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Published byAmia Ramirez
Modified over 7 years ago
Motions and Their EffectsSeasonal Change and Planetary Movement
Seasons The tilt of the Earth’s axis is 23.5 degrees This tilt causes seasonal changes
Winter Solstice December 21 or 22 North Pole in darkness for 24 hours South Pole has continual daylight Sun is at its lowest point
Why do we have winter? Fewer hours of sunlight during the day North pole is tilted away from the sun Light rays are less direct
Vernal Equinox (equal)March 20 or 21 (Spring) Sun is directly over the equator Every part of the Earth experiences equal hours of day and night
Summer Solstice June 20 or 21 South Pole in Darkness North Pole in Light Sun appears at its highest point
Why we have summer? Daylight hours are longer Sunlight is more direct
Autumnal Equinox (equal)September 22 or 23 (Fall) Equal hours of day and night Sun is directly over the equator
Questions How many months apart are the solstices and the equinoxes? How is the vernal equinox similar to the autumnal equinox?
Questions What are the differences between the summer and the winter solstices? Why do we have changes in seasons during the year?
Kepler Each planet moves in an elliptical orbit (stretched out circle) Planets speed up their orbit as they approach the Sun and slow down as they move away from it
Questions What was Kepler’s contribution to the understanding of planetary movement? TRANSPARENCIES
The Tilt of Earth Terms Earth’s tilt 23.5°
Do Now In your notebook, answer the following question in complete sentences: What causes the seasons?
Why do we have seasons?. Earths rotation The Earth rotates on its axis (imaginary vertical line around which Earth spins) every 23 hours & 56 minutes.The.
Season Vocabulary Seasons – A pattern of temperature changes & other weather trends over a year.
What’s The Reason For The Seasons?
Earth in Space.
Earth In Space.
Chapter 19, Section 1 Earth in Space
Earth’s Days, Years, and Seasons
SEASONS V. Cruz.
Reasons for Seasons.
What do you already know? The sun has the following effects on earth:
MOTION. ASTRONOMY The study of objects in space, including the moon, stars, and planets. Solar system Composed of the sun and the planets which travel.
Earth’s Tilt and Rotation
Today’s Agenda… Bellringer: Identify each as rotation or revolution (this is not multiple choice) A. Takes 24 hours B. Spins on Axis C. Takes 365 ¼ days.
The Earth’s Revolution
The Earth and its Motions
Chapter 1, Section 1. Earth moves in two ways: Rotation Revolution.
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