern or Western Hemisphere depending on where it sits relative to the Prime Meridian. For example, the Equator passes through parts of Ecuador, and Ecuador is in both the Northern and Southern hemispheres but is in the Western Hemisphere.
Why was Greenwich, England chosen for the Prime Meridian?: Greenwich was chosen by international agreement in 1884 because Britain was a major naval and world power at that time, and many ships used British navigational charts. Rather than having different countries use different prime meridians, representatives from many nations decided to use one standard location so all geographers and navigators would be using the same reference line. This helped with international communication, trade, and exploration.
Can a place be in more than two hemispheres?: No. Every place on Earth is in exactly two hemispheres — one based on the Equator (either Northern or Southern) and one based on the Prime Meridian (either Eastern or Western). A place can be very close to both lines, or even straddle both lines (like parts of Egypt or Indonesia), but it will always fall into exactly two of the four hemispheres.
How are hemispheres different from continents?: Hemispheres are halves of Earth created by dividing lines (the Equator and Prime Meridian). Continents are large landmasses that have their own natural and cultural boundaries. A continent can be in multiple hemispheres — for example, Africa is in both the Northern and Southern hemispheres and in both the Eastern and Western hemispheres. Understanding both hemispheres and continents gives you different ways to organize and describe locations on Earth.

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