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"The Spangler Effect is a new YouTube channel from Steve Spangler Science. Unlike his popular Sick Science videos which are no more than short demonstrations of science experiments students and parents can do at home, The Spangler Effect videos offer longer (15 minutes or so) explanations of science experiments. The Spangler Effect videos explain the science of do-it-yourself experiments and how you can recreate those experiments at home or in your classroom"

A quick mini-experiment that can help kids to learn about the density of air and the impact that temperature has on density. Similar to the balloon/bottle experiment that I already do in class.

"Easy science experiments and science fair project ideas that make learning fun."

This NASA documentary celebrates 50 years of extravehicular activity (EVA) or spacewalks that began with the first two EVAs conducted by Russian Alexey Leonov in March 1965 and American astronaut Edward White in June 1965 . The documentary features interviews with NASA Administrator and astronaut, Charles Bolden, NASA Deputy Administrator and spacesuit designer, Dava Newman, as well as other astronauts, engineers, technicians, managers and luminaries of spacewalk history. They share their personal stories and thoughts that cover the full EVA experience-- from the early spacewalking experiences, to spacesuit manufacturing, to modern day spacewalks aboard the International Space Station as well as what the future holds for humans working on a tether in space. "Suit Up," is narrated by actor and fan of space exploration Jon Cryer. Cryer recently traveled to Star City, NASA Headquarters and the Johnson Space Center to film an upcoming Travel Channel documentary series.

A REALLY cool experiment for showing kids the properties of reflection and refraction that uses Pyrex beakers, vegetable oil and Pyrex test tubes.

Our resident science fiends will give the YouTube audience their big science treat each week with a live experiment where you can find out how to make food dance, power a light bulb with household objects and blow mega smoke rings!

National Geographic Channel is taking viewers around the world-literally-in this spectacular two-hour television event broadcasting LIVE from the International Space Station (ISS) and Mission Control in Houston, Texas. Made in collaboration with NASA, we'll go into orbit with astronauts Rick Mastracchio and Koichi Wakata as they fly at 17,500 mph nearly 250 miles above the earth's surface on the International Space Station, while astronaut Mike Massimino joins host Soledad O'Brien on the ground at Mission Control in Houston. From space, Mastracchio and Wakata will give viewers a fully guided tour, showing us how they live for months in microgravity. They'll conduct never-before-broadcast experiments that demonstrate the real-world value of the science conducted on the floating laboratory. Plus get ready for stunning shots of Earth, from sunset and sunrise, to city lights and green aurora, to lightning storms and shooting stars. You've never seen our planet like this before.

A Steve Spangler video experiment that might be good for teaching students about the Law of Conservation of Energy. Involves making a solar powered oven to convert light energy to heat energy to cook S'mores.

The next time you're eating a big bowl of breakfast cereal, take a closer look at the ingredients. You'll find that it contains more than just wheat and corn. Look closely and you might find iron in your cereal... you know, the metal... the stuff used to make nails. Here's an experiment that proves you're eating iron for breakfast.

"This is actually very similar to what happens when popcorn pops or when you try to microwave a marshmallow. Those air bubbles in the soap (or the popcorn kernels or the marshmallow) contain water. Water is also caught up in the matrix of the soap itself. The expanding effect is caused when the water is heated by the microwave. The water vaporizes, forming bubbles, and the heat causes trapped air to expand. Likewise, the heat causes the soap itself to soften and become pliable. This effect is actually a demonstration of Charles' Law. Charles' Law states that as the temperature of a gas increases, so does its volume. When the soap is heated, the molecules of air in the soap move quickly, causing them to move far away from each other. This causes the soap to puff up and expand to an enormous size. Other brands of soap without whipped air tend to heat up and melt in the microwave."

Toward the end of his EPA career, Hudnell led a nine-agency effort to address fresh-water algal blooms, he said. The Interagency Symposium on Cyanobacteria Harmful Algal Blooms printed an 885-page report, now hosted at EPA.gov. The report linked algae growth to an increase in nutrient pollution and temperatures and the decline of algae-eating organisms.

In 2007, "that's when I decided, 'The agency's not going to do anything about this,' and I decided I could do better without the agency," he said. "At the time, I decided the best thing out there was the solar-powered circulators."

Circulation technology, he believes, is the most promising idea among the "in-lake" approaches. By cycling water up from the depths, he said, many municipalities have managed to kill off algae blooms, even in heavily affected sewage ponds.

The tactic may work by confusing the algae about its depth in the water, Hudnell said, or by making them more vulnerable to algae-attacking viruses. In either case, he said, he has seen results.

The future of manned spaceflight is coming into focus. Whether it's through NASA's Orion program, its partnerships with private companies or in the form of the quick, space-immersion experiences that Virgin Galatic's SpaceshipTwo spaceships are soon to offer.

Billionaire Richard Branson recently placed a full-scale replica of his spaceship on the deck of the Intrepid Air and Space Museum in New York City. You can see it for yourself in the gallery above and Vine video below.

"We exist to make the capability of human travel beyond our solar system a reality within the next 100 years. We unreservedly dedicate ourselves to identifying and pushing the radical leaps in knowledge and technology needed to achieve interstellar flight, while pioneering and transforming breakthrough applications that enhance the quality of life for all on Earth. We actively seek to include the broadest swath of people and human experience in understanding, shaping and implementing this global aspiration. Taking up this task ignites not only our imagination, but the undeniable human need to push ourselves to accomplishments greater than any single individual."

This could be a fun phase change experiment to try. Dry ice is frozen CO2 -- which needs to stay at a ridiculously low temperature to stay frozen. When you put it in the balloon, it changes phases to a gas -- which is less dense and expands, causing the balloon to fill.

"There are just some things that are synonymous with "summertime snacks," and we can't think of a summer snack we enjoy quite as much as s'mores. But what would you do if you weren't allowed to have a fire or just didn't have the tools necessary for a fire? We came up with a pretty neat way to harness the heat and energy of the sun to create a solar powered cooker that makes a delicious batch of s'mores without a fire!"

"When you hear about a volcano erupting, what do you think is going on? If you're like us, you think of red hot chunks of rock being hurled thousands of feet in the air, flows of liquid magma, and plumes of smoke. That's not always the case. Some volcanoes erupt underwater and their smoking hot by-products are immediately cooled. With the Storm in a Cup, you can see what happens underwater on a smaller, safer scale."

"We love to see what microwaves do to common household items. We've shrunk potato chip bags and turned Ivory Soap into a fluffy soap souffle. What more could we want to do? We heard that it's possible to actually make a lightbulb light-up if you do it right. And sure enough, we figured it out."

Bring science to life at the touch of a fingertip. Download the latest iBooks Textbooks from KQED! Explore STEM topics and careers through real-world examples. Designed to engage learners through a blend of high-quality media, interactive elements and informative text, the books and accompanying iTunes U courses offer rich learning experiences both in and out of the classroom.

Find out why NASA astronaut Dr. Mae Jemison wanted to go into space in this profile from NOVA's The Secret Life of Scientists and Engineers.

A physician, a chemical engineer, a teacher, a dancer, and the first African American woman astronaut to go to space, Dr. Jemison launched into orbit on September 12, 1992 as a STS-47 Mission Specialist for Space Shuttle Endeavor. During the eight day mission, she and the STS-47 crew conducted 44 life science and materials processing experiments.

ESA astronaut Alexander Gerst performs a demonstration of how ESA's Rosetta mission will attempt to put a lander, called 'Philae' on the surface of comet 67P/Churyumov-Gerasimenko.

Alexander narrates the story of the Rosetta mission and performs a demonstration that visualises the difficulties of landing on an object that has little gravitational pull. Using the weightless environment of the Space Station, Alexander attempts to land 'Philae' (an ear plug) onto the surface of the 'comet' (an inactive SPHERES robot) with increasing levels of difficulty: a rotating comet that is not moving to one that is both rotating and moving.

This video is one of the six experiments and demonstrations in the Flying Classroom, Alexander will use small items to demonstrate several principles of physics in microgravity to students aged 10-17 years.

The Rosetta mission's lander, Philae, will be deployed on 12 November at 08:35 GMT/09:35 CET from a distance of 22.5 km from the centre of the comet. It will land about seven hours later, with confirmation expected to arrive at Earth at around 16:00 GMT/17:00 CET.