World on a Window Sill, Part 2

World on a Window Sill, Part 2

World on a Window Sill, Part 2
Reading Level

	edHelper's suggested reading level:	grades 4 to 5
	Flesch-Kincaid grade level:	4.98

Vocabulary

	challenging words:		coordinates, therefore, directly, based, estimate, hometown, sphere, latitude, atlases, absolute, grid, intersect, lines, parallel, vertical, board
	content words:		Window Sill, North Pole, South Pole, Arctic Ocean, South Poles, Prime Meridian, National Geographic Society, United States

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World on a Window Sill, Part 2
By Trista L. Pollard

¹     When you read World on a Window Sill, Part 1, you learned about globes and atlases. Now you will learn more about latitude and longitude. Why are they so important, you ask? Well, latitude and longitude form a grid system. A grid system is a group of horizontal (east to west) and vertical (north to south) lines. These lines intersect or cross at coordinates. Coordinates are the points where the lines meet. Latitude and longitude help you to locate places on maps and globes. Remember, you won't see these lines on Earth. They are imaginary lines.

²     We need to return to the globe. As a three-dimensional model, it is shaped like a sphere. Therefore, any way you travel around the Earth, you will be going in a circle. A circle has 360 degrees (360º). That is why a globe has 360º. Using the Equator as our starting point, we can figure out the degrees of our poles.

³     The North Pole and South Pole are at either end of the Earth's axis. The axis is the imaginary line that runs through the center of the Earth. The North Pole is the northern end of the Earth's axis. It is located in the Arctic. It is also surrounded by the Arctic Ocean. There is an imaginary line that is drawn around the North Pole. The Arctic circle is parallel to the Equator. It is also about 66 degrees north of the Equator. The South Pole is at the southern end of the Earth's axis. It is located in Antarctica.

Paragraphs 4 to 9:
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