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The Earth and its MotionsScience 8 Astronomy Notes Page 6
The Earth and its MotionsThe Earth rotates or spins on its axis The rotation time is 24 hours or 1 day
The Earth and its MotionsThe Earth revolves or travels around the sun The revolution time is 365 ¼ days or 1 year Ever wonder what leap year is or why is there are 29 days this month? Click here…
The Earth and its MotionsThe Earth does not stand straight up on its axis The Earth is tilted at an angle of ½° on its axis. Why is 23 ½° North or South of the Equator significant?
Putting it all together…What causes day and night? The Earth’s rotation and its spherical shape causes half of the Earth to face the sun (day) and half to face away (night). DAY NIGHT
Putting it all together…What causes seasons? The Earth’s revolution and its tilt on its axis causes the sun to hit certain parts of the Earth more directly (summer) and parts less directly (winter).
The Winter Solstice Is the 1st day of winter Minimum hours of daylightHappens around December 21st (in the Northern Hemisphere) Most direct rays hit south of the Equator (at 23 ½° S)
The Summer Solstice Is the 1st day of summer Maximum hours of daylightHappens around June 21st (in the Northern Hemisphere) Most direct rays hit north of the equator (at 23 ½ °N)
The Vernal Equinox Is the 1st day of springEqual hours of daylight and darkness Happens around March 21st (in the Northern Hemisphere)
The Autumnal Equinox Is the 1st day of autumn (fall)Equal hours of daylight and darkness Happens around September 21st (in the Northern Hemisphere)
Motions and Their Effects
Season Vocabulary Seasons – A pattern of temperature changes & other weather trends over a year.
Chapter 19, Section 1 Earth in Space
Earth’s Days, Years, and Seasons
LEARNING GOALS Investigation 3- Seasons and Sun
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
Chapter 1, Section 1. Earth moves in two ways: Rotation Revolution.
Choose a category. You will be given the answer. You must give the correct question. Click to begin.
Unit 3 Lesson 1 Earth’s Days, Years, and Seasons Copyright © Houghton Mifflin Harcourt Publishing Company.
Astronomy The study of the moon, stars, and other objects in space Study the movements of the sun, and moon as they appear to travel across the sky Will.
Earth orbits the sun on a tilted axis. Different hemispheres face the sun at different times. At any time during the summer or winter, one part of the.
Earth-Moon-Sun Cycles. Cycle # 1 Day and Night Day Night Day Night.
Astronomy Rotation and Revolution They’re like “Night and Day”
24.2 Sun and Seasons
Seasons. What Causes Seasons? Seasons are caused by the tilt of the earth’s axis as it moves around the sun. Seasons happen because the Earth is tilted.
Earth in Space Section 1-1 P
Earth’s Seasons. Rotation 1.The imaginary line that passes through Earth’s center and the North and South poles is called Earth’s axis. 2.Earth spinning.
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