For this you will need a balloon, and a bucket of hot and cold water. Be careful with the hot water. Place the balloon in the cold water leave it for 15-20 minutes and see what happens. Then place the balloon in the hot water for 15-20 minutes. In the cold water the molecules are really crowded together in the balloon, so it shrinks. When you put the balloon in a warmer area, like this heated water, the balloon expanded because the molecules have spread out more in the warmer air.
Ingredients:Calcium lactate, Sodium alginate, Large bowl, Small bowl (for sodium alginate), Small bowl (rinsing water), Curved spoon, Slotted spoon. Method: 1. 1 cup water and 1 g sodium alginate – mix well. Can use a hand mixture. 2. Set mixture aside so that there are no air bubbles 3. 1 L water and 5g calcium lactate – mix well, making sure dissolves well. 4. using a dropper, drop small amounts of the of sodium alginate and place into calcium lactate bath. 5. Repeat as necessary, but do it slowly and don't crowd the bath. Stir solution gently. 6. With a slotted spoon remove each and rinse in a water bath to stop the reaction. Now both of the core ingredeients would usually dissolve by themselves when they touch water BUT when they are mixed together in water, they survive, grow stronger and form a gel.
I can guess your number
Pick a number between one and ten, make it a small number because we are going to do some maths in our heads. Multiply it by 2. Then multiply the new number. Now divide the new number by the original number. You then subtract 7 from whatever number you get. and the answer is 3, right. Let's go through the magic order. Start off by asking someone to pick a number. A number between one and ten is easiest but your subjects do like to challenge you so be prepared for anything. The number is 6. Once we've chosen our number, we multiply it by 2, so 6x2 = 12. Then multiply the new number (so in this case 12) by 5, which is 60. Now divide the new number (60) by the original number (which is 6). You then subtract 7 from whatever number you get. In this case 60 divided by 6 is 10, so we take 7 from 10. and the answer is 3. And it works with ANY number, big or small. The reason this works is because of the steps you take once you've chosen a number. If you multiply by 2, then multiply by 5 you will always have a multiple of 10. When you divide your original number by it will always equal 10. and when you subtract 7 from 10 you will end up with 3, every time! Pretty tricky, try it out on your friends!
Jacqui's slime recipe: 1/3 cup of pva glue 1 heaped cup of shaving cream 1 table spoon of contact fluid (must include boric acid) 1/8 teaspoon of baking soda Food colouring Iron filings Warning - iron filing are very small and can be very dangerous if they are inhaled, should not be handled by a child, get an adult to add them in. Keep the magnet away from the iron fillings. Mix all wet ingredients together before adding the baking soda. Kneed in hands to get slime consistency. When iron, the iron fillings in this case, gets close to the magnet the iron become magnetised itself and it causes this strong attraction. I'm going to put some iron filling in water to show you. The attraction is so strong that even through it fillings are weighted down by the slime, it still wants to be close to the magnet.