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Motions and Their Effects Seasonal Change and Planetary Movement
Seasons u The tilt of the Earths axis is 23.5 degrees u This tilt causes seasonal changes
Winter Solstice u December 21 or 22 u North Pole in darkness for 24 hours u South Pole has continual daylight u Sun is at its lowest point
Why do we have winter? u Fewer hours of sunlight during the day u North pole is tilted away from the sun u Light rays are less direct
Vernal Equinox (equal) u March 20 or 21 (Spring) u Sun is directly over the equator u Every part of the Earth experiences equal hours of day and night
Summer Solstice u June 20 or 21 u South Pole in Darkness u North Pole in Light u Sun appears at its highest point
Why we have summer? u Daylight hours are longer u Sunlight is more direct
Autumnal Equinox (equal) u September 22 or 23 (Fall) u Equal hours of day and night u Sun is directly over the equator
Questions u How many months apart are the solstices and the equinoxes? u How is the vernal equinox similar to the autumnal equinox?
Questions u What are the differences between the summer and the winter solstices? u Why do we have changes in seasons during the year?
Kepler u Each planet moves in an elliptical orbit (stretched out circle) u Planets speed up their orbit as they approach the Sun and slow down as they move away from it
Questions u What was Keplers contribution to the understanding of planetary movement? u TRANSPARENCIES
Do Now In your notebook, answer the following question in complete sentences: What causes the seasons?
The Tilt of Earth Terms Earths tilt23.5° summer solsticeautumnal equinox –(June 21st)(Sept. 22nd) winter solsticevernal equinox –(Dec. 21st)(March 21st)
Chapter 1 Section 1 Earth in Space. What causes day and night? Earth’s rotation on its axis causes day and night.
What’s The Reason For The Seasons? Shortest amount of daylight Equal amounts of daylight Longest amount of daylight SPRING SEASON SUMMER SEASON FALL SEASON.
Key Concepts How does Earth move in space? What causes the cycle of seasons on Earth?
What are the 4 seasons? And when do they start? Spring – March 21 st Summer – June 21 st Autumn/Fall – September 21 st (Or Sept. 22) Winter – December.
Revolution and Rotation Revolution – object’s path as it orbits another body in space –E–Earth’s revolution is 365 1/4 days (leap year) Rotation – spin.
As Earth Rotates: The Effects of the Rotation of the Earth.
Insolation Insolation = Incoming Solar Radiation Energy in = Energy out or, Insolation In = Heat Out (Earth only emits heat)
WHY DO WE HAVE SEASONS? OBJECTIVE: To infer the cause of the seasons.
Earth in Space 19-1 Astronomy is the study of objects beyond the Earths atmosphere. It is one of the oldest sciences, as ancient people studied the heavens.
The Tilt in the Earths Axis. north pole The earths axis is tilted. This diagram shows the tilt in January south pole The north pole is tilted away from.
Climate and weather are NOT the same Weather – the condition of the atmosphere in one place during a limited period of time Climate – the weather patterns.
The Earth in Space. Day and Night The Earth is a sphere (actually, it’s an oblate spheroid – a very slight rugby ball shape) The Earth orbits the Sun.
CHAPTER 17 EARTHS CYCLES. Lesson 1 – How does Earth move? Earth spins like a top as it circles around and around the Sun. Earth is tipped to one side.
IMPACT CRATER Bowl-shaped depressions on the surface of the Moon that are formed by meteor and comets crashing into the Moon.
Topic IV: Motions of the Earth, Moon and Sun. Learning Objectives EARTH’S MOTIONS: Explain and demonstrate the difference between rotation and revolution.
Long ago, in a galaxy far, far away…. Actually, the galaxy isnt that far away. In fact, we live in it. Its called the Milky Way. The Milky Way is a spiral.
Chapter: Earths Place in Space Table of Contents Section 3: Earth and the Solar SystemEarth and the Solar System Section 1: Earths Motion and Seasons.
Earth-Sun-Moon Seasons Solar System Stars Laws and.
Seasons. Season animation /seasons.html /seasons.html.
Describe the greenhouse effect. Why is the equator hotter? Why do we have seasons? By Meghan Burton Period 3 June 12, 2006.
Practice Questions What motion of Earth causes day and night? Rotation What causes seasons to change? Earths revolution changes how energy from the Sun.
What is Weather? Weather is the condition of the bottom layer of earths atmosphere in one place over a short period of time. Trivia Question: (Fill in.
Planet Earth Part One: The Measurement of Time. The planet we live on is called Earth.
Start quiz Click the yellow button below for your first word. Then, select an answer and see if you are correct. Quiz Yourself: Lessons 5-8 Created by.
March Equinox March Equinox (around March 21. Noon sun is directly over head on the equator. Days and night are both 12 hrs long (except at the poles).
Understanding Earth Review. Rotation (rotates) – spinning on the axis (turns) What does rotation give Earth and how long does it take to rotate? The concept.
Copyright © 2011 InteractiveScienceLessons.com handout.
The Earth and the Moon. I) Formation of the Moon A giant Asteroid (the size of Mars) slammed into Earth about 4.5 billion years ago kicking up debris.
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