# Experimenting with magnets: 2nd Class Room 11

Today we learned a little about magnets and how they work. We found out that they only attract certain types of metal, like iron, cobalt and nickel.

Magnets have two poles, one north and one south. Through experimentation of magnets we were able to show that opposite poles will attract, and same poles will repel each other.

We also tested the ability of magnets to work through various materials. We used paper clips and tested to see if the magnets were working through cotton, tin foil, wood, card, plastic and also water. After testing them we then recorded and discussed our results. We had a lot of fun experimenting with magnets.

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# AND gates – Boolean Logic

We were learning about Boolean Logic today. Basically it is a group of switches that are either turned ON or OFF and they in turn on a light bulb. All of the circuits we have learned about are based on these simple circuits.

We only learned about AND gates today. Check out our photos below to see the circuit we made and how AND gates work.

1) Both switches A and B are OFF. Therefore, the light is OFF.

2) Swicth A is ON (1) and Switch B is OFF (0). Therefore, the light is OFF (0).

3) Swicth A is OFF (0) and Switch B is ON (1). Therefore, the light is OFF (0).

4) Swicth A is ON(1) and Switch B is ON (1). Therefore, the light is ON (1).

Here is an AND GATE table:

 Switch A Switch B Light Off (0) Off (0) Off (0) On (1) Off (0) Off (0) Off (0) On (1) Off (0) On (1) On (1) On (1)

More useful information on Logic gates can be found at

BBC Logic Gates

Surrey Education Logic Gates

If you want to learn more about the English man who invented Boolean Logic then check out George Boole on Wikipedia. George Boole was a the first Professor of Mathematics in UCC in Cork in 1849!

# Battery Experiment Results–6th Class Room 6

Our experiment has finally finished. Our results were very surprising. The results were that the cheap battery expired after 21hrs and 30mins. The expensive battery expired after 21hrs 51 mins. And the rechargeable battery expired after 26hrs 45mins.

In our class all children’s predictions showed that each person expected the expensive battery to last the longest. However our experiment proved us wrong. The majority of children in our class predicted that the that the rechargeable battery would last for the least amount of time. However our experiment proved us wrong again and showed us the cheap battery lasted the shortest time.

You can see our class predictions on a previous blog which you can go back and see.

# 6th Class – Room 6 – Battery Experiment, Update 2

We are very surprised in 6th class at the moment with how are experiment is turning out. At 12:30pm today the light powered by the cheap battery stopped working which means it lasted for 21 hours and 30 minutes. The light bulb powered by the expensive battery stopped working at 12:51pm today which means it lasted for 21 hours and 51 minutes. The light bulb powered by the rechargeable battery is still working at the moment.

# Squishy Circuits!

Wow! It’s great to see all of those excellent posts on electrical circuits posted by the pupils in St Clare’s. It would be great if added circuit diagrams for a parallel circuit. While doing electrical circuits we always struggle with connecting the wires when we do not have any crocodile clips. Check out this really cool video clip where they conduct electricity with play doh!

Check out this website to answer your question on the difference between parallel and serial circuits. It is great to see that you have really thought about the science experiments that you did in school.

# Parallel Circuit

Yesterday in science we did work with circuits. We built a parallel circuit.We used a battery as the power supply. We then got two wires and attached them to either end of the battery. We got two bulbs and attached them to the other end of the wires. The bulbs were really bright. We also did a buzzer, it was very loud. We built a serial circuit but the bulbs and the buzzer weren’t as strong.

I’m not sure why the bulbs and the buzzer in the serial circuit weren’t as powerful  as the parallel circuit.

 Parallel

# eletrical circiuts

on Tuesday in school we tested out the serial circuit and the

parallel circuit. We found out that the parallel circuit gives

an equal amount of electricity while the serial circuit doesn’t

give an equal amount of electricity.I do not know why the

serial circuit does not give an equal electricity, so if you do