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Chapter 11: Our Solar System
Chapter 11: Our Solar System

... We see the Moon because it reflects the Sun’s light. As the Moon revolves around Earth, the illuminated portion of the Moon appears to change. The different appearances of the Moon as it orbits Earth are called lunar phases, or phases of the Moon. The phases of the Moon change over a period of about ...
ch9.ppt
ch9.ppt

... B orbit of A has a radius of 1x108 km. The distance of closest approach of B to the star is 5x107 km and its maximum distance from the star is 1x109 km. If A has a rotational period of 1 year, what is the rotational period of B? ...
Overview of Our Solar System
Overview of Our Solar System

... • Earth is one of nine planets revolving around, or orbiting, the Sun. • All the planets, as well as most of their moons, also called satellites, orbit the Sun in the same direction, and all their orbits, except Pluto’s, lie near the same plane. • The planets of our solar system have various sizes, ...
Solar System: Planets and Moon Size and
Solar System: Planets and Moon Size and

... hours. Mars has a very thin atmosphere which is composed largely of CO2. Its surface is very cold, and is covered with craters, volcanoes, and large canyons. Mars is reddish in color. Mars has two small moons. It is named for the Roman god of war. 5. Jupiter is the largest planet in the Solar System ...
File - Mr. Catt`s Class
File - Mr. Catt`s Class

... A Hypothesis Explaining Venus / Earth Differences 1. Venus’s high surface temperature (being closer to the Sun) didn’t allow water to condense out of its atmosphere into oceans that could absorb CO2 (as happened on Earth). High in Venus’s atmosphere, the Sun’s UV light broke down water molecules in ...
Saturn – “The Lord of the Rings”
Saturn – “The Lord of the Rings”

... Pluto is no longer a planet Differs very much from the others • Mostly composed of rock with a water-ice mantle • Its atmosphere contains methane ice (and perhaps N2, CO, CO2) • Other outer planets mainly composed of gas • Higher density than the other planets • Biggest moon (Charon) very large in c ...
Taking a Voyage Away From Home
Taking a Voyage Away From Home

... Understanding of phenomena due to the Earth’s rotation actually begins at a very early age in children, as the children develop the concept of day and night, when they should be awake or asleep, and when they are hungry or tired. Students should begin to realize that the Sun only appears during the ...
rotational_kinematics_worksheet_packet-key
rotational_kinematics_worksheet_packet-key

... (3) Identify the force( s) involved with circular motion. There may be one or several. (4) Use your equations to solve the problem Problem 1. The following problem is a pretty common physics situation. A person revolves an object in an approximate horizontal circle. The hand and arm muscles provide ...
Notes-GravityandCelestialMotion
Notes-GravityandCelestialMotion

...  Likewise, the Moon revolves (orbits) around the Earth. 1) You can show the Sun, Earth, and Moon at the same time. 2) You can show the direction of gravity. 3) You can adjust the revolution speed. 4) You can show the orbital paths. 5) Just for Fun: You can “turn off” the gravity. Earth ...
Science Program — Grade 5
Science Program — Grade 5

... Do you like math? It was a mathematician who discovered the planet Neptune, not an astronomer. Actually, two different mathematicians were trying to figure out why Uranus’s orbit was different than astronomers predicted. They hypothesized that there must be another planet affecting the orbit and – s ...
Chapter 7 Resource: Earth in Space
Chapter 7 Resource: Earth in Space

... 1. Why do you think the Copernicus ejecta field is longer than it is wide? ...
here - ScienceA2Z.com
here - ScienceA2Z.com

... 6. After batter is divided have the group leaders bring the ingredients back up and grab the decorating materials. Have the students roll their planets into balls and start decorating. Remind the students to try and make their edible planet look like the real thing. Which planets are rocky? Which ha ...
Why explore Venus? - Deep Blue
Why explore Venus? - Deep Blue

... residue of HzO - about 10% of the initial value. For this remaining water vapor, the escape rate would have been inhibited by diffusion, by low exospheric temperatures and inadequate sources for non-thermal escape such as sweeping by the solar wind. To get rid of this last vestige of water would hav ...
Session 6 – Evidence for a young eath Pt.2
Session 6 – Evidence for a young eath Pt.2

... Predictive power of the Rapid Decay Theory Dr. Humphreys who authored the theory has calculated and predicted magnetic strengths of other planets/moons These calculations are based on three important factors, the mass of the object, the size of the core and how well it conducts electricity, and the ...
Is the Solar System stable?
Is the Solar System stable?

... interactions of the planets. Laplace showed that his simplified system was integrable and that there were long-term periodicities (typically,tens of thousands of years) in the movement of the orbits of the planets: he thought he had achieved the elusive analytical solution. Unfortunately,the very te ...
Pluto naomi
Pluto naomi

... • Pluto has three known moons. The largest, Charon, is proportionally larger, compared to its primary, than any other satellite of a known planet or dwarf planet in the solar system. The other two moons, Nix and Hydra, are much smaller. • Pluto has no known rings. • not very well. There would be min ...
Light: The Cosmic Messenger
Light: The Cosmic Messenger

... • What caused the orderly patterns of motion in our solar system? – Solar nebula spun faster as it contracted because of conservation of angular momentum – Collisions between gas particles then caused the nebula to flatten into a disk – We have observed such disks around newly forming ...
Chapter 30 - TeacherWeb
Chapter 30 - TeacherWeb

... It is theorized that the moon formed in stages: Stage 1: A cosmic collision caused by a Mars sized planet colliding with the Earth. Stage 2: The moon was covered by an ocean of molten rock of which the denser material settled to the center (the core). ...
Balancing planetary energy budgets
Balancing planetary energy budgets

... Mars (1, p. 16) rotates at almost exactly the same rate as the Earth and with a similarly tilted axis. It has only around half the diameter of Earth, with no oceans and a thin atmosphere composed almost entirely of CO2. Many scientists have studied Mars and its atmosphere is well understood. Martian ...
8-4.1 - S2TEM Centers SC
8-4.1 - S2TEM Centers SC

... Sun’s light prevents us from seeing stars during the day.)  There are thousands of stars in our solar system. (There is just one star in our solar system – the Sun.)  Because the apparent diameter of the Sun in the sky from Earth is similar to the Moon’s diameter, many students this age may think ...
Unit 2 Lesson 1
Unit 2 Lesson 1

... Compare Inner and Outer Planets • Size, surface features, distance from the sun, temperatures, number of moons, and diameter make the inner and outer planets different. • The period of revolution of a planet is the time it takes for a planet to revolve around the sun. • The period of rotation of a p ...
Zoom Astronomy is a comprehensive on
Zoom Astronomy is a comprehensive on

... Earth is the densest planet in our Solar System. To escape the Earth's gravitational pull, an object must reach a velocity of 24,840 miles per hour (11,180 m/sec). LENGTH OF A DAY AND YEAR ON EARTH Each day on Earth takes 23.93 hours (that is, it takes the Earth 23.93 hours to rotate around its axis ...
Mercury Fun Facts
Mercury Fun Facts

... Mercury is the planet _________________________ to the Sun in our Solar System and the fastest _________________________ planet in our Solar System. It is the second-hottest planet in our Solar System (only _________________________ is hotter). Mercury is so close to the _________________________ th ...
USU 4-H Space Tote - Utah 4-H
USU 4-H Space Tote - Utah 4-H

... or 5.2 times as far away from the sun as Earth. If the sun were as tall as a typical front door Jupiter would be about as big as a basketball. Jupiter is a gas-giant planet and therefore does not have a solid surface. However, it is predicted that Jupiter has an inner, solid core about the size of t ...
2009_Lecture15.v2
2009_Lecture15.v2

... • Removal of most of Mercury’s crust by collision • Collision made Venus rotate backwards • Collision tipped Uranus onto its side (now rotates at 90 deg to rotation axes of all other planets) • “Late Heavy Bombardment” (~3.9 billion years ago) from Lunar ...
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Earth's rotation



Earth's rotation is the rotation of the planet Earth around its own axis. The Earth rotates from the west towards east. As viewed from North Star or polestar Polaris, the Earth turns counter-clockwise.The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface. This point is distinct from the Earth's North Magnetic Pole. The South Pole is the other point where the Earth's axis of rotation intersects its surface, in Antarctica.The Earth rotates once in about 24 hours with respect to the sun and once every 23 hours 56 minutes and 4 seconds with respect to the stars (see below). Earth's rotation is slowing slightly with time; thus, a day was shorter in the past. This is due to the tidal effects the Moon has on Earth's rotation. Atomic clocks show that a modern-day is longer by about 1.7 milliseconds than a century ago, slowly increasing the rate at which UTC is adjusted by leap seconds.
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