It’s World Science Day on 10th November. Part of the purpose is to highlight the relevance and importance of science in our daily lives.
Here we’ve compiled six of our favourite experiments. They’re really easy to follow and you will find all of the ingredients in your kitchen cupboard or local supermarket.
Go ahead and stoke the fire of enthusiasm by amazing your child with the magic of science!
Animated Stickman
You will need:
Dry wipe marker pen
Glass bowl or plate
Water
Instructions:
- Draw a stickman on the plate or the bottom of the bowl with the dry wipe marker.
- Slowly pour water into the bowl or onto the plate and watch the stickman slowly rise.
- Gently swirl the water around to see the stickman move.
What happened?
Marker pen ink contains alcohol and different pigments. The alcohol dissolves leaving behind the pigments as a solid. The solid slides about when the glass gets wet because glass is so smooth.
Bag Explosion
You will need:
Bicarbonate of soda
Cellotape
Mixing bowl
Tablespoon
Toilet paper
Vinegar
Ziplock bag
Instructions:
- Make a bicarbonate of soda pouch by putting one tablespoon of bicarbonate of soda on a square of toilet paper. Fold the toilet paper and cellotape closed so that the bicarbonate of soda doesn’t leak out of the sides. Don’t overdo the cellotape though!
- Pour 75ml vinegar into the ziplock bag.
- Zip the bag so it is almost closed, but there is enough of a gap to fit the bicarbonate of soda pouch in.
- Insert the pouch into the bag but don’t let it touch the vinegar.
- Zip the bag tightly shut.
- Carefully place the bag in the mixing bowl.
- Swish the bowl about to mix the chemicals and watch what happens.
What happened?
When vinegar and bicarbonate of soda mix they react to produce carbon dioxide, water and sodium acetate. The carbon dioxide builds up and is trapped in the bag and so the bag explodes!
Fizzing Snowballs
You will need:
Bicarbonate of soda
Pipette
Tablespoon
Teacup
Vinegar
Water
Instructions:
- Fill the teacup 1/3 with bicarbonate of soda.
- Gradually add water to the teacup until the bicarbonate of soda forms a compact snowball.
- Place the snowball in the freezer overnight.
- Take the snowball out of the freezer.
- Pipette drops of vinegar onto the snowball to see it fizz.
What happened?
When vinegar (an acid) is added to bicarbonate of soda (a base) they react to produce carbon dioxide. Change the experiment by warming the vinegar before squirting it onto the snowball. You could also try freezing the vinegar instead of the bicarbonate of soda and sprinkling the bicarbonate of soda onto the vinegar.
Lava Lamp
You will need:
Alka Seltza tablet
Clean, empty lemonade bottle
Food colouring
Torch
Vegetable oil
Water
Instructions:
- A quarter fill the bottle with water.
- Fill the rest of the bottle up, almost to the top, with vegetable oil.
- Add a few drops of food colouring.
- Drop half of the Alka Seltza tablet into the bottle.
- Turn off the light and shine a torch at the bottle as you watch the lava fizz!
What happened?
You will notice that the oil floats on top of the water – that’s because oil is less dense than water. The food colouring sinks through the oil and mixes with the water because it is the same density as water. The Alka Seltza tablet dissolves producing carbon dioxide. Carbon dioxide is lighter than water and so it floats to the top bringing some of the coloured water with it. When the carbon dioxide is released from the coloured water the water becomes heavy again and sinks. This process repeats until the Alka Seltzer tablet has completely dissolved.
No-pop Balloon
You will need:
Balloon
2 pieces of cellotape about 6cm long
Sharp needle
Instructions:
- Blow up the balloon.
- Make a cross shape on the balloon by sticking the two pieces of cellotape.
- Stick the needle into the centre of the cross and leave it there.
What happened?
The cellotape stops the balloon from popping quickly. What causes a balloon to pop is not the sudden release of air but the widening of the hole. As the balloon’s hole gets bigger the balloon rips and pops. The cellotape slows down this process. You can try experimenting with different sized balloons and different sorts of tape to compare what happens.
Storm
You will need:
Food colouring
Dessert spoon
Pint glass
Teacup
Shaving foam
Water
Instructions:
- Half fill the pint glass with water.
- Spray shaving cream onto the water until the glass is 3/4 full.
- Spread the shaving cream evenly over the top of the water with your finger so that it’s flat.
- Half fill the teacup with water and add 10 drops of food colouring.
- Add the coloured water, spoonful by spoonful, to the shaving cream and watch a storm form under the foam!
What happened?
Like the shaving foam in the glass, clouds in the sky hold onto water. When the water gets too heavy for the clouds it falls out (precipitates) as rain, hail or snow.
Does your child need extra help with science?
TutorMyKids can put you in touch with an experienced science tutor who can help your child to understand tricky concepts and rekindle their enthusiasm. To talk about your child’s requirements, please call us for a chat.