To teach the children about science through simple experiments. Introduction: These short and simple experiments will help children to practise the process skills needed in science. This will increase the opportunity for children to develop and practise thinking. speaking and listening skills and give them the opportunity to experience a wider range of science topics, fostering their enthusiasm for science. Taken from the BB Junior Pro Pack M-2-11
• lp coin
• Jam jar
• Modelling Clay
• Baking soda
Activity 1 - Liquid Mix Up!
Have all your ingredients prepared and set up your table so that the children can see clearly what you are doing.
• Start by filling your jam jar just under a third with honey — the most dense of the three liquids.
• Then pour on the oil up to just under two thirds — this will float in top of the honey.
• Then pour the water on top leaving some space in the jar — this will sit on top of the oil and the three liquids will be clearly separated.
• The children will be quite impressed at this stage and you then ask them why this has happened.
• Let them give their explanations and make sure they understand that it is because of the density of the liquids.
• Next hold up the coin and ask them where they think that it will sit when you drop it into the jar.
• Ask the same question for both the cork and the grape.
• Then get a volunteer to drop in the coin, another to drop in the cork, and another to drop in the grape.
• Make sure they do it one after the other.
• The coin will sit in the honey, the grape will be in the oil and the cork will be in the water.
• Ask the children to discuss why this has happened and let them ask any questions at the end.
• Put the lid on the jar securely and then get one to the children to shake the jar thoroughly to mix all the liquids and then say at the end of the session we will check to see if it goes back to where it was.
• Before you come back together ask the group to decide if they think it will be separated again or all mixed up.
• Explain one more time about density/thickness.
Tips / Advice:
Hide the jar after the children have shaken it. You could let them all shake it so that the anticipation is greater.
Activity 2 - Heartbeats
Try this out to make sure that you know what you are doing.
Demonstrate this to the class using another adult leader:
• Put the group into palm before you start and get them to sit together for your demonstration.
• Take your partner by the wrist and using your first two fingers find their heartbeat on their wrist just below their thumb.
• Make a point of saying that it must be those two fingers as there is a pulse in your thumb.
• Hold your two fingers up to show them which ones.
• Once you have found the person’s heartbeat place the small piece of modelling clay over the pulse area.
• Make sure that it sticks to the hand and keep the hand flat so that it stays on.
• Then insert the end of the straw into the clay and watch as it moves with each heartbeat
• Get the children to watch closely so that they can see it.
• Then give each pair a piece of clay and a straw and tell them to find a space and find each other’s pulse.
• You will need to go around and help them as it can be hard to find the right place on the wrist.
• Once all the first children have found it and had a chance to watch the straw move tell them to change over and work the other way around.
• Once everyone has had a turn, bring the group back together to discuss.
Tips / Advice:
The children may need a lot of support on this so make sure all the leaders are available to help the pairs. Talk to the children about the heart pumping blood to carry oxygen around the body.
Activity 3 - Fizz It Up !
Have your ingredients measured out and prepared.
Children love fizzy drinks especially lemonade.
• Ask for some volunteers and get them to wear plastic aprons then give them some halved lemons and a juicer and get them to squeeze all the juice of five lemons into the jug. (you may need to make sure that they have all the juice.)
• Then get a child to pour in the same amount of water into the jug.
• Get another child to give it a stir.
• Stir in four teaspoons of sugar and mix again. (if this is not enough add more to sweeten.)
• Then have five teaspoons of baking soda measured out and get another helper to pour that in.
• That is when the mixture will fizz up as the lemon, an acid - and the baking soda cause a chemical reaction.
• The fizz that happens when you pour in the baking soda is carbon dioxide bubbles just like those in a bottle of fizzy drink bought from the supermarket.
Ensure the children understand what ingredients cause the reaction.
For full details see BB Junior Pro Pack M2-11