NASA
NASA | Satellite Tracks Saharan Dust to Amazon in 3-D
For the first time, a NASA satellite has quantified in three dimensions how much dust makes the trans-Atlantic journey from the Sahara Desert to the Amazon rainforest. Among this dust is phosphorus, an essential nutrient that acts like a...
Catalyst University
A&P I Lab | Exercise 3a: Diffusion, Osmosis, & Diffusion Rate
A&P I Lab | Exercise 3a: Diffusion, Osmosis, & Diffusion Rate
FuseSchool
Atoms Practice Exam Question 2
Work through this practice GCSE / K12 question on atomic number, atomic mass and electronic configuration. Read the question, and hit pause if you want to try answering it yourself. Then hit play again to watch how the teacher solves it.
Next Animation Studio
Ocean contains a million times more microplastic particles than previously thought
A new study from the Scripps Institution of Oceanography at the University of California San Diego suggests that the ocean could potentially contain a million times more microplastic particles than previously thought.
NASA
NASA | THEMIS Discovers Biggest Breach of Earth's Magnetosphere
NASA’s THEMIS mission has overturned a longstanding belief about the interaction between solar particles and Earth’s protective magnetic field. This new discovery could help scientists predict when the solar storms that can disrupt power...
NASA
ATom Postcard - Samoa to New Zealand
Principal Investigator Steven Wofsy of Harvard University and atmospheric scientist Paul Newman of NASA’s Goddard Space Flight Center sent back a video postcard of the second two legs of the Atmospheric Tomography, or ATom mission. They...
Professor Dave Explains
IIT/JEE Chemistry Practice #35: Gaseous Equilibria
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
NASA
The Solar Wind: A Heliophysics Sea Shanty (The Wellerman parody)
Parodying the classic sea shanty "The Wellerman," “The Solar Wind: A Heliophysics Sea Shanty” illuminates one of the primary connections between the Sun and Earth, the solar wind. The solar wind is a constant outflow of magnetized...
NASA
NASA | The Van Allen Probes - Instrument Overview
Dr. David Sibeck explains the instruments on the twin Van Allen Probes (formerly the Radiation Belt Storm Probe, RBSP). The Van Allen Probes will explore the Van Allen Radiation Belts in the Earth's magnetosphere. The charged particles...
Astrum
How bad is the radiation on Mars?
How do scientists plan to get astronauts to Mars when space radiation is so strong? What can be done about it?
Science360
Black Carbon -- Changing Planet
Black carbon, composed of tiny particles of soot, is produced whenever organic substances like fossil fuels, firewood or coal is incompletely burned. These particles are polluting the air and causing serious health and environmental...
NASA
NASA | Scientists Answer Top Space Weather Questions, Part 1
NASA scientists answer some common questions about the sun, space weather, and how they affect the Earth. This is a two-part series. Part One addresses: 1. What is space weather? 2. What are coronal mass ejections? 3. What are solar...
NASA
Going Interstellar with TESS and Kepler
For the longest time, space seemed like just a big, nearly empty place. However, as we learned more about the universe around us, we discovered other planets orbiting our Sun, and even planets that orbit other stars trillions of miles...
NASA
Supercharging the Radiation Belts
On March 17, 2015, an interplanetary shock – a shockwave created by the driving force of a coronal mass ejection, or CME, from the sun – struck the outermost radiation belt, triggering the greatest geomagnetic storm of the preceding...
NASA
First Map of Mars Electric Currents
Five years after NASA’s MAVEN spacecraft entered into orbit around Mars, data from the mission has led to the creation of a map of electric current systems in the Martian atmosphere. Unlike Earth, Mars lacks a protective global magnetic...
Catalyst University
Quantum Mechanics | The Hydrogen Line Spectrum
Introductory video to the hydrogen line spectrum, which in part led to the initial development of quantum mechanics.
NASA
NASA | Tracking Energy through Space
Simulation courtesy of J. Raeder/UNH. This short video features commentary by David Sibeck, project scientist for the THEMIS mission, discussing a visualization of reconnection fronts. Taking advantage of an unprecedented alignment of...
NASA
NASA | Glory: The Particle Puzzle
This episode explores the complexity of atmospheric aerosols- how they impact climate and how researchers study them. Glory's Aerosol Polarimetry Sensor and Cloud Camera will provide an unprecedented data set for helping scientists...
Curated Video
Thermal Conduction: How Energy is Transferred Through Solids
This video explains the concept of thermal conduction, which is the transfer of thermal energy through solids. The video discusses the three main mechanisms of thermal energy transfer, thermal conduction, convection and thermal...
Curated Video
Factors Affecting the Rate of Reaction
The video discusses the factors that affect the rate of chemical reactions. The first factor is the number of collisions with enough energy to react. Other factors include changing the pressure, concentration, surface area, and...
NASA
Welcome to the Ionosphere
Learn about the features of the ionosphere! This little-explored region exists between space and Earth. It is home to the aurora, the international space station, a variety of satellites, and radio communication waves. We know it is...
NASA
SPEXone: Dutch Instrument Arrives for PACE Mission
Aerosols are small solid or liquid particles suspended in the air that affect climate change directly through interactions with solar radiation. Aerosols affect climate indirectly by changing the micro- and macro-physical properties of...
Professor Dave Explains
The Third Law of Thermodynamics: Absolute Zero
Brr, it's so cold today! Could it get any colder? Is there a coldest possible temperature? Yes, there is! That seems strange, but now we know that temperature is just a measure of kinetic energy, so zero kinetic energy must mean zero...
NASA
NASA | Sun-Earth Day - Promo 2
On March 20, 2009, at 1:00 p.m. EDT, join a panel of scientists for a live Sun-Earth Day Webcast. During the webcast, scientists will share discoveries about the sun, while students monitor the sun and prepare their own space weather...