Year 7 Earth & Space Sciences
Earth
GVRL
- EarthSource: Space Sciences. Ed. John F. McCoy. Vol. 2: Planetary Science and Astronomy. 2nd ed. Detroit: Macmillan Reference USA, 2012. p71-76.
NASA
Earth Facts
Size and Distance
With a radius of 3,959 miles (6,371 kilometers), Earth is the biggest of the terrestrial planets, and the fifth largest planet overall.
From an average distance of 93 million miles (150 million kilometers), Earth is exactly one astronomical unit away from the Sun because one astronomical unit (abbreviated as AU), is the distance from the Sun to Earth. This unit provides an easy way to quickly compare planets' distances from the Sun.
It takes about eight minutes for light from the Sun to reach our planet.
Source: NASA
Published: September 15, 2018
Earth's Inner Core
Source: Royal Swedish Academy of Sciences, via NASA
Published: May 18, 2016
Earth
Our home planet is the third planet from the Sun, and the only place we know of so far that’s inhabited by living things. While Earth is only the fifth largest planet in the solar system, it is the only world in our solar system with liquid water on the surface. Just slightly larger than nearby Venus, Earth is the biggest of the four planets closest to the Sun, all of which are made of rock and metal.
NASA Science
https://solarsystem.nasa.gov/planets/earth/in-depth/
Page Updated: January 25, 2018
Earth
The Earth is composed of systems and layers that interact with each other, fostering life and making our planet what it is today. These systems include the biosphere, the geosphere, the hydrosphere and the atmosphere. Discover their characteristics, how they interact, and learn that our planet was not always as we know it now.
The Earth's Movement
This video explains how the movements and position of the Earth in space determine the day and night, the seasons and the very existence of life on our planet.
Earth Facts
Formation
When the solar system settled into its current layout about 4.5 billion years ago, Earth formed when gravity pulled swirling gas and dust in to become the third planet from the Sun. Like its fellow terrestrial planets, Earth has a central core, a rocky mantle and a solid crust
Source: NASA
Published: September 15, 2018
Everything You Need To Know About Planet Earth
Planet Earth is this solid thing you are standing on right now. In your everyday life you don't really waste a thought about how amazing this is. A giant, ancient, hot rock. How did it come into existence and how big is it really? You will be surprised. The ground you are standing on is just a very, very small part of the big picture.
Source: Kurzgesagt (Youtube) Published: on Aug 04, 2014
Catalogue
Planet Earth by ISBN: 9780746006375Publication Date: 1991-01-01
The 100 by
The first book in the New York Times bestselling series that inspired the hit CW television show. No one has set foot on Earth in centuries -- until now. Ever since a devastating nuclear war, humanity has lived on spaceships far above Earth's radioactive surface. Now, one hundred juvenile delinquents -- considered expendable by society -- are being sent on a dangerous mission: to recolonize the planet. It could be their second chance at life...or it could be a suicide mission. CLARKE was arrested for treason, though she's haunted by the memory of what she really did. WELLS, the chancellor's son, came to Earth for the girl he loves -- but will she ever forgive him? Reckless BELLAMY fought his way onto the transport pod to protect his sister, the other half of the only pair of siblings in the universe. And GLASS managed to escape back onto the ship, only to find that life there is just as dangerous as she feared it would be on Earth. Confronted with a savage land and haunted by secrets from their pasts, the hundred must fight to survive. They were never meant to be heroes, but they may be mankind's last hope.
ISBN: 9780316234498Publication Date: 2014-03-18
Shades of Earth by
Amy and Elder have finally left the oppressive walls of the spaceship Godspeedbehind. They're ready to build a new home on Centauri-Earth, the planet that Amy has travelled across the universe to experience. But this new Earth isn't the paradise that Amy had been hoping for - and they aren't the only ones there. Each new discovery brings more danger. And if their colony collapses then everything they have sacrificed - friends, family, life on Earth - in order to build a future together will have been meaningless
ISBN: 9780141333700Publication Date: 2013-01-15
Earth Facts
Orbit and Rotation
As Earth orbits the Sun, it completes one rotation every 23.9 hours. It takes 365.25 days to complete one trip around the Sun. That extra quarter of a day presents a challenge to our calendar system, which counts one year as 365 days. To keep our yearly calendars consistent with our orbit around the Sun, every four years we add one day. That day is called a leap day, and the year it's added to is called a leap year.
Earth's axis of rotation is tilted 23.4 degrees with respect to the plane of Earth's orbit around the Sun. This tilt causes our yearly cycle of seasons.
Source: NASA
Published: September 15, 2018
Apollo 10 View of the Earth
Source: NASA
Published: May 18, 2016