EARTH'S ROTATION AND REVOLUTION

Earth’s Rotation Rotation is the spinning of the Earth on its axis. The time for one rotation is 24 hours. The speed of rotation 24,855 miles/24 hr or 1,038 miles/hr Click image to view Earth’s rotation.

Earth’s Revolution A revolution occurs as the earth moves around the sun. Time for one revolution = 365 1/4 days = 8,766 hours The speed of earth’s revolution is about 18 miles per second.

Earth’s Revolution

The Earth’s Tilt The Earth has 4 seasons. Summer, Spring, Autumn, and Winter. These seasons are caused by Earth’s Tilt

The Earth’s axis is the imaginary line around which the Earth spins (rotates) causing the Earth to tilt toward and away from the sun during different times of the year.

The seasons depend on which side of Earth is tilted toward the sun. When the Northern Hemisphere is tilted toward the sun it is summer in the north and winter in the south and vice versa.

Summer Solstice for Northern Hemisphere Winter Solstice for Southern Hemisphere

Equinoxes During the Equinoxes the Earth is neither pointing toward or away from the Sun. During the Spring and Fall equinox the length of day versus night is equal.

Solstices The solstices are the longest and shortest days of the year. The Summer Solstice is the longest and the winter solstice is the shortest.

Northern Hemisphere During the Summer Solstice, the Earth is tilted as far toward the Sun as possible. During the Winter Solstice, the Earth is tilted as far away from the Sun as possible.

Earth’s Orbit The path an object takes as it revolves around another object.

Around and Around We Go Every second, that you sit in this classroom, the Earth's orbital motion carries you about 18 miles through space.

SPACE EARTH MOVEMENTS

Round One 1. The Earth spinning on its axis. Rotation Revolution 2. Going around a larger body. Rotation Revolution Revolution 3. 24 hours. Round One Rotation Revolution 4. Causes the Earth’s seasons. Rotation Revolution 5. Creates a year. Rotation Revolution 6. The moon going around Earth. Rotation Revolution

Identify the motion being shown in each of these pictures Identify the motion being shown in each of these pictures. Each team must write their answers for each figure in the form of a question. Figure #1 Rotation Revolution Planet Round Two Figure #2 Earth Rotation Revolution

Earth Science TEST ONE REVIEW (study power point)   Tell the story of the solar system’s formation Inner and outer planets – composition + reason for composition Comparing Asteroids / Comets / Meteoroid -> meteor -> meteorite Calculating AU for a given planet’s distance in km (or vice versa!) Star Life Cycle diagram + vocab Moon facts Moon phases – predicting and naming Draw Eclipse diagrams (lunar and solar) Tides Rotation / Revolution (it may help if you know the reasons for the seasons)