The Equator, North Pole, and South Pole: Second Grade Social Studies

The Equator, North Pole, South Pole, and hemispheres are imaginary lines and markers used to divide and navigate planet Earth.

Imaginary Lines on Our Planet

When you look at a globe, you see lines drawn across the land and oceans. If you traveled to those locations in real life, you would not see painted lines on the ground or floating ropes in the water! These lines are imaginary tools created by geographers to help us describe locations, measure distances, and understand climate zones.

                         [ North Pole ] (90° N)
                               |
                   .-----------+-----------.
                 /     Northern Hemisphere                  +===============================+  EQUATOR (0°)
                 \     Southern Hemisphere   /
                   '-----------+-----------'
                               |
                         [ South Pole ] (90° S)

The Poles: Earth's Two Extremes

Earth spins around an imaginary rod passing straight through its center called its axis. The two points where this axis meets the surface are the North Pole and the South Pole.

The North Pole

The North Pole is the northernmost point on planet Earth. It sits at the top of the globe in the middle of the Arctic Ocean. At the North Pole, every direction you turn faces directly South! There is no land at the North Pole, only sheets of floating sea ice. Temperatures remain freezing throughout most of the year.

The South Pole

The South Pole is the southernmost point on Earth, located at the exact bottom of the globe. Unlike the North Pole, the South Pole sits on thick ice resting on top of solid land on the continent of Antarctica. It is the coldest, windiest place on Earth, where the ground is covered by thousands of feet of compressed glacial ice.

The Equator: Earth's Middle Belt

The Equator is an imaginary line drawn horizontally around the exact middle of the Earth, halfway between the North Pole and the South Pole.

+-------------------------------------------------------------+
|                     THE EQUATOR AT A GLANCE                 |
|                                                             |
|   Location: Exactly 0 degrees latitude                      |
|   Function: Divides Earth into Northern & Southern halves   |
|   Climate:  Direct sunlight year-round; warm & tropical     |
+-------------------------------------------------------------+

Climate Along the Equator

Because Earth is round, the Equator receives the most direct, intense sunlight throughout the entire year. As a result, regions near the Equator do not experience cold snowy winters. Instead, equatorial climates are warm, humid, and tropical, supporting lush rainforests like the Amazon in South America and the Congo in Africa.

Distance from the Equator and Temperature

As a general rule, the closer a place is to the Equator, the warmer its climate tends to be. The farther you travel away from the Equator—toward either the North Pole or the South Pole—the colder the weather becomes.

Dividing Earth into Hemispheres

The word hemisphere comes from hemi, meaning half, and sphere, meaning a round ball. A hemisphere is exactly half of the Earth.

+-----------------------+-------------------------------------+
| HEMISPHERE            | BOUNDARY LINE & DESCRIPTION         |
+-----------------------+-------------------------------------+
| Northern Hemisphere   | North of Equator; contains North    |
|                       | America, Europe, Asia, part Africa  |
| Southern Hemisphere   | South of Equator; contains Australia|
|                       | Antarctica, most of South America   |
| Eastern Hemisphere    | East of Prime Meridian; Europe,     |
|                       | Africa, Asia, Australia             |
| Western Hemisphere    | West of Prime Meridian; includes    |
|                       | all of North and South America      |
+-----------------------+-------------------------------------+

Northern and Southern Hemispheres

The Equator splits Earth into the Northern Hemisphere and the Southern Hemisphere. When it is summer in the Northern Hemisphere, it is winter in the Southern Hemisphere because of the tilt of the Earth toward or away from the sun. The United States is located entirely in the Northern Hemisphere.

Eastern and Western Hemispheres

Geographers also divide the globe vertically using another imaginary line called the Prime Meridian. The Prime Meridian splits Earth into the Eastern Hemisphere and the Western Hemisphere. North and South America lie in the Western Hemisphere, while Europe, Africa, Asia, and Australia lie primarily in the Eastern Hemisphere.

Exercises and Review

Exercise 1: Define what the Equator is and explain how a region's distance from the Equator affects its general temperature.

Exercise 1 Solution: The Equator is an imaginary line drawn horizontally around the middle of the Earth, halfway between the North Pole and the South Pole at zero degrees latitude. A region's distance from the Equator affects its temperature because the Equator receives the most direct sunlight all year, making areas near it warm and tropical. As you travel farther away from the Equator toward the North or South Pole, the sunlight hits at a slant, causing temperatures to become much cooler and colder.

Exercise 2: Explain the meaning of the word hemisphere and name the two hemispheres in which North America is located.

Exercise 2 Solution: The word hemisphere means half of a round sphere or half of the Earth. North America is located in the Northern Hemisphere, because it sits north of the Equator, and in the Western Hemisphere, because it sits west of the Prime Meridian.