Ask someone what they remember from their science lessons at school and more than likely they'll recall the time that the tiniest lump of sodium whizzed around in a trough of water or the loud bang of a hydrogen & oxygen balloon exploding or the fantastic effect of dry ice placed in a large beaker of water with a couple of squirts of universal indicator, and if they are the mischevious type (hey wasn't that all of us as teenagers!) using the bunsen flame to melt the top of their biros when their teacher wasn't looking!
Students learn when they are involved, engaged and in a safe environment with positive learning experiences."Tell me and I'll forget
Show me and I may remember
Involve me and I'll understand"
Chinese Proverb
Involve me and I'll understand"
Chinese Proverb
Health and Safety in most countries have clamped down on safety in school laboratories, as a result we are really limited with what "out of the ordinary but relevant" experiments that we can do in the classroom. See below some of my favourite flash, bang, wow attention grabbers.
I'd suggest letting your students carry out the experiments that are legal in your workplace, demo others if more appropriate while getting your students to video them using their mobile phones or laptops. Students can then describe and explain the science concepts behind the experiments by adding text to images using Macromedia Fireworks, editing the videos in Microsoft Movie Maker and adding audio using Audacity or perhaps using Microsoft Powerpoint to type text alongside images or video clips. I will post up another day with numerous recommended Science and Chemistry videos and interactive activities.
But first the disclaimer...I take absolutely no responsibility nor liability for death or injury that results to a person or persons who demonstrate or observe any of the reactions below or elsewhere on my blog pages. You must consult the Health and Safety guidelines for your own workplace and country and carry out your own risk assessment before attempting any of the experiments.
Never, ever risk your students safety.
to view a full screen image of the video rightclick, watch on Youtube | click on the name to download a detailed teacher information sheet | here is a brief description and link for the demonstration/experiment |
Whoosh bottle | A fast, furious reaction links to: combusion, organic | |
Firewriting | Very easy to do, good for all ages links to: combustion, redox | |
Fake blood | A wonderful, dramatic effect links to: redox, respiratory system | |
Supercooling water | Do, definitely try this at home links to: states of matter, heat changes | |
Ammonia fountain | Produces a little pink fountain links to: acids & bases | |
Errie green glow | be sure the lights are out, a lovely green glow is produced. links to: combustion, organic | |
Howling jelly baby | highly dangerous reaction, should only be carried out by a qualified Chemist. links to: redox, sound | |
The copper cycle | What a neat little experiment, really fab! links to: redox, precipitation, neutralisation, thermal decomposition | |
Thermite reaction | highly dangerous exothermic reaction, should only be carried out by a qualified Chemist links to: redox, reactivity series | |
colourful glass beads are produced links to: transition metals | ||
Rainbow tornado | rainbow colours with a tornado effect will certainly hold your students attention links to: acids & bases | |
Balancing trick | Persevere with this one, it's worth it, also a great party trick. links to: forces, moments | |
Hot air balloon | This works brilliantly, launch well away from main roads. links: convection | |
Elephants toothpaste | certainly has the wow factor! you could also use MnO2 as the catalyst links to: states of matter, rates of reactions | |
Cannon fire | little snap, crackle and pops will go off links to: redox | |
Paper kettle | a fab experiment, boil water in your paper kettle with a bunsen, students won't believe that the paper doesn't go on fire! links to: convection | |
turn the lights off and watch this illuminous blue glow, mesmerising! links to: rate of reaction | ||
Turning copper into gold | Act as an alchemist as you turn copper to silver (zinc coating) and then gold (brass) links to: redox, periodic table | |
Coke fountain | stand well back, this is loads of fun, another one to try at home links to: forces | |
The wine party | this demonstrates more redox reactions links to: redox | |
Burning money | a good attention grabber at the beginning of a topic links to: combustion, organic | |
Slime | this is a fun experiment that can extend into an investigation as students carry out tests on their slime links to: organic, investigating | |
Volcano reaction | highly dangerous redox reaction, should only be carried out by a qualified Chemist. links to: redox, geology | |
Oscillating Briggs-Rauscher reaction | students observe not just 1 colour change but ongoing colour changes for a few minutes links to: observations, rate of reactions | |
Matchstick rocket | another one to try at home, once perfected this works well links to: forces | |
Rainbow flames | another good lesson starter links to: flames tests, observations | |
Extremely cold reaction | amaze your students as you lift some wood with some cold water links to: endothermic reactions | |
another projectile launcher to try at home links to: forces | ||
Black snake | this is a good into to carbon chemistry links to: elements & compounds, organic | |
Polymer ball | a good activity at the end of a few lessons on polymers links: organic | |
Ferrofluid | You absolutely must purchase this fluid online, has to be seen to be believed links to: elements, magnetism |
For additional recommended reading see the following resources
Chris Schrempp, "Bangs, flashes and explosions" demonstration manual and dvd's
RSC (Royal Society of Chemistry), "Surely that's banned", 2005
CLEAPSS School Science Service, "We don't do that. it's not safe anymore" 2004
Journal of Chemical Education, Chemistry comes alive
So without so much as a sizzle, pop or a bang I'm out of here for two weeks holidays in the sun and surf. Happy Easter everyone!
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