2 Simple DIY Science Experiments for Home

Science is everywhere around us. It is in the airplanes that fly, in the colors we see around us, in the storms that occur every now and then, in the music we enjoy and in the trees whistling through the winds. Explaining certain fundamental aspects of science to children becomes simpler in the form of simple science experiments for kids which can be carried out with everyday objects around us.

Here are two such examples of easy DIY science activities that talk about the concepts of bubbles in water and eggs, raw versus hardboiled.

The Bubbly Experiment
Why does water splash and form bubbles in a tub or bucket when it flows into it from a height in the form of a stream?

qwe.jpg
Water” by brainralien is licensed under CC by 2.0

Requirements:
A wide-mouthed bowl, a glass tumbler, some water.

Procedure & Observations:
• Pour water both into the wide-mouthed bowl and the glass tumbler upto the halfway mark in each.
• Holding the tumbler at a slightly higher level above the bowl, start pouring water from the tumbler into the bowl.
• You will see bubbles forming on the surface on the water.
• Now hold the tumbler lower (nearer to the bowl) and start pouring water again from the tumbler into the bowl from a lesser height than in the previous step.
• This time around, you will not see any bubbles forming on the surface of the water.

Explanation:
The answer lies in the formation of air pockets which cause bubbles to form when the water is poured into the bowl from a considerable height. While falling, air gets trapped in the stream of water and forms a number of pockets of air. When the stream of water strikes the surface of water with force (since it is from a height), it breaks through the upper surface or skin of water, forcing the pockets of air to come out as bubbles back on to the surface. On the other hand, when water falls into the bowl from a considerably lesser height (close to the surface of water), no air pockets are formed, it does not break through the upper surface of water and hence no bubble formation occurs.

The Eggy Experiment
You have two eggs. One is raw and the other is boiled. How would you find out which one is which, since both appear the same from the outside?

rty.jpg
Egg” by WerbeFabrik is licensed under CC by 2.0

Requirements:
A raw (unboiled) egg, a boiled egg, a flat table top.

Procedure & Observations:
• On a flat table top, place the first egg. Spin it like a top gently.
• Do the same with the second egg and allow it to spin too.
• Next, gently stop each egg from spinning.
• One egg will stop spinning as soon as you apply force with your fingers.
• The other egg will also eventually stop, but will roll around a bit unsteadily even after you’ve applied gentle force with your fingers to stop its motion.

Explanation:
The egg which stops spinning altogether as soon as force is applied to it is the hard-boiled egg. This particular egg will also start spinning the instant you apply force to it in the right direction. This is because it has solidified from within and behaves like a single solid body. On the other hand, the raw egg wobbles a bit unsteadily when you try to stop it from spinning and does not come to rest immediately. This is because inside it there is liquid yolk and egg white which resist the force of motion. As a result of inertia, the shell outside is spun but the liquid part inside is still at rest and does not start moving instantaneously. It is the same inertia which prevents it from stopping altogether once force is applied against it. Inertia can be defined as ‘the property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.

Have you carried out any interesting science experiments with your kids at home? Feel free to add to this list.
Profile

brionnasimpson

Author:brionnasimpson
I am an assistant teacher and my aim is to curate unique learning tips and techniques customized towards kids.

Search
Latest journals
Category
Monthly archive
Display RSS link.
QR code
QR