Marc "Zeke" Kossover

Do make sure the area is well-ventillated. This demonstration once set off my carbon monoxide alarm.

Not sure what you're using as a source, but we've just started using these single color flashlights. a.co/d/hmkqHrH

A little harder to make, but slightly more advanced fidget spinner lazy Susan. docs.google.com/document/d/1...

Reminds me a bit at the beginning of Iain M. Banks's Transitions.

AQA GCSE Physics looks at ‘energy imbalance’ for Earth. This graphic is fabulous for reinforcing their learning: red line up, as T is rising. Black line up, as GHG levels higher and dimming reduced (shipping emissions cleaner). Stark. No equilibrium in sight. #IteachPhysics #TeachSDGs

2025 International Day of Women and Girls in Science In 2015, the United Nations General Assembly declared 11 February as the International Day of Women and Girls in Science. On 11 February 2025, we will celebrate its 10th anniversary together at UNESCO...

Tuesday Feb 11, 2025 is the 10th annual International Day of Women and Girls in Science. 👩‍🔬 🧪 ⚛️ 🔭 🎢 🍎 🥽

I love this experiment and have done it with students many times. Something unusual happens if you put a microphone inside the bell jar while at vacuum. For example, if you can get your phone to auto answer while under vacuum, it isn't as quiet as might expect.

#ITeachPhysics #ITeachBiology #ITeachChemistry #ITeachEnvironmentalScience #APES

Summer Institute for Teachers | Exploratorium Three-week workshop for secondary science teachers.

Are you a middle or high school science teacher? Want the best PD at the best science museum in the world? Want to get paid a $2500 stipend?

#ITeachPhysics #ITeachAstronomy

Equation of Time The difference between the time measured by the Sun and the time measured by our clocks is known as the equation of time.

For folks in the Northern Hemisphere, yesterday had the earliest sunset. Sunsets are starting to get later, even though the amount of daylight will continue to shrink until December 21. Confused? Blame gravity. www.timeanddate.com/astronomy/eq...

Circles of Magnetism | Exploratorium Make a magnetic field that's stronger than Earth's.

We also have a design for a classroom version. Works great with just D batteries. www.exploratorium.edu/snacks/circl...

Mind the Magnetic Gap | Exploratorium Magnets can affect things that aren’t magnetic.

Making your own version isn't too hard, and it's adjustable. www.exploratorium.edu/snacks/mind-...

🎢 Darek Dewey has some of the most surprising and creative demos and I hope to see him here soon! "No matter what angle you drop the rod at it always ends up straight at the bottom of brachistochrone curves."

Another example for my second years doing a topic on light. Love it!

🎢 Brilliant demonstration from @cossettej.bsky.social of the relationship between normal force and friction force on a car.

You can also use a Hot Hands heat pack, but it's slower.

The article on hydrogen powered cars was kind of fast and loose with the facts. Describing gasoline and hydrogen as equally dangerous is not true. Gasoline explodes with mixtures between 1.2% and 7.1%, while hydrogen ignites in ranges of 4% to 74%.

Alas, I live in California, but I'll be in London on holiday next week! I'm retired from the classroom, but I still design science activities for teachers, and facilitate workshops for teachers. And like you, I do science shows and have even worked with magicians.

Great collection of videos of physics demonstrations with good explanations and instructions to do it yourself.

Love your work!