8.7A Rotation & Revolution

Front

What is Earth's rotation?

Back

Earth's rotation is the spinning of the Earth on its axis, which takes approximately 24 hours to complete, resulting in day and night.

Front

What is Earth's revolution?

Back

Earth's revolution is the movement of the Earth around the Sun, which takes about 365 days to complete, leading to the changing seasons.

Front

What causes day and night?

Back

Day and night are caused by Earth's rotation on its axis; when one side of the Earth faces the Sun, it experiences daytime, while the opposite side experiences nighttime.

Front

What is the equator?

Back

The equator is an imaginary line that divides the Earth into the Northern and Southern Hemispheres, located equidistant from the poles.

Front

Why do cities near the equator experience less variation in day length?

Back

Cities near the equator experience less variation in day length because they receive consistent sunlight throughout the year due to the Earth's tilt and rotation.

Front

What are the poles?

Back

The poles are the points on the Earth's surface that are farthest north and south, known as the North Pole and South Pole, where extreme variations in daylight occur.

Front

What is the tilt of the Earth's axis?

Back

The tilt of the Earth's axis is approximately 23.5 degrees, which affects the intensity and duration of sunlight received at different latitudes, causing seasons.

Front

What are the four seasons?

Back

The four seasons are spring, summer, autumn (fall), and winter, which result from the tilt of the Earth's axis and its revolution around the Sun.

Front

What is a shadow?

Back

A shadow is a dark area or shape produced by an object blocking light, which changes in length and direction as the Earth rotates.

Front

What is the significance of the Tropic of Cancer and Tropic of Capricorn?

Back

The Tropic of Cancer and Tropic of Capricorn are the latitudes where the Sun is directly overhead at noon during the summer solstices, marking the boundaries of the tropics.