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1 Spring Equinox 2 March 20 or 21 3 Equal amount of daylight & night time hours 4 ~ 12 hours of daylight and night time
Spring Daylight hours increasing
1 Summer Solstice 2 June 20 or 21 3 Longest amount of daylight hours 4 ~ 14 hours of daylight
Summer Daylight hours decreasing
1 Fall Equinox 2 September 21 or 22 3equal amount of daylight and night time hours 4 ~ 12 hours of daylight and night time hours
12341234 12341234 Fall Daylight hours decreasing
1 Winter Solstice 2 Dec 20 or 21 3 shortest amount of daylight hours 4. ~ 9 to 10 hours of daylight hours
Winter Daylight hours increasing
Remember…Earth’s orbit is… Earth’s orbit around the sun is nearly circular, but not a perfect circle! Earth’s orbit is an ellipse.
When are we closest to the sun? Perihelion: occurs 2 weeks after… THE WINTER SOLSTICE January 4 th (this year)
When are we farthest from the sun? Aphelion: occurs 2 weeks after… THE SUMMER SOLSTICE July 6 th (this year)
IT IS NOT THE DISTANCE THAT WE ARE FROM THE SUN THAT DETERMINES THE SEASONS! Then what is it?
The Seasons A Northern Hemisphere Perspective. The Seasons Definitions Axis: An imaginary axle that passes through the North and South Poles Rotation.
The Earth’s Revolution. Rotation is one type of motion that the Earth goes through. Another is revolution Revolution – the movement of the Earth around.
Days, Years & Seasons. Days and Nights Rotation: the Earth turns around on its axis 1 day=24 hours (one rotation) One half of the Earth is always in light.
658 – 665 Section 1. * Definition: Study of the moon, stars and space * Why would it be beneficial to study Astronomy? * Develop a calendar * Agriculture.
Why do we have seasons? Fold your paper into a Frayer model: 4 equal rectangles.
Sun, Moon, Earth, How do they work together to help life survive? Seasons.
Why do we have day and night?. Earth’s rotation The Earth rotates on its axis (imaginary vertical line around which Earth spins) every 23 hours & 56.
How does the Earth move in space? What causes the cycle of the seasons on Earth?
Seasons What do your students think causes the seasons? By the Lunar and Planetary Institute For use in teacher workshops.
Chapter 19.1 Earth in Space p The Past: At one time people thought the Earth was the center of the universe. They believed Earth stood still.
Winter Solstice Dec. 21, 22 Spring Vernal Equinox March 20,21 Summer Solstice June 21 Fall Autumnal Equinox Sept. 22,23 Seasons Patterns of temperature.
Two reasons the Earth has seasons: degree tilt 2. Revolution around sun.
Grade 8. Parallax Perihelion Aphelion Seasons Summer Solstice Tropic of Cancer Winter Solstice Tropic of Capricorn Vernal Equinox
The ReasonS for the Seasons Lesson 4. In which direction does Earth’s axis point as it revolves around the Sun?
Vernal Equinox, the First Day of Spring By Dr. Harold Williams of Montgomery College Planetarium
Why do we have seasons?. Earth’s rotation The Earth rotates on its axis (imaginary vertical line around which Earth spins) every 23 hours & 56 minutes.The.
Reasons for the Seasons Subject: Science Topic: Astronomy.
The Reason for the Seasons EARTH’S TILT Length of Day – Angle of Rays.
Let’s Review. A location’s latitude determines its temperature trend during the year. Locations at or near the equator experience very little change.
What causes seasons? The tilt of the Earth on its axis The 23.5° tilt is caused by the interaction between the Moon and the Earth.
Movement of Earth Why do our seasons change?. Rotation V/S Revolution Rotation is the spinning of a moon or planet on its AXIS Revolution is planets movement.
What Causes the Seasons?. What about seasons? Why do we have them? Earth’s distance from the sun varies throughout the year – doesn’t that cause the seasons?
Hosted by Mrs. Judy Choice1Choice 2Choice 3Choice
Concept Map. This affects the angle of the Sun’s rays and the length of the daylight hours.
Why do we have seasons?
4 Seasons: 1.1 Notes imgres. Astronomy study of the stars, moon, planets and other objects in space.
Definition: The spinning of the Earth on its axis, causing night and day. Extra Fact: One of these equals about 24 hours.
Reasons for the Seasons Chapter Figure 1.1 Nearly 150 million kilometers separate the sun and Earth, yet solar radiation drives Earth's weather.
Season Vocabulary Seasons – A pattern of temperature changes & other weather trends over a year.
The Earth in Space. The Earth’s Gravity ► – force of attraction between all matter. ► Gravity – force of attraction between all matter. ► – the force.
Earth in Space Section 1-1 P Astronomy The study of space. The study of the Moon stars and other objects in Space.
Why do we have seasons?. Two Movements of Earth Rotation: The Earth rotates on its axis One day on Earth is one rotation of the Earth. Day vs. Night Demo.
Earth in Space. What causes day and night? ROTATION : Earth spinning on its axis is called its rotation and it causes day and night. It takes 24 hours.
1. Rotation- spinning of earth on its axis. a. CAUSES DAY AND NIGHT b. sun cannot reach the side of earth facing away from it, so it is night there. c.
Seasons By: Brittany D. Alexander. Rotation Earth spins around an imaginary line called the: Axis of Rotation The Earth’s axis is tilted Spinning counterclockwise.
What causes the seasons? 1. Essential Question: How does the Earth’s motion explain what we observe in the changing seasons? 2.
Motions of the Solar System. Earth’s Motions Earth has Three Motions 1. Daily 2. Yearly 3. Cyclic.
The Motion of the Sun. ack-hole-powers-cosmic-flashlight- illuminating-the-cosmic-web
Introduction to World Geography Mr. Healey. Equator Imaginary line that divides the earth into northern and southern hemispheres. It is expressed as 0°
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.
Earth in Space EARTH, THE SUN, AND THE SEASONS. Earth, the Sun, and the Seasons Why is Earth colder in winter than in the summer? Not because Earth.
Welcome to Astronomy! Find your place in Space!. Astronomy The study of the Moon, Stars, and other objects in space.
Equinox and Solstice What are they and why are they important to us?
Lesson 3 Notes Seasons on Earth What Causes Seasons?
Why do we have seasons?. Earth’s rotation The Earth rotates on its axis (imaginary vertical line around which Earth spins) every 24 hours.The Earth rotates.
Spring “Vernal” Equinox Spring begins March 20 at 9:57 AM PDT Equal Days Equal Nights Sunrise: 709 AM Sunset: 718 PM Data for Sacramento.
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