adopted from
Science Bob.
Karena situsnya berbahasa Inggris, jadi agak males translate-innya, tapi intinya ini bikin lampu lava sederhana gitu deh. Kayak gini ni...
Lucu ya? Eh, nggak lucu sih (gak pada ketawa kan?). Hemm menarik! Berikut bahan-bahannya. Bisa translate sendiri kan? Kalo gak bisa minta tolong Om Gugel aja ya. Lets cek it aut!
You will need:
- A clean 1 liter clear soda bottle
- 3/4 cup of water
- Vegetable Oil
- Fizzing tablets (such as Alka Seltzer; CDR, etc.)
- Food coloring
What to do:
1. Pour the water into the bottle.
2. Use a measuring cup or funnel to slowly pour the
vegetable oil into the bottle until it's almost full. You may have to
wait a few minutes for the oil and water separate.
3. Add 10 drops of food coloring to the
bottle (we like red, but any color will look great.) The drops will
pass through the oil and then mix with the water below.
4. Break a seltzer tablet in half and drop the
half tablet into the bottle. Watch it sink to the bottom and let the
blobby greatness begin!
5. To keep the effect going, just
add another tablet piece. For a true lava lamp effect, shine a
flashlight through the bottom of the bottle.
HOW DOES IT WORK??
To begin, the oil stays above the water because the oil is lighter
than the water or, more specifically, less dense than water. The oil and
water do not mix because of something called "intermolecular
polarity." That term is fun to bring up in dinner conversation.
Molecular polarity basically means that water molecules are attracted to
other water molecules. They get along fine, and can loosely bond
together (drops.) This is similar to magnets that are attracted to each
other. Oil molecules are attracted to other oil molecules, they get
along fine as well. But the structures of the two molecules do not allow
them to bond together. Of course, there’s a lot more fancy scientific
language to describe density and molecular polarity, but maybe now
you’ll at least look at that vinegrette salad dessing in a whole new
way.
When you added the tablet piece, it sank to the bottom
and started dissolving and creating a gas. As the gas bubbles rose, they
took some of the colored water with them. When the blob of water
reached the top, the gas escaped and down went the water. Cool, huh? By
the way, you can store your "Blobs In A Bottle" with the cap on, and
then anytime you want to bring it back to life, just add another tablet
piece.
Nah, khususnya buat PROTONSEGA (KIR SMAN 103 Jakarta), kayaknya keren buat dicoba ya? Sebenernya sih pas waktu angkatanku kelas 10 pernah dicoba, tapi dulu bukan pake fizzing tablet, tapi garam -_- yah yaudahlah, tapi waktu itu lumayan berhasil, tapi cuma bentar hehe. Yah mungkin dengan memakai fizzing tablet jadi lebih efektif :D