Cool Science Experiments For Kids This site contains some science experiments for kids to do @home or school
  • scissors
    March 23rd, 2009CTRecycle

    Hey kids, you like reading newspaper? After reading it what do you do with it?

    Well this time, I have a cool experiment to turn old newspaper into recycle paper.

    We can use the recycle paper for scrap book, greeting cards, drawing book…etc…

    So let get starting with the material.

    Material Require:

    1.Get your yourself a eletrcic egg beater



    2.A big pail
    3.One/ A few mosquito net or a mosquito screen, you just need to a small piece (Roughly an A4 size paper). Better still if  someone can give it to you 😉
    4.Some water (Hot water will be nice but becareful with it, ask adults to help out)
    5.Scissors
    6.A hot day
    7.You
    8. Well off course, old newspaper…!!!

    Instructions:-

    1.Tear the old newspaper into small pieces. After you tear the small pieces, you still can use scissors to reduce the size of the teared pieces. Please make sure all the pieces are collected in the pail else it will be very messy. Depending on how many recycle papers you want, my experience is that 3 to 4 pages of newspaper is enough to produce 5 to 6 recycle paper. So, if you wanna make a book keep tearing…!!!
    Collect The Pieces of Paper in a Pail

    Collect pieces of paper into a pail

    You can use scissors to cut the paper into smaller pieces

    Use scissors to cut the paper into smaller pieces

    2.Pour water into the small piece that you have just teared. Just pour enough water to cover all the small pieces. Make sure all the small piece are soak in the water. The process is to soften the newspapers. and remove colors, inks from the paper. Soak the papers for 30 minutes.At this point, can add some food colouring to make it colourful.

    Pour water into the pail

    Pour water into the pail

    3.If you have time you can experiment this. Instead of soaking the papers for 30 minutes, you can soak the papers for a week. But, be warn! It can be very stinky!!! By the time, the paper will look mushy. So, we will use a electric egg beater to turn our soaked papers into mushy papers.

    Beat the papers until mushy, yeah beat them up!!!

    Beat the papers until mushy, yeah beat them up!!!

    4.Once your papers look mushy. Go grab you screen.
    Grab your screen

    Grab your screen

    5.Put the screen into the mushy papers. Time to get dirty!!!
    6.Pull the screen out of the mushy paper. Make sure the whole screen is covered with mushy papers. Once you take your screen out of the mushy paper. Do not touch the mushy paper on the screen. I repeat DO NOT TOUCH YOU MUSHY PAPER!!! Cause if you touch it, there will be a hole on your recycle paper.
    Make sure the whole screen is covered up

    Make sure the whole screen is covered up

    7.Now, let the screen with mushy paper dry under the hot sun. It should just take a while. Have some cookies or watch some cartoons.
    Let it dry under the hot sun

    Let it dry under the hot sun

    8. Go collect your recycle paper.
    9. Slowly peal of your recycle paper.
    Slowly peal off the recycle paper from the screen

    Slowly peal off the recycle paper from the screen

    10. Do what ever you like with your ‘reward’. Be cool…!!! 😉
    Hmm...what should I do?

    Hmm...what should I do?

  • scissors
    March 14th, 2009CTChemistry

    What,…!!! How can raisin float?

    No worries,  in this next cool science experiments we gonna make the raisins float.

    Hmm…lets prepare all the materials listed below:-

    1. A pack of Raisin off course.

    2. A glass

    3. A bottle of soda water, best if you can get those without colour. A Sprite maybe ;P

    Instructions:-

    1. Fill your glass up with soda water.

    Fill the glass up with soda

    Fill the glass up with soda

    2. Put some raisin into the glass. What happen to the rasin?

    Put your raisins into the soda

    Put your raisins into the soda

    3. Wait for a while…

    Gas Power!!!

    Gas Power!!!

    4. Magic…!!!

    Look! Rasins are floating!

    Look! Raisins are floating!

    Exlanations:-

    Well, as you know kids. Soda water is make up of water and gas (carbon dioxide). So, when the raisins are in the bottom of the glass, gas bubbles started to attach on the surface of the rasins. Once enough gas bubbles are attached on them, the raisins will be floated by the gas bubble. But, once raisins floated on the surface of soda water, the gases are release into the air, thus making the raisins sink again.

  • scissors
    March 14th, 2009CTBiology

    Children come from fusion of (or make simple meet up with) mama’s ovum and dad’s sperm known as zygote. So, how does ovum and sperm meet in the first place?

    Race of the Sperms

    Through sexual intercourse, sperms in dad’s reprodcutive organ will flow into mama’s reproductive organ (into the Ovari, which release a ovum). There will 200 – 300 million sperms rushing to the ovum, only one race winner will meet up with ovum to form zygote.

    Sperms Rushing Towards Ovum

    Sperms Rushing Towards Ovum

    Only one sperm can go into ovum to complete the fusion.
    There is only one winner

    There can only one winner

    To become a embryo, zygote divide into two, then two become four,and it keeps repeatedly divide, and being push to the uterus at the same time.
    Zygote Starts To Dividing

    Zygote Starts To Dividing

    Until the eighth day, the dividing zygote implants itself on the wall of the uterus and make a home there.
    Zygote sticks itself onto uterus wall

    Zygote sticks itself onto uterus wall

    Next, zygote become an embryo. Withins 3 weeks, embryo can grow up to 2mm long
    Zygote Turns Into Embryo

    Zygote Turns Into Embryo

    Four weeks later, embryo becomes 1 cm long, and bones and brain is developed.
    Next, embryo starts to grow bones and brain

    Next, embryo starts to grow bones and brain

    Eight weeks later, embryo grows up to 4cm long, it starts to grow limbs and organs….becoming a feotus.
    Embryo grows limbs and organs

    Embryo grows limbs and organs

    3 months later, feotus starts to grow hair.
    Hair starts to grow on foetus

    Hair starts to grow on foetus

    Come the fourth month, we will know is it a boy or a girl?
    Time to know...Boy or Girl?

    Time to know...Boy or Girl?

    Starting from the fourth month, mama will feel the moving feotus in her stomach
    Mama can feel her baby moving

    Mama can feel her baby moving

    Seventh month, feotus will turn in the uterus and it will keep the up side down position until it is borned… the feotus’s body is filling up the whole uterus.
    Almost time to come out!

    Almost time to come out!

    By the tenth month, mama will giving birth to a new born baby!
    A baby is born!

    A baby is born!

  • scissors
    March 8th, 2009CTPressure

    Well, we are not actually gonna do this experiment with any soccer ball. Instead, we are using materials listed below:

    1. A hair dryer

    2. An empty soda bottle

    3. A small pieces of paper (our ball)

    Steps:

    1. Let your empty bottle lies on the table with the month facing the hair dryer.

    2. Use the small pieces of paper to make a ball, but make sure it can go through the bottle mouth.

    3. Turn on the hair dryer.

    4. See you can score the ball in the empty bottle mouth using the hair dyer.

    Explanations:-

    While trying to push the ball into the empty bottle, you are actually blowing streams of hot air into the empty bottle. This makes the empty bottle so full of air and no other object can enter it. Now, if you turn off your hair dryer and let the air in the empty bottle escapes. You can easily ‘kick’ the ball into the empty bottle.

  • scissors
    March 7th, 2009CTForce

    Kids, try recall this… You wake up in the morning and go to kitchen for breakfast. Eggs are on the table and you always yell to your mum asking which is cooked ? Sounds familiar…?

    Now, I gonna tell your a trick to differentiate the cooked (hard boiled) and the raw egg.

    Well, the answer is fairly simple : SPIN IT!!!

    The hard boiled egg is easy to spin and can be stoped instantly (with your fingers off course). The raw will be shaking around and can’t be spin at all but after you get it to spin, it will spin again after you have stopped it.

    Explanations:-

    A hard boiled eggs is cooked and it is solid inside which means the egg white and egg yolk is in solid form. While, the raw egg is uncooked and there is liquid floating around in the egg.

    Kids, concept here is Inertia!!! (will discuss more in later post)

    Inertia cause the yolk in the uncooked egg to spin slowly or can’t start spinning when we try spin it. Later when we want to stop it from spinning,  the moving liquid in the egg keep on spinning making it spinning again if we move our fingers away.

    As for the cooked egg, the solid inside the egg spins together with the shell. Thus, we have little problem in spinning it.

    So, no more Hard Boiled Egg vs Raw Egg every morning!

    Tags: ,
  • « Older Entries