I’m sure, you must have submitted more than your share of science projects, thinking it will surely impress your science teacher. Unfortunately, there were few others who were always a step ahead in their project game. Though your school days have passed, you can make sure that this doesn’t happen to your child. How? Just have a look at these 5 easy science projects for school.
1. Liquids don’t mix (Density Experiment)
What it does: This experiment explains about the densities of different liquids by adding them up together. Instead of mixing, these liquids form layers due to the difference in their densities.
- A glass, a bowl and a spoon
- A turkey baster
- Rubbing alcohol
- Dish Soap
- Lamp oil and baby oil
- Food colour
- Extra Virgin olive oil and vegetable oil
- Corn syrup, chocolate syrup and Maple Syrup
How to make it:
• To do this experiment, take a glass and pour some honey into it. Next, add the corn syrup to the glass on top of the honey using the turkey baster.
• Similarly, add chocolate syrup on top of the corn syrup.
• Next, use the turkey baster to add maple syrup, milk, dish soap, water, vegetable oil, extra virgin olive oil, rubbing alcohol, and lastly the lamp oil into the glass.
• Now, you will notice that you have created a tower of different coloured liquids. This is because they have different density and as a result, don’t mix.
2. The Potato clean up act (Osmosis Experiment):
What it does: This experiment gives us a live demonstration of the process of osmosis using potatoes and salt. It shows how and why the raw potato cell absorbs the water, but the boiled potato does not.
- 3 potatoes (1 boiled and 2 raw)
- A tray of water
- A knife
How to do it:
• Start this experiment by peeling the 3 potatoes and make a cavity in each of them using a knife. Put salt in 1 raw potato and 1 boiled potato and keep the other raw potato empty.
• Next, put the 3 potatoes in a tray of water. After some time, you will notice that the salt in the boiled potato remains just the same while the salt in raw potato has dissolved. Want to know why?
• The raw potato with the salt has drained out the water from the cells lining the cavity due to the process of osmosis. This process continues as the cells keep absorbing water from each other until the outermost layer of cells which in turn absorb water from the tray itself.
• On the other hand, all the cells in the boiled potato are already dead due to which the salt hasn’t dissolved in it.
3. The Life Experiment (Bacteria in Petri Dishes):
What it does: This experiment proves that bacteria are present everywhere, and anywhere — all they need is a dark place and suitable conditions to grow.
- Items needed:
- A microwave
- Petri Dishes
- Nutrient Agar
- Cotton swabs
- Clorox wipes
- Zipper lock bag
How to make it:
• In order to do this experiment, start by putting the agar into the beaker and pour some hot water into it. Stir the mix and let it boil for 3 minutes in the microwave.
• After that, take the beaker out and let it cool for a few minutes. Next, fill the petri dishes halfway with the agar solution and cover them up and leave them for 1 hour.
• Now, take a cotton swab, dip it into some water and wipe it on a phone. Then take it and draw a line with it on one the agar inside the petri dish and close the lid. Similarly, repeat the process with other surfaces like a TV remote or a soap dispenser and place their samples on the agar inside the petri dish.
• Next, place all the petri dishes in a safe and dark place for the bacteria to grow. Check these petri dishes after a week. You will see bacterial growth inside the dishes, proving that these bacteria’s are everywhere.
4. Can’t sink this spirit (The Floating Egg experiment):
What it does: This experiment shows you how and why an egg sinks in clear water but floats in salty water. As the density of salt water is more than the egg, it can hold the egg and allow it float. However, the density of clear water is less, so it’s unable to hold the egg.
- 3 eggs
- A cup of salt
- 3 glasses
- A jug of water
How to do it:
• You can start this experiment by taking the 3 glasses and filling them with the same amount of water. Next, add 4 teaspoons of salt to 2 of the glasses and continue stirring till it has completely dissolved.
• Put one egg in each glass. You will notice that the egg in the clear water has sunk while the eggs in the salt water are floating. This is because the density of the salt water is more which makes the eggs float.
• Now, pour some clear water into one of the saltwater glasses and you will notice that the egg has gone lower. This is because the clear water has diluted the salt water and, as a result, the density has decreased.
5. Modelling art (Convert Milk into Plastic):
What it does:
When milk and vinegar are mixed, the proteins of the milk do not accept the hydrogen ions. Therefore, the mixture forms white lumps. These lumps known as casein are then used to make plastic after its liquid is drained.
- Paper towels
- Cookie Cutter
- 1 cup of milk
- White vinegar
How to do it:
• The first step in this experiment is to pour 4 teaspoons of vinegar and adding them to the milk. Now, mix them using a spoon and you will see lumps forming in the solution which later on become blobs.
• Next, pour the mixture through a strainer and you will notice that the blobs are left behind while the rest of the solution is in the cup. Take whatever is left in the strainer and drain all its liquid using the paper towels.
• After you have drained all the liquid, start squeezing it into a ball. Keep it on a table and gently press it to make it thin and make different shapes out of it.
• Now, press the cookie cutter on the thin mixture to start making the shape. Once you’re done, let it dry for at least 2 days and voila! You have made your own plastic from milk.
I’m sure looking at these experiments now; you are undoubtedly regretting not trying them in your school days. Well, we can’t do anything about that, but you certainly can help out your child get that A+ in his school science fair.