Earth in Space Section 19.1. Earth’s Shape Considered to be ellipsoid Oblate spheroid Earth is wider than it is tall Bulges at equator, flattened at poles.

Slides:

Advertisements

Similar presentations

Earth’s Motions.

Advertisements

Earth, Moon, and Sun.

Ch. 7 Earth in Space.

 a body that orbits a planet.  An object that orbits the sun  Large enough to have become rounded by its own gravity.

Gravity and Motion Section 2: Pages

Bill Nye on Planets and Moons

Seasons and the Angle of Solar Radiation Rotation: the time it takes a planet to rotate (spin) once on its axis. For Earth = 1 day.

Solar Motion. Label front flap MOTIONS OF THE EARTH -DAY & NIGHT.

Gravity and Motion Chapter 19 section 2. Isaac Newton realized that there must be a force acting between Earth and the moon that kept the moon in orbit.

Earth in Space. All planets REVOLVE around the sun. Revolution is the movement of one object around another. One revolution equals the time it takes to.

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.

The Earth in Space. The Earth’s Gravity ► – force of attraction between all matter. ► Gravity – force of attraction between all matter. ► – the force.

24.2 Sun and Seasons

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.

Movements of the Earth The Earth’s Motion in Space.

Earth in Space Section 19.1.

 Reasons for the Seasons Subject: Science Topic: Astronomy.

658 – 665 Section 1. * Definition: Study of the moon, stars and space * Why would it be beneficial to study Astronomy? * Develop a calendar * Agriculture.

How does the Earth move in space? What causes the cycle of the seasons on Earth?

Earth in Space Chapter 19 Section 1 Pages Chapter 19 Section 1 Pages

The Reason for the Seasons

Earth in Space.

Climates, Seasons, & Days

What shape is the Earth’s orbit?

1 Lecture 29 Measuring Time on Earth Ozgur Unal. 2  What time is it in your hometown at the moment?  What time is it in NYC?

Earth in Space. How Earth Moves Earth moves through space in two major ways: rotation and revolution.

Reason for Seasons Aim: How does the tilt of Earth’s axis and Earth’s movement cause seasons?

Aim: What are some of the results of Earth’s Motions? I. Earth’s Motions A. Rotation (Spinning) 1. Day and Night Why does the sun rise in the east and.

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.

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.

Let’s Review.  A location’s latitude determines its temperature trend during the year.  Locations at or near the equator experience very little change.

Seasons. Seasons happen because of Earth’s tilt on its axis AND revolution around the Sun. Axis- imaginary line drawn from the north to the south pole.

Ch 9 Earth in Space Reason for our Seasons. Earth’s Rotation : spin on its axis! Axis is an imaginary line running from N to S pole. The axis is tilted.

What are the motions of the Earth?. Earth and the Moon in Space The Earth and the moon are part of the sun’s planetary system. Pulled by the sun’s gravity,

Where did summer go?. Summer at Lake Harriet Winter Carnival in St. Paul Fall at Minnehaha Park Twins Spring Training.

How many words related to the solar system do you know? Complete a solar system word scramble! Using these 24 letters, try to come up with 10 words during.

What keeps us doing what we're doing?? There are two things that keep objects rotating and revolving in the universe...

Chapter 13 – Atmosphere and Climate Change Section 1a – Climate - Seasons.

Movements of Earth.

Astronomy Vocabulary Set #1

Reason for Seasons Aim: How does the tilt of Earth’s axis and Earth’s movement cause seasons?

Earth in Space.

Section 19.1 Earth in Space.

Inertia Gravity 1. a tendency 1. a force 2. Newton’s 1st law Both

Reasons for the Seasons

Motion of the Earth Bellwork 10/25 - Wednesday

Objectives 2f and 4c 2f = 3/3 = 100% 4c = 11/11 = 100%

The Solar System How many words related to the solar system do you know? Complete a solar system word scramble! Using these 24 letters, ( don’t repeat.

Earth in Space Section 19.1.

Climates, Seasons, & Days

ROTATION REVOLUTION PRECESSION

Earth’s Motion.

Climates, Seasons, & Days

Earth in Space Ch. 1, Section 1 Page

Movement of the Earth Seasons & Movemements.

Earth and Moon Notes.

Space Unit EARTH.

HOW DOES THE EARTH MOVE?.

The Earth, Moon, and Sun.

What are the motions of the Earth?

Climates, Seasons, & Days

Earth Motions and Tilt.

What is the difference between rotation and revolution?

Climates, Seasons, & Days

Climates, Seasons, & Days

Earth Notes Chapter 12.

Earth, Moon, and Sun.

Third Rock From the Sun S6E2- Students will understand the effects of the relative positions of the earth, moon, and sun. c. Relate the tilt of the earth.

Presentation transcript:

Earth in Space Section 19.1

Earth’s Shape Considered to be ellipsoid Oblate spheroid Earth is wider than it is tall Bulges at equator, flattened at poles

Earth’s motions Rotation – spinning on an axis - causes day and night The earth moves toward the east causing the sun to appear to move to the west

Earth’s Motions 1. sidereal day The time it takes the Earth to rotate once with respect to a reference star. One 360° Rotation Time = 23 hr. 56 min. 1-2: Globe rotates 360° - sidereal 1-3: Globe re-points to sun - synodic

Earth’s motions 2. solar (synodic) day = 24 hours The time it takes Earth to rotate once with respect to the sun. (Sun’s Highest point in sky to the next highest point in sky).

Earth’s Motions Revolution – movement around a fixed point (sun) The path of the earth’s revolution around the sun is called an orbit

Earth’s Motions - Revolves once every days (year) need leap years - elliptical shaped orbit - Jan million km from sun - July million km from sun

Seasons on Earth Earth’s axis is tilted 23.5 o The area tilted towards sun has longer days and more radiant energy (summer) The area tilted away from the sun has shorter days and less radiant energy (winter)

Seasons on Earth stronomy.org/programs/seasons/&sa=U&ei =ZmKqT_ucDKaN6QHvreHBBA&ved=0CC4 QFjAI&usg=AFQjCNGSxsNkGIzK6LUgpd7s 0ZgkrOxDZghttp:// stronomy.org/programs/seasons/&sa=U&ei =ZmKqT_ucDKaN6QHvreHBBA&ved=0CC4 QFjAI&usg=AFQjCNGSxsNkGIzK6LUgpd7s 0ZgkrOxDZg

Winter solstice Dec 21 or 22 Shortest day Summer solstice June 21 or 22 Longest day Vernal equinox March 20 or 21 Autumnal equinox Sept 22 or 23 Solstice – the sun reaches the greatest distance north or south of the equator Equinox- the sun is directly above the equator. Equal daylight and night time hours all over the world

Earth’s Motions Precession – Earth’s wobble

Law of universal gravitation: every object in the universe attracts every other object. Earth’s Orbit Isaac Newton

Attracts all objects towards each other.

Depends on two factors: MASS THE DISTANCE The amount of matter (stuff) in an object STRONGER

MASS The amount of matter (stuff) in an objectThe amount of matter (stuff) in an object Does not changeDoes not change WEIGHT Force ( a push or pull) of gravity on an object.Force ( a push or pull) of gravity on an object. Changes depending on where you are.Changes depending on where you are. VS

265 lbs About 45 lbs =120 x 1.6

Earth’s Orbit Inertia – the tendency of an object to resist change in motion Newton’s first law of motion An object in motion will stay in motion, in straight line, at a constant speed unless acted upon by an outside force system/planet-weight-calculator.htmlhttp:// system/planet-weight-calculator.html

Earth’s Orbit Inertial force Gravitational force Newton concluded that 2 forces (inertia, gravity) combine to keep Earth in orbit around the sun