Blow up balloons
When we lit the balloons with a lighter the rubber melted causing th eballoons to pop.
At first it made no difference what the size of the balloon was. Even though the rubber was streched more and thinner, they all popped at around 1 second. Then we lit them with water in them. The water inside absorbed the heat from the fire, giving the balloon more time until it pops. At first [with only a tiny bit of water in] the balloon lasted 5 seconds. The timings quickly escalated with th e next two balloons. Then [with a lot of water] it lasted 102 seconds.
Pennies in jar.
We completed an experiment where we put pennies in a jar to see how many pennies it would take to over flo the jar filled to the brim with water. We went around the table to drop pennies in - we estimated that between 1 and 22 pennies. Unfortunately we were well off! In total we placed in 171 pennies, 31 2ps, 65 5ps which in total added up to £5.43. As we placed money in the jar, the water curved which is called a 'meniscus'. The experiment was all about surface tension.
Ball of electricity
Our first experiment from Sam Simple Science was where everyone stood in a circle and held hands. We had a special ball that was a buzzer to complete the circuit - when everyone was touching hands the buzzer made a loud noise. Corey released one hand from the circuit and by touching Sienna's nose he created a switch.
Vinegar circuits
Firstly we were given 5 nails and 5 pieces of copper wire. We had to bend the copper wire around the nail and leave a right angle at the end. Then we had to pour vinegar into 6 ice cube trays - half full. Once we had the vinegar and the nails, we needed to place the nails inside the trays ensuring that one nail and one piece of the copper wire was in each tray (they didn't need to touch because the vinegar was the conductor of electricty in our circuit). Anne (from Sam Simple Science) gave us an LED light - we had to identify the long and short legs - we bent the legs and placed then in the vinegar to complete the circuit. When we completed the circuit accurately the LED light lit up.
Playdoh circuits
We made different circuits with a battery, a wire, playdoh and an LED light. First we had to split the playdoh into 2 balls, then we got the wire and battery (once attached) and placed a wire into each ball of playdoh. After that we took our LED light and spearated the legs - the long leg went in the piece of playdoh with the red wire - if the legs were the wrong way around, then the light didn't work.
All of the elements made a circuit when put together.
Our experiment continued with us making more circuits using playdoh which included parallel circuits.
Stars
Anne provided us with an LED light (LED stands for Light Emitting Diode), 3D printed stars, tape, and a battery. We were allowed to chose the colour we wanted, they were all colured coded When we put the star over the LED light it shone up - yellow was the brightest.
2p coin
This experiment we completed with all of KS2 - we filled half a jar with water, filled the rest with vinegar and then added in some salt. Each group had 2p coins and took it in turns to dip them in the jar. The dirty coins got cleaned. Everybody chose a time for how long the coin was put in the jar - the longest was 90 seconds. The material that cleaned the coin was vinegar - which is an acid. Copper oxide is dissolved by the acid (vinegar).
Exploding bottle bomb
We got an empty, transparent bottle and poured in half a bottle of vinegar. Then added bicarbonate of soda. After that we put the lid on the bottle [bad idea]. We then added mints and put the lid back on [bad idea]. We shook it. FAIL! It failed because the built-up gas escaped when we took the lid off. The second trial was more sucsessful.We did all the same steps as last time apart from that we shook it straight after we added the mints an dpput the lid on after. We then shook the bottle and took the lid off, it instanly flew half way across the playground. SUCCSES! It was a lot of fun. The science behind it was the acid [in the vinegar] reacting to the bicarbonate of soda and mints causing an explosion.
Ingredients:
vinegar
bicarbonate of soda
mints
transparant bottle.
