Misconceptions within Science
Posted: Fri Jun 06, 2008 4:36 am
SCIENCE MISCONCEPTIONS
William J. Beaty is part of the UW staff in WA state.
He calls himself "The Science Hobbyist"
One of his sites can be found here: Science Misconceptions
Another of my favorites is "The Bad Astronomer". He doesn't stick to astronomy only o.O

Below I'll quote the Science Hobbyists attempt to debunk a common (K-6) misconceptions about gravity as as example.
First though, if you like these types of websites, please allow me to ask you to link / quote and share some of yours in reply.
The Science Hobbyist said:
Please reply quoting your favorites from my links above, or better yet, others of your own.
~Granps

William J. Beaty is part of the UW staff in WA state.
He calls himself "The Science Hobbyist"
One of his sites can be found here: Science Misconceptions
Another of my favorites is "The Bad Astronomer". He doesn't stick to astronomy only o.O
Phil Plait wrote:"For some reason, no one has claimed that it’s Jesus smiling.
Maybe Jesus hated grapes.
That would explain why he didn’t turn water into Welch’s."

Below I'll quote the Science Hobbyists attempt to debunk a common (K-6) misconceptions about gravity as as example.
First though, if you like these types of websites, please allow me to ask you to link / quote and share some of yours in reply.
The Science Hobbyist said:
I like "Science Hobbyist" and others because they explain in a manner that is easy enough to understand.Bill Beaty wrote:GRAVITY IN SPACE IS ZERO? WRONG.
Everyone knows that the gravity in outer space is zero.
Everyone is wrong.
Gravity in space is not zero, it can actually be fairly strong. Suppose you climbed to the top of a ladder that was 300 miles tall. You would be up in the vacuum of space, but you would not be weightless at all. You'd only weigh fifteen percent less than you do on the ground. When 300 miles out in space, a 200lb person would weigh 170lb. Yet a spacecraft can orbit 'weightlessly' at the height of your ladder! While you're up there, you might see the Space Shuttle zip right by you. The people inside it would seem as weightless as always. Yet on your tall ladder, you'd feel nearly normal weight. What's going on?
The reason that the shuttle astronauts act weightless is that they're inside a container which is FALLING! If the shuttle were to sit unmoving on top of your ladder (it's a strong ladder,) the shuttle would no longer be falling, and its occupants would feel nearly normal weight. And if you were to leap from your ladder, you would feel just as weightless as an astronaut (at least you would until you hit the ground!)
So, if the orbiting shuttle is really falling, why doesn't it hit the earth? It's because the shuttle is not falling down, it is moving very fast sideways as it falls, so it falls in a curve. It moves so fast that the curved path of its fall is the same as the curve of the earth, so the Shuttle falls and falls and never comes down. Gravity strongly affects the astronauts in a spacecraft: the Earth is strongly pulling on them so they fall towards it. But they are moving sideways so fast that they continually miss the Earth. This process is called "orbiting," and the proper word for the seeming lack of gravity is called "Free Fall." You shouldn't say that astronauts are "weightless," because if you do, then anyone and anything that is falling would also be "weightless." If we drop a book, does gravity stop affecting it, should we say it becomes weightless? If so, then why does it fall? "Weight" is the force which pulls objects towards the Earth, and this force is still there when objects fall.
So to experience GENUINE free fall just like the astronauts, simply jump into the air! Better yet, jump off a diving board at the pool, or bounce on a trampoline, or go skydiving. Bungee-jumpers know what the astronauts experience.
Unknown Source wrote:Wisdom does not consist in knowing more that is new, but in knowing less that is false.
Please reply quoting your favorites from my links above, or better yet, others of your own.
~Granps









