Category Archives: Science

Making Burglar Alarms!

Bluebirds, had a special visitor in Science today, who explained how the fire and burglar alarms work in school. We talked about circuits and linked our previous learning of electricity Mr Evans made a circuit for us and talked about conductors and insulators. We predicted whether items such as a paper clip, peg, staples, magnet, scissors, ruler and a paintbrush would act as a conductor and create a circuit, thus setting the buzzer alarm off. We recorded our results.

Understanding electrical circuits

Today, Bluebirds took advantage of the sunshine and stood out on the playground to create a circuit together! Esmay was the battery, Jani was the buzzer and everyone else were electrons. We walked around holding hands to make a circuit (moving like electricity would). Jani had to look out for an adult letting go and making a break in the circuit which would stop the buzzer working.

Back in the classroom, the children consolidated their knowledge linking back to when they made circuits, to play at a buzzer game. It was great fun!

Video: Charging Balloons!

Today, Bluebirds learnt about positive and negative charges with electrons. It was very exciting as the class used balloons to collect confetti. Afterwards, the children used the balloons to make plastic rings levitate and float in the air. We felt like we were doing a magic trick!

We considered how we could collect data such as timing how long do we rub balloon with hair/wool cloth for or how m at times do we rub, how long we could keep the ring floating for, how many rings can you levitate at once and how much confetti pieces could be collected.

Video: An electrifying experience!

Bluebirds began their new topic of electricity today. Miss Timerick asked the class to think of as many things as they could they needed electricity. They thought of lots of household items and technology that needed it but forgot about things which needed batteries!

They watched a demonstration with a Van de Graaff generator. When the belt was wound up it made Mrs Johnson’s hair stand up! After, they saw metal tins blow off the top of the generator little foil balls jump around in a tube.

We talked about static electricity and energy. We learnt the metal rubbing against the belt created electricity in the metal dome. The force of the friction causes electrons transfer from one material to another. The material that has gained electrons becomes negatively charged whilst the other has become positively charged because it has lost electrons. The sparks occur when electrons move to balance the difference in charge on the atoms in the material and become neutrally charged once more.

If two objects with the same charge are brought close together they repel. This is the reason for hair standing up as the individual charged strands of hair are repelled away from the head and each other. Similarly, opposite charges attract each other and this can be seen when you rub a balloon on your hair and then bring the balloon close to your hair and the hair lifts towards the balloon.

Making ice cream

Bluebirds were like busy little elves this afternoon as they made ice cream in their Science lesson. They mixed milk, sugar and vanilla essence in a small bag and sealed it. Next they added salt to a large bag of ice and sealed the small bag inside. They massaged the mixtures for five minutes. Some needed gloves as it was a very chilly challenge!

Yummy… it was delicious!

Chromatography experiment

On Friday, whilst discussing Autumn and the leaves changing colour, Mrs Parry demonstrated how to perform chromatography to separate the colours found in leaves. Afterwards, she asked Bluebirds to be both detectives and scientists to help establish which staff member’s pen had written a note left in the staffroom, admitting they had taken the last doughnut! There were three possible suspects! The children conducted the experiment below:

The children had pens belonging to Mrs Butterworth, Miss McClelland and Mr Johnston. They had to match their ink to the one that had written the apology note to identify who had taken the cake.
Mr Johnston was found to be guilty…..the mystery was solved! Well done Bluebirds!

The children found out that Ink is not made of just one pigment (colouring stuff). To make one colour, you need several pigments and different pen brands use different mixtures of pigments. Some pigments are better at dissolving in the solvent than others. This means that when the solvent travels up the paper strip, some pigments will “follow” it to the top while others will lag behind. This way you can separate the different pigments (solutes) inside the ink.