In this video, we explore the fascinating natural phenomenon of auroras, where swirling lights appear in the sky. We learn about the science behind auroras, how they are formed near the Earth's polar regions, and the interaction between...

Learn about the two main layers of the atmosphere: the troposphere and the stratosphere. The troposphere is full of weather and ‘bad’ ozone, and above that, is the stratosphere, where ‘good’ ozone protects us against dangerous UV light....

The video discusses how the Earth's atmosphere has evolved over the past 4.6 billion years, with a focus on the composition of gases present over different periods of time. It highlights the role of volcanoes, oceans, plants, and fossil...

In this video, we explore the biosynthetic pathway for cocaine, as it occurs in the leaves of the Coca plant.

In this episode of Gravity Assist, Jim Green talks with New Horizons Principal Investigator Alan Stern of the Southwest Research Institute about what the July 2015 flyby of Pluto revealed about this mysterious and diverse world.

In episode 47, Jordan and Charlie explore how scientists at the University of Texas at Austin have solved the longstanding mystery about how some fish “disappear” from their predators. A fish’s ability to go invisible in polarized light...

The 3 simple ingredients of sun, air and water lead to every type of weather on Earth. The atmosphere is constantly trying to balance heat from the sun with water vapor and air to create a dynamic planet. The unique properties of the...

In this video, we discuss the rules [with examples] for naming binary molecules in general chemistry.

This program addresses many of the cycles conducted by animals including those of migration, hibernation, and patterns relating to day and night. The cycles that affect all living things are discussed including the air we breathe and the...

This video provides an overview of MPK fertilizers, explaining what they are, why they are needed, and where they come from. The video discusses the three main nutrients that are required for healthy plant growth - nitrogen, phosphorus,...

Learn the basics about Extraction of oxygen and nitrogen from liquid air. How do you extract oxygen? What are nitogren's properties? Find out more in this video!

It explains chemical reactions of diazonium salts under two conditions.

What's the best way get a sample of an asteroid? Play tag with it! That's the plan for OSIRIS-REx, a NASA spacecraft that will approach the asteroid Bennu in 2018. The collection will be done with an instrument on board called the...

What's with all these shapes? Let's practice assigning hybridization, electron-domain geometry, and molecular geometry. Octahedral! Tetrahedral! Linear! Pyramids and see-saws and what not! Chemistry is fun, isn't it?

Now that we've made it through the periodic table, it's time to look at transition metals and the coordination compounds they can form. What types of ligands can they interact with, and how? What shapes do they make? There is so much to...

NASCAR tires don't have "air pressure" because they're filled with nitrogen. The culprit responsible for increasing tire pressure during a race is friction. Using dry nitrogen gas helps the team predict how hot the tire will get and how...

Practice REAL problems from actual past IIT/JEE exams with Professor Dave!

Our sun's adolescence was stormy—and new evidence shows that these tempests may have been just the key to seeding life as we know it on Earth.



Credit: NASA/Goddard/Genna




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For this one we will need to understand the basics about Bronsted-Lowry acid-base reactions, and we also should be able to gauge the stability of various potential conjugate bases.

Practice REAL problems from actual past IIT/JEE exams with Professor Dave!

Who couldn't use a little practice balancing equations? If you've seen my tutorial outlining how to do this, then you're ready for four rapid fire examples to make sure you're ready to do this on your own. Give them a shot!

Practice REAL problems from actual past IIT/JEE exams with Professor Dave!

Purine Catabolism

Practice REAL problems from actual past IIT/JEE exams with Professor Dave!