Science

Welcome to Little Gonerby's first

Science Club

In this club we are going to be doing some cool fun experiments and hopefully work out why things happen the way they do. 

 

In our first week we started to make a volcano which will explode during our last session and we also looked at some super goo made out of cornflour. We found it weird that it looked like a liquid then when we lifted it up it went hard. We wondered why this happened and why the glue we used for the volcano (pva glue and water) didn't do the same thing.

Us busy making the volcano and exploring the super goo.

Balloons Balloons Balloons

 

This week we used balloons in different ways. We thought about whether a balloon was heavier if it was empty or when it had air in it and were surprised by the result. Can you see the photo of Mrs. McDonnell holding up the balloon scales we made?  When the air is in the balloon we found out that it is compressed which makes it slightly denser than the air around it so it it slightly heavier. 

Then I challenged Mrs. McDonnell to blow up a balloon without putting any air into it. She thought about it and came up with a great idea. She mixed yeast and sugar in warm water and then put it into a bottle and put the balloon over the end of the bottle. After about 10 minutes the balloon started to inflate. We guessed that Mrs. McDonnel must make bread at home and used her skills from this to fill the balloon.

Our final experiment was to make a balloon fly.  We blew up our balloons and attached a straw to the side of them. We threaded some string through the straw and pulled it tight and then let the balloon go. We had varying successes but we did make most balloons fly along the string. We found that the air is under pressure inside the balloon  so when we took the clip off the end the balloon it tries to return to its original shape and as the air escapes through the neck of the balloon  it is pushed in the opposite direction.

As you can see from the photos, there was lots of laughter and good fun was had by all. (Take a look in the background of the photos to see which other members of staff want to join us in Science Club.)

 

Week 2 - Making a balloon fly, a balloon fill with air and weighing a balloon

 Fun with water. 

This week we had a look at objects to see if they could sink or swim.

Our first experiment this week was to drop some raisins into a tall cup of lemonade. This was fun because when the air bubbles in the lemonade attached themselves to the raisins it caused them to float to the top of the lemonade and then when the bubbles popped the raisins sank to the bottom again until more bubbles attached themselves and the whole process was repeated.

We tried to replicate the Cartesian Diver experiment this week with mixed results whereby air is trapped in a ‘diver’ and he is put into a bottle of water. When the bottle is squeezed everything inside is put under increased pressure and so the diver will move up and down in the bottle. We then tried to make a pen lid float and we found that if we added some plasticine to the bottom of the pen lid then we could make it stay upright and float.  We worked out that it would float if the pen lid stayed upright and we trapped air inside it as we put it into the water. It was interesting to see that we didn’t need to put anything over the bottom of the lid to trap the air but by placing it carefully into the water we could trap the air.

We then tried to make boats out of plasticine and experimented with shape to see what the best shape to float was.

Then we took a jug of water and guessed whether eggs would sink or float. One person very cleverly asked if the egg was old or new because he knew that old eggs would float. Our eggs had been bought that morning so they were fresh and went straight to the bottom of the jug. We tried to think how we could make the eggs float so we tried adding salt to the water and mixed it around until it dissolved. Our eggs then floated.

One of our year 1 boys had a great explanation for this “The egg is too heavy for the water to carry it but when we add the salt to the water it gives the water more strength and it can carry the egg”.

Water Water everywhere...

Seeing Sound

This week we had fun trying to see sound. We made a drum with a mixing bowl and some cling film and put some lentils on top. Our challenge was to make the lentils jump but without touching the bowl or the lentils. We discovered that if we banged two plastic bottles together over the lentils they would start to jump. The bottles banging together caused waves in the air and that made the cling film vibrate which bounced the lentils up and down.

We then had to make a feather move by using an empty crisp tin which had a hole drilled in the bottom of it. Again we couldn't touch the feather, but we found out that if we banged the bottom of the tin the sound waves passed through the tube and out of the hole at the bottom of the tin and this moved the feather.

We were very noisy but we had good fun!

We ended with a bang!

(Well maybe a fizz)

For our last session we decided to see if we could make paper fly without making it into an aeroplane. We cut and folded and made some paper spinners which we took outside to try out. It was a little bit breezy and some of our spinners flew up high and landed on the roof. One disappeared over the roof of the school and we never saw it again.

Then we made our volcanos explode. We mixed bicarbonate of soda with food colouring and then poured on some vinegar. If you watch the video below you will see how our volcanos exploded.

Thank you to all the children who came to science club for their interest and willingness to try doing things they weren't necessarily comfortable with. We all had a great time.smileyno