Sabtu, 22 Maret 2008

How Lead gets Inside Pencil?

The lead which is the part of the pencil that makes marks, is not really made of lead.
Pencil makers grind graphite and clay together into a mixture that looks like dough. They pour this mixture into a machine that has holes in it, the size of pencil leads. Another machine presses down on the mixture to push it out through the holes. It comes out inlong srings that are put into an oven to dry.
After the leads are dry, the pencil makers lay them inside grooves in a wooden block. Then they glue another wooden block over the leads.
Next, they send the blocks through a machine that cuts them into shiny, new pencils-just like the ones you use to make marks.

where does butter come from?


Butter doesn't come from butterflies or buttercups. Butter comes from milk. Milk is full of tiny, mind globules of fat and we use these fat globules to make butter.

In butter factories, the cream from milk is pured into tanks that look like great big drums. The drums turn and churn the cream. As the cream churns, the globules of
fat come together to make tiny cumps of butter. The rest of the cream, the part that doesn't clump and lump into butter, is drained from the drum. That's what we call buttermilk. All tha is left in the drum, then are lumps of butter. The lumps are washed in cold water. Some are salted. Then a machine cuts the butter into blocks, wraps it in paper and puts it into packages.
A dairy truck takes it to the store where your mother buys it. Now it's ready for ou to spread on your bread.

Kamis, 28 Februari 2008

Why The Sky Is Blue?

The sky usually looks blue not pink red yellow.
It gets its blue color from the sunlight thet shines through the air.
Sunlight contains all the colors of the rainbow, but these colors are scaterred as they pass through the air. Some colors are scaterred more than others, and the color you see-blue.

The sky usually looks light blue, but if you went to the top of the highest mountain, where there is less or between you and the sun to scatter the sunlight, the sky would be a deep, dark blue.

And if you rode in a rocket high above the earth, where there is no air at all to scatter the sunlight, the sky would be so dark that it would look black.
Sometimes the sky doesn't look blue. At sunrise and sunset, the light from the sun sometimes is scaterred in such away, that you see, orange, and other colors in the sky.

Minggu, 24 Februari 2008

Why a Rainbow is an Arc?



You can see a rainbow as an arc when the sun is behind you and the sky in front of you is filled with moisture. Each band of color occurs at a certain angle. The raindrops in each band lie in an arc. In the red band, for example, all the points of the arc measure about 42 degree from the line formed by the sun's rays. The other colored bends occur at angles less 42 degree from, the sun's rays.

Why Do Stars Twinkle?

Twinkle twinkle little star-why do stars twinkle?Air makes stars twinkle,
As the light from a star shines down on earth, it passes through the air around the earth. The air is always moving and changing. The changes are small, but they make the starlight bend and scatter. And thi is why a star twinkles.

The astronauts who have soared through where there is no air saw stars that didn't twinkle.

Kamis, 21 Februari 2008

why a doughnut has a hole?

The hole in doughnut can be something to eat around or stick finger in, or peek through. But you can't hold it. And once you eat the doughnut, the hole is gone.


A machine puts the hole in a doughnut. It punches the doughnut out of a flat piece of dough, the way you cut out cookies with a cooky cutter. The doughnut, hole and all, is put in boiling oil. The oil bubbles through the hole and around the doughnut until it is puffy and crisp. Without a hole, a doughnut just wouldn't be a doughnut. It would be a round, flat doughy cake with a soggy center.