In our first week at Science club we investigated bubbles! We predicted whether or not we thought we could blow bubbles of different shapes and sizes. We then tested our predictions to see if they were correct. We had lots of fun and learnt some new things about bubbles we never knew before!
This week we have been making cornflour slime. This is a liquid that can also behave like a solid if pressure is applied. It was extremely messy and lots of fun. At the end of the session we tested the cornflour slime to see if it could protect an egg from a drop to floor. It managed to keep the egg safe from a drop of about 1.5 metres. We were very impressed!
This week we have been making our own lava lamps. We did this by using water, food colouring, oil and salt. When we mixed our ingredients together we talked about how water an oil did not mix and they were immiscible liquids. We also discussed what we could see when we poured salt into our bottle. We noticed that lots of bubbles went shooting up and down and that they traveled faster in the water than in the oil. This week we made lots of predictions and observations and attempted to give explanations. Well done scientists!
This week we looked at what would happen if we dropped some mentos into some fizzy drinks. We talked about how the 'fizz' in fizzy drinks is a gas called carbon dioxide that wants to escape as bubbles. We felt the surface of a mento and decided that it was very bumpy with lots of dimples. We then discussed what would happen if mentos were dropped into the fizzy drinks. We predicted which fizzy drink would have the biggest reaction, diet coke, coke, diet lemonade or lemonade, discussing why we thought this. Then we tested our predictions outside to see the fizzy drink eruptions. We had lots of fun this week.
This week we looked at how to clean our tarnished pennies at home using different household items. We started by stating a penny was made from copper and we talked about why we thought the pennies were dirty. Then we discussed the science bit and talked about how after a while the copper penny reacts with air to form copper oxide which makes them look dirty. Then came the cleaning. We used lemon juice, vinegar & salt, bicarbonate of soda, coke, water & soap and ketchup to try and clean our pennies. We found that vinegar & salt worked well, as did the ketchup surprisingly.
This week we completed a Christmas experiment. First we decorated balloons to look like Rudolph and then we blew them up. We attached them to a race track made from string and then let go! This was a demonstration of an action-reaction experiment. Blowing up the balloons fills them with air under pressure and releasing the air exerts a force on the balloon that propels it forward. The children loved testing if the size of the balloon would affect the speed and distance it travelled. It was a fantastic end to our Science club this half term.