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Earth spins around its axis at an angle of 23 degrees. This means that as Earth orbits the sun, different parts of the planet get more or less exposure to the sun. The tilt of the Earth is responsible for the seasons, climate, and weather. Part of the "Orbit: Earth's Extraordinary Journey" series.
(Source: DCMP)
The Earth has been knocked off its axis, and the seasons are changing rapidly. Superhero Autumn Ray has to return the Earth's axis to its correct angle. As she works to slow the change of seasons, she explains the relationship between the tilt of the Earth's axis and the seasons. Part of "The Science of Climate" series.
The path the Earth takes around the sun is in just the right place. The trajectory of the Earth's orbit ensures life is able to exist, and this orbital journey influences almost everything on Earth. Part of the "Orbit: Earth's Extraordinary Journey" series.
What causes day and night? Why do we have seasons? Through easy-to-understand animations, as well as live-action video footage, these difficult concepts are easily explained. The rotation of Earth on its axis, and its revolution around the sun are the focus of this video. Colorful graphics illustrate the movement of our planet throughout the course of a year. Important terminology includes: axis, tilt, rotation, revolution, orbit, season, solstice, and equinox.
Part of the animated "Johan, the Young Scientist" series. Johan wonders why people don't fall off Earth if it really is round. He travels to ScienScape to find out. Professor Hoo sends Johan, Ani, and Moki to Earth to work on an experiment.
Scientists and conservationists use the latest technologies as they work to preserve and protect over 5,000 endangered animals. Some techniques include communication with animals, raising orphans, moving animals to new areas, and mating programs in zoos. Uses a Q and A format.
The planets closest to the sun, often referred to as the inner planets, are the focus of this program. Colorful animations, along with images captured by space probes, illustrate the characteristics of Mercury, Venus, Earth, and Mars. The fundamental structure of the solar system and the process by which planets revolve around the sun are discussed. Special attention is given to the features that make Earth unique in the solar system. Important terminology includes: sun, orbit, revolve, gravity, inertia, rotation, axis, atmosphere, and spacecraft.
Spin plays a key role in controlling the planet. It drives the day and night cycle and controls the weather and climate. This episode explores how the spin of Earth sets the rhythm of life on planet Earth. Part of the "Orbit: Earth's Extraordinary Journey" series.
The Earth has many land formations such as mountains, plateaus, hills, and plains. These formations are created by movement of the earth’s plates, volcanoes, weather, and erosion. Part of the Real World Science series.
As shown on the History Channel. In the remote wastes of Siberia buried under snow are the remains of one of the greatest catastrophes that the Earth has endured. 250 million years ago, huge volumes of lava spewed out onto the surface--so much that it would have buried the whole of Texas under one mile of lava. At first the temperature dipped but then the greenhouse gases that escaped from the depressurized lava caused a massive global warming. It wreaked havoc, and 95% of the species on Earth became extinct. Yet life hung on and in time this disaster paved the way for the next phase of life on earth--the age of the dinosaurs.
Host Trace Dominguez sets out to discover how elements are formed. He elicits help from Dr. Ian O'Neill. During their conversation, they discuss the role that stars play in creating heavy elements throughout the universe.
Scientists know that Earth’s climate has changed many times over billions of years and that Earth’s climate is always changing. Students will understand that climatologists are scientists that look for evidence from the past to help study climate change. This program also highlights the natural factors that affect climate change as well as the connection between the burning of fossil fuels and climate change. Part of the "Real World Science" series.
Earth’s climate is changing in a big way, and it’s because there's more carbon dioxide in the atmosphere than at any point in human history. But Earth’s climate has changed before. How are scientists studying the impact of human behavior on climate? They are collecting ice cores and analyzing the tiny bubbles of ancient atmosphere trapped in the cores. Part of the "It's Okay to Be Smart" series.
As shown on the History Channel. From Alaska to New Mexico, the Rockies are one of the great mountain belts of the world--caused by tectonic forces of the Pacific Plate pushing against the North American continent. They have formed as the earth's continental crust has been shortened under pressure, by around one inch a year. What's more, they are still rising and they are still young in geologic terms: when the dinosaurs roamed the Earth they had not even started to form.
Earth's moon was probably formed when a body the size of Mars collided twice with the planet. The moon is steadily receding into space; eventually, due to the loss of this lunar regulator, Earth will start to wobble, creating climatic chaos. Eclipses can be also seen often when the sun obscures the moon or vice versa. Another light show, the Aurora, occurs when electrified particles from the solar wind interact with Earth's upper atmosphere and is visible particularly in the Polar Regions.
Gravity rules the life cycle of stars. During the Red Giant dying stage in the life of an average size star, its outer layers are blown off in vast clouds of dust and gas called "nebulae" that contain hydrogen, oxygen, and nitrogen. Gravity crushes the remaining atoms into a remnant core called a white dwarf. The gravity of giant stars-10 to 20 times larger than average-will, at the end of their life in a supernova explosion, crush together even mutually repulsive protons and electrons, leaving a remnant rotating core of neutrons (i.e., a pulsar). Also explains how stars 20 to 100 times average size collapse into a core so dense that its gravity doesn't even allow light to escape (i.e., a black hole).
Argon is a chemical element with the symbol Ar and atomic number 18. It is a noble gas and the third-most abundant gas in the Earth's atmosphere.
(Source: Library Lyna)
Xenon is a chemical element with the symbol Xe and atomic number 54. It is a colorless, dense, odorless noble gas found in Earth's atmosphere in trace amounts.
Astatine is a chemical element with the symbol At and atomic number 85. It is the rarest naturally occurring element in the Earth's crust, occurring only as the decay product of various heavier elements.
Aluminium is a chemical element with the symbol Al and atomic number 13. It is a silvery-white, soft, non-magnetic and ductile metal. By mass, aluminium is the most abundant metal in the Earth's crust.
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3D models and images of the entire periodic table of elements
A collection containing 118 resources, curated by Library Lyna
Biology related concepts
A collection containing 59 resources, curated by Benetech
