The video explains the life cycle of a star, starting from a nebula, gravitational pull forming a protostar, the process of nuclear fusion, formation of a main sequence star, production of elements through fusion, expansion of a main...

Paul Andersen explains how biogeochemical cycling is used to move nutrients from the environment into living material and back again. He explains the water cycle, the carbon cycle, the nitrogen cycle and the phosphorus cycle. He also...

Upon viewing the Water, Water, Everywhere video series, students will be able to do the following: List some of the ways they use water everyday in their lives. Describe why water is important to plants and animals. Explain the...

Lesson on the Cori cycle, introducing the importance and purpose of the Cori cycle and discussing how the Cori cycle can recycle lactic acid, produced from anaerobic metabolism in skeletal muscle, in the liver to form glucose through...

When we discussed basic information regarding homogeneous and heterogeneous catalysis, we mentioned hydrogenation of alkenes in both of these contexts. Now let's get more specific and describe the mechanism of this precise catalysis in...

An animation showing the life cycle of a star. Everything from the interstellar space, Interstellar clouds, pressure waves, protostars and protoplanets, the Hydrostatic equilibrium and at last the collapse of a star. Animated in virtual...

We've learned how stars form, and we've gone over some different types of stars, like main sequence stars, red giants, and white dwarfs. But a star will move between these categories over its lifetime. How does that happen, exactly? And...

In this video Paul Andersen explains how the chloroplast in plants harnesses power from the Sun to form high energy molecules like glucose. The structure of a chloroplast as well as a brief discussion of the light reaction and Calvin...

Afterschool Universe is an out-of-school-time astronomy program for middle school students that explores basic astronomy concepts through engaging hands-on activities and then takes participants on a journey through the Universe...

Our Sun is the only star close enough to be observed in detail. From tracking solar activity to analyzing its chemical makeup, astronomers are eager to understand the Sun's cycles and its potential effects on satellites and the power...

Paul Andersen covers the processes of aerobic and anaerobic cellular respiration. He starts with a brief description of the two processes. He then describes the important parts of the mitochondria. He explains how energy is...

Parodying the classic sea shanty "The Wellerman," “The Solar Wind: A Heliophysics Sea Shanty” illuminates one of the primary connections between...

How climatologists use ice cores, cylindrical cones of ice drilled from glaciers, to reveal Earth's historical cycles of climate change. Earth Science - Human Impacts - Learning Points. The Earth has natural, long cycles of climate. The...

NASA scientists have revealed the lunar soil inside shadowy craters is rich in useful materials, that the moon is chemically active, and that it also has a water cycle. The Lunar Reconnaissance Orbiter, by observing the impact of the...

Deep in the ocean, fluffy bits of organic matter fall like snow. But this marine snow isn’t just pretty; it’s an essential part of our ocean food webs and our global climate!

Here, we will see how two forms of arsenic, arsenate and arsenote, disrupt energy metabolism via glycolysis and the TCA cycle, respectively.

What are the characteristics of water? Explain the water cycle?<br/>
Properties Of Water, Part 1

In this introductory segment, host Bobby Donohue introduces water scarcity and the need for clean drinking water. He highlights challenges faced by communities without access to clean water and discusses innovative solutions. The...

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Want to test your knowledge of photosynthesis? See if you can sing this karaoke version of The Photosynthesis Song. Bonus points if you don't even have to look at the screen! ✌SUBSCRIBE FOR MORE VIDEOSf='http://bit.ly/2F48qzK'...

Follow me!href='https://twitter.com/DoodleSci' target='_blank' rel='nofollow'>me! Doodle Science teaches you high school physics in a less boring way in almost no time! GCSE Science Script: Stars initially form from clouds of dust...

Water covers over 70% of the Earth, cycling from the oceans and rivers to the clouds and back again. It even makes up about 60% of our bodies. But in the rest of the solar system, liquid water is almost impossible to find. So how did our...

In general, a star’s size will determine its final destiny. Some stars fizzle out, while others explode, and what seals their fate may come down to a curious, cannibalistic process happening inside their cores!

We just learned about hydrogenation of alkenes via homogeneous catalysis, and the complicated catalytic cycles that are involved. But there is an additional aspect that we need to discuss. Whenever possible, we want to be able to employ...