Simple DIY Science experiments for kids
“I hear and I forget. I see and I remember. I do and I understand. “– Confucius.
Knowledge is power and it has always been. There are so many things around us that we come across every day, but seldom we try to understand its functionality. Find out some of our smart science experiments and enjoy the simple pleasures of chemistry.
THE BOUNCY EGG
What you need – is an egg, a glass cup and a cup of white vinegar. Take a raw egg and put it in a glass cup, cover it with white vinegar, keep it as such for 4-6 days. Now, take out the egg from the cup and lo, you will see that the shell has vanished, and the egg has become soft and slightly squishy!
Would you like to know the magic behind? We all know that vinegar is acidic in nature and the egg-shell, basic in nature. When both acid and base gets mixed and dissolved in water, what happens? It reacts and forms a gas called carbon dioxide which softens the egg exterior thus making it squishy and this is the simple phenomenon behind the disappearing of eggshell.
Hope all of you have heard about hot volcanoes with steam and heat. Here’s a fun experiment for you.
All you need – is 2 tablespoons of baking soda, 1 tablespoon of water, 2 tablespoons of vinegar, few drops of food coloring, a small bowl, a ball that will sink within the bowl, plastic wrap and some space in the freezer. So, let’s do it – Take a small bowl and place a golf ball at the bottom of it. The only aspect to be taken care, is that the ball should fit into the bowl and doesn’t float.
Cover the sides of the ball in the bowl with plastic wrap in such a way that the wrap protrude out. Now pour the mixture of water, baking soda and food coloring into the bowl. Make sure to pour enough of the mixture in, so that it covers the ball. Keep the bowl in the freezer for 2 – 3 hours. Once it is frozen, let it melt a little, then slowly pull the plastic wrap off and place the ice invertedly on the table. Spray vinegar on the frozen mixture and watch them erupt. Keep adding the vinegar drop by drop to see the lava coming out of the volcano!
Where do you think the jinx lies? Simple, an acid-base reaction. Vinegar as said before is slightly acidic and baking soda, basic in nature. They react and emit the gas – carbon dioxide and it this gas that erupts as lava upon adding the vinegar.
FLOATING RICE BOTTLE
A very simple trick you can play with your friends.
What you need is – 2 plastic water bottles (empty and dry), 2 pencils or chopsticks, dry rice (enough to fill 2 bottles) and funnel (to fill the bottles with rice).
Fill bottle #1 with dry rice, loosely, leaving about 1″ from the top. Fill bottle #2 to the fullest and gently tap it on the counter. Keep filling the bottle #2 as much as possible so that no space is left out. To check for space, you can push the pencil into the bottle a few times, and pack it further. Make sure that, when you are done, both bottles appear to have the same quantum of rice in them. Now, set the 2 bottles on the table along with the pencils and call your friends in. Have your friend push a pencil into bottle #1 (loosely packed rice) while you push a pencil into bottle #2 (tightly packed rice). You will observe that your friend’s pencil will easily slide in and out of his bottle whereas, you will be able to pick up your bottle of rice with just the pencil. How’s that? Curious? Excited? You can offer to switch the pencils and try again but to find the same result.
Why so, what might have happened?
Yes, the reason is pure friction. You are able to lift bottle #2 with a pencil because of friction. It is the resistance of motion when one object rubs another, and its compactness. Now how do you verify its quantum? For that, you need to take 2 measuring bowls, dump each bottle of rice into their own measuring bowl and you will note how much extra rice was packed in Bottle #2 compared to Bottle No #1.
CLOUD IN A JAR
Rain has always been a wonder for kids. Have you ever tried to know how does this happen? Let’s do an experiment. What you need – is a glass jar, a glass of hot water, 4-5 ice cubes, a jar lid and few match sticks. Fill the glass jar partially with hot water. Cover the jar with a plate or a lid and top it with 3-4 ice cubes. Leave it for a few minutes – you will see the fumes taking the form of cloud inside the jar. Watch the hot fumes touching the cool ice lid. With the help of an adult person, show a lighted match near the covered lid for a few seconds. Blow out the match and place it between the jar mouth and plate. You can clearly view the cloud and the air currents. Now, lift off the plate and watch the cloud disperse.
Did you get any clue?
Here, when you pour hot water into a jar and trap it, a warm, moist air is created. But when you place a plate on top of the jar with ice cubes, the warm air inside, gets cooled. The moment the water touches the ice lid, the vapour condenses into tiny cloud droplets, thus constituting the so-called rain.
RAINBOW BUBBLE SNAKES
This is one of the fun activities kids love to do.
All you need – is an empty water bottle, a rubber band, a sock, dish soap and food coloring. Take the water bottle, cut off the bottom portion, slide the sock over to cover its bottom and tie around a rubber band to secure the sock. Now, pour some dish soap into a shallow container with a little bit of water and gently mix. Take the bottle, dip the sock end into the mixed solution and slowly blow from the bottle mouth, there you will see the lather bubbles coming out in the shape of a snake. Add drops of the food coloring onto the sock covered end. Please be careful when doing this with your kids. Remind your kids to blow the air out, and not in! If blowing in, they will be eating bubbles.