Curated Video
How Satellite Energy and Speed Depend on Orbit Radius
Explore how a satellite’s kinetic and potential energy change as it orbits Earth—yet its total mechanical energy stays constant. Learn why speed depends solely on orbital radius, why mass doesn’t matter, and how all this ties into...
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What If You Fell Through the Earth? | Shell Theorem, Gravity Train & 42-Minute Tunnel Explained
Explore what happens if you fall straight through Earth—using Newton’s Shell Theorem, simple harmonic motion, and real gravitational data. Understand why every straight tunnel gives the same 42-minute trip, and how gravity behaves inside...
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Pope takes a tumble while celebrating mass in Poland
Pontiff quickly recovers and continues ceremony
Curated Video
How to Draw the Head Shape & Facial Features in Manga
Howcast - Learn how to draw a manga head shape and facial features from art instructor Chris Hart in this Howcast video.
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How to Get Sexy Hair
Howcast - You have the right clothes and you've mastered the sexy walk. Now top it all off with a thick, gorgeous mass of sexy, natural-looking hair.
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How to Celebrate the Day of the Dead
Howcast - The Day of the Dead has been celebrated in Mexico since pre-Columbian times. Here's how to remember your lost loved ones in a joyful, respectful way.
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What Does a Testicular Cancer Lump Look Like?
Howcast - Learn what a testicular cancer lump looks like in this Howcast video.
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How to Do a Testicular Cancer Self-Exam
Howcast - Learn how to do a testicular cancer self-exam in this Howcast video.
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Testicular Cancer Signs & Symptoms
Howcast - Learn how to recognize the signs and symptoms of testicular cancer is in this Howcast video.
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How to Understand the Drilling Layouts on a Bowling Ball
Howcast - Learn how to understand the drilling layouts on a bowling ball from former PBA touring player Mike D'Ambrosio in this Howcast bowling video.
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How to Do the "Jump Masse" Advanced Pool Trick Shot
Howcast -Learn how to make the "Jump Masse" shot from pool trick shot champion Andy Segal in this Howcast video.
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How To Find Molar Mass
The molar mass of a chemical compound is the mass, in grams, of 1 mole of the substance.
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Some of the Males of the This Animal Can Weigh More Than 2,000 Pounds
Males can weigh more than 2,000 pounds!
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Russian military a 'bit more of a paper tiger' than initially thought: former Canadian special forces officer
A retired former JTF2 officer says Russia's invasion of Ukraine so far shows an 'utterly inept command and control of the military operation.' 'The vaunted Russian military may not be as invincible as we've believed for a number of...
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James Webb Space Telescope Amazing View Of Protostar Explained By NASA
Travel to James Webb Space Telescope's NIRCam and MIRI instrument views of protostar L1527. The protostar is about 100,000 years old. Credit: NASA Goddard Space Flight Center Paul Morris: Lead Producer Thaddeus Cesari: Script Dr....
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Why the Solar System Is the Rarest (Not Because of the Earth)
There are three types of solar systems in the universe: ordered, anti-ordered and mixed. Anti-ordered systems are those where large planets are closer to the star and become smaller as they move away. In mixed systems, the planets are...
Curated Video
Solve problems involving mass
Pupil outcome: I can solve problems involving mass. Key learning points: - Visualising a word problem helps us see the mathematics. - Word problems can be represented as a bar model by identifying the parts and the whole. - The bar model...
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Converting units of mass and capacity
Pupil outcome: I can use knowledge of multiplication and division by 10, 100, 1,000 to convert units of mass and capacity. Key learning points: - There are 1,000 ml in 1 l - There are 1.000 g in 1 kg - There are 10 dl in 1 l - There are...
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Mass can be measured in grams and kilograms
Pupil outcome: I can describe the mass of a kilogram and a gram, and choose which unit might be best to measure different masses. Key learning points: - Mass is measured in grams and kilograms. - 1 kg is about the mass of a laptop or a...
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Measure mass in whole kilograms and grams
Pupil outcome: I can use whole kilograms and grams to measure the mass of objects. Key learning points: - 1 kg is equivalent to 1000 g. - The mass of heavy objects can be given in whole kilograms and grams. - We can use our knowledge of...
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Explain what volume is in a range of contexts
Pupil outcome: I can explain what volume is in a range of contexts. Key learning points: - Volume is the amount of space that an object takes up. - Objects with the same volume do not always have the same mass.
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Compare and describe measurements involving mass and capacity
Pupil outcome: I can compare and describe measurements involving mass and capacity. Key learning points: - A change in mass or capacity can be described multiplicatively. - The sentence 'The __________ is ___ times the...
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Comparing and estimating mass and volume
Pupil outcome: I can compare objects with ones I know to estimate mass and volume. Key learning points: - The size of something does not determine how much mass (or matter) an object has. - Taller containers do not always hold a greater...
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Become familiar with scales with different intervals when measuring in grams
Pupil outcome: I can become familiar with scales with different intervals when measuring in grams. Key learning points: - The mass of objects can be measured in grams. - Different scales can be marked with different intervals. - The mass...