Unit 7 - Lessons 1-2 Vocabulary Flashcard

Front

When does the Northern Hemisphere tilt toward the sun?

Back

Summer

Front

What is a planet?

Back

A celestial body that orbits a star, is large enough to be rounded by its own gravity, and has cleared the area of its orbit.

Front

How many degrees is Earth's axis tilted from the vertical?

Back

23.5 degrees

Front

What is a calendar?

Back

A system of organizing time into months, weeks, and days.

Front

In which direction does Earth rotate?

Back

West to east.

Front

What causes the seasons on Earth?

Back

The tilt of Earth's axis and its orbit around the sun.

Front

What is the significance of the equator?

Back

It is an imaginary line that divides the Earth into the Northern and Southern Hemispheres.

Front

What is the difference between rotation and revolution?

Back

Rotation is the spinning of Earth on its axis, while revolution is the movement of Earth around the sun.

Front

What is a solstice?

Back

A solstice is an event that occurs when the sun reaches its highest or lowest point in the sky at noon, marking the longest and shortest days of the year.

Front

What is an equinox?

Back

An equinox is an event that occurs when day and night are of approximately equal length, occurring in spring and fall.