What do we do in our spare time you ask? Oh, nothing interesting really.
What you see here is 4th year Veronika Kottish, playing with gun cotton (please note, all safety precautions were taken and do not try this at home). What is gun cotton, you may ask. Before answering this question, we first need to understand what regular ol' cotton is made of.
Cotton is made of a natural polymer called cellulose. Think: a long chain of sugar molecules, called glucose, tied together. These long chains are responsible for the properties that cotton has. Now, these glucose molecules have alcohol groups on them (-OH) which can be functionalized/altered with some basic chemistry.
Here's where it gets cool: by stirring cotton in Nitric acid (very dangerous stuff, please don't try this at home), we can change the alcohols on glucose to nitrate groups (-NO3). Nitrate groups are explosive and now you just need a bit of heat/energy to make your gun cotton explode!
What did you think of this explanation? Comment below and let us know!
Summer planning time! Hopefully your schools will have schemes of work or teaching manuals but if, this is how I medium term plan.
1. Look at the objectives for the topic from the NC or specification (all available online).
2. Create a mind map connecting the ideas and forming links. This makes it easier to plan an order of lessons.
3. Outline each lesson. Often these aren't in the order of a textbook or even teaching manual (a lot of educational resources aren't made by teachers so don't flow well for instructional learning)
4. Start to think up some lesson ideas.
5. Begin lesson planning, I always plan in chunk so that the lessons are varied and flow well. #summerplanning#teachersofinstagram#bts#teachersfollowteachers#scienceteacher#secondaeyteacher#ukteachers
Major #throwback picture from my application video for Apple Distinguished Educator. 👩🏫⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
Since the invention of smartphones, laptops, and other portable electronic devices, scientists have been saying that the blue light emitted from the LED screens of these devices harm our eyes.
So how is blue light destroying your eyes? Blue light naturally exists in the 380–500 nm range. However, the blue light that is emitted from most portable electronic devices operates in the 415-455 nm range. This range is known as high-energy visible light (HEV). To give you a point of reference, we wear sunglasses to block light in this range. However, our computer screens aren't made to filter these rays.
A paper published in Scientific Reports states that blue light encourages the death of photoreceptor cells in your eye. The death of these non-regenerative cells can lead to early onset of Advanced Macular Degeneration, a disease that can only be corrected through surgery and failure to do so may lead to permanent loss of vision. The effect of blue light is even more detrimental to younger children, as their corneas have yet to be fully developed.
So here's what you can do to protect yourself:
💻Install Flux on your computer. I’ve set mine so it knows when my bed time is and when I wake up, so it emits red light closer to my bed time and emits blue during the day.
📱Make sure that you have screen dimming programs installed on your phones: I use Night Shift for my iPhone.
👓Wear preventative glasses with HEV filter.
While all of these things are great in alleviating the effects of HEV, prevention is still the best way to protect your eyes. Stop using your electronic devices and give your eyes a rest once in awhile!
Any other #stemteachers out there with random experiments growing in their window sills at home? You can take the #scienceteacher out of the classroom but you can’t take the curiosity out of the cat! Am I right? That’s a quote right?
These are green onions I picked up at the grocery store a couple of weeks ago and I’m regrowing them! These guys are super simple to regrow and take off in *literally* hours. If you like to have fresh onions in hand, you gotta regrow some of these. Poke some toothpicks just barely into the side of the bulb top and submerge in water just to the base of the root shoots. Change the water every other day. .
One of the most important things I want to know from #stem teachers is: how are you living a curious life? What experiments and trials do you run in your own home? Do you grow things? Sew? Cook? Build? Tinker? Your hobbies can be a great outlet to share with students about how science and engineering work in your life. Not to mention, there’s something exciting about venturing into the “unknown”... get out there and play!
This pen is amazing. I think this will be a great toy for kids and a great teaching tool. What do you think? Follow @dankscience7 and Check out my link in my bio for cool gadgets. I update it every couple of weeks enjoy😁. .............credit @insiderscience
💪Lifting weights causes increases in muscle strength and size. We call increases in muscle size muscle hypertrophy. This simply means that the individual muscle fibres have increased in width or length.⠀
🤔How does this happen?⠀
👍There is a three step process by which hypertrophy is initiated.⠀
🏋️♀️You lift a heavy weight and sensors in your muscles detect this due to the increased amount of tension on the muscle.⠀
🗣️The sensors send out signals to notify other parts of the body that this muscle has lifted something heavy.⠀
👨🔧The signals increase the rate of muscle protein synthesis (aka the rate at which muscle tissue is built). Provided that there is enough available protein within the body new muscle tissue is built.⠀
👨💻Head over to my guest article for more information on the science of muscle hypertrophy at @thepowercoupleuks's blog aka @reganphillips_pt and @vivi_bks.⠀
➡️Link in bio!