[Daniel]

Let's start a quiz: One gives a question (all categories are allowed) and the one other answers, and is allowed to give a new question. If she/he doesn't know one, it will be up to the others to go on. The questions can be easy but also difficult .

I start an easy question: What is called "Olympiad" by the ancient Greeks?

 

[baroque flute]

The Olympiad was the four year interval between their games, and they later used the word as a measure of time--a four-year period. I like this idea.

 

[Daniel]

Exactly, baroque, now you it's your turn, or someone who wants.

 

[Harvey]

Good idea.

 

[baroque flute]

OK, here is my question. What do many cars use for fuel in Brazil? I don't know whether it is easy or hard to answer.

 

[max]

Would it be Hydrogen Gas???

Btw, Daniel, I love this idea, you mind if I use it on MH?

 

[Daniel]

Is it alcohol fuel?

@max: of course you can use it.

 

[baroque flute]

Right, Daniel! Your turn! It is legal there for YOUR CAR to drink and drive. But it has to be a particular kind of car of course or it's bad for its health. :lol:

 

[max]

Originally posted by baroque flute@Aug 8 2004, 02:15 PM
Right, Daniel! Your turn! It is legal there for YOUR CAR to drink and drive. But it has to be a particular kind of car of course or it's bad for its health. :lol:

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cool, I didn't know that...

 

[Daniel]

A drunken car :lol:. The next question: Why is the sky blue?

 

[Harvey]

That is the color most scattered by the atmosphere.
What is dark energy?

 

[ViolinFan]

Originally posted by Harvey@Aug 8 2004, 04:49 PM
What is dark energy?

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It's a theoretical type of energy that acts as a repulsive force, and is supposedly the cause of the universe's accelerating expansion. Scientists have not yet confirmed whether it actually exists.

What is a chachalaca, and where can it be found?

 

[Daniel]

It's a sort of bird and can be found from southern Texas in the Rio Grande Valley south to Nicaragua and Costa Rica.

Why is the sea salty?

 

[Harvey]

If memory serves, the inhabitants of the sea have no use for salt.

Why does the sunset appear red?

 

[max]

Originally posted by Harvey@Aug 9 2004, 03:10 PM
If memory serves, the inhabitants of the sea have no use for salt.

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I think that is wrong. Doesn't it have to do with the mid-rif region out in the middle of the ocean. Kinda like underwater volcanic motion..... Dangit, too complicated to explain without diagrams... I learned about this in 9th grade Earth Science, OMG, that was almost 8 years ago, feels like yesterday......

 

[Harvey]

Bah...I never bothered to take Earth Science...I start tenth year in a few weeks.

 

[Daniel]

At first to the salt question: One reason Max mentioned right: the submarine volcanos. Others are hydrothermal vents and wheathering of the continents.

To the sunset question: there is an effect called Rayleigh scattering, particles in the atmospheres, and more physics if i remember right...

 

[Daniel]

Is it true that, if a rainbow appears after a thunderstorm, you can see 2 rainbows?

 

[oistrach13]

I don't know

 

[Harvey]

Sometimes? If two reflections occur inside a raindrop, and you happened to be watching in the right spot.

Is the world round?