THE FOLLOWING ARE ACTUAL ANSWERS GIVEN BY 5TH AND 6TH GRADERS:

The law of gravity says no fair jumping up without coming back down.
You can listen to thunder and tell how close you came to getting hit. If
you don't hear it, you got hit, so never mind.
Someday, we may discover how to make magnets that can point in any
direction.
A vibration is a motion that cannot make up its mind which way it wants
to go.
There are 26 vitamins in all, but some of the letters are yet to be
discovered.
There is a tremendous weight pushing down on the center of the Earth
because so many people are stomping around up there these days.
Genetics explains why you look like your father, and if you don't, why
you should.
Vacuums are nothings. We only mention them to let them know we know
they're there.
The cause of perfume disappearing is evaporation. Evaporation gets
blamed for a lot of things people forget to put the top on.
I'm not sure how clouds are formed, but clouds know how to do it, and
that's the important thing.
Water vapor gets together in a cloud. When it is big enough to be
called a drop, it does.
Rain is saved up in cloud banks.
It is so hot in some places that people there have to live in other
places.
Mushrooms always grow in damp places, which is why they look like
umbrellas.
Momentum is something you give a person when they go away.
A monsoon is a French gentlemen.
The word "trousers" is an uncommon noun because it is singular at the top
and plural at the bottom.
To keep milk from turning sour, keep it in the cow.
Some people can tell what time it is by looking at the sun, but I have
never been able to make out the numbers.
When planets run around and around in circles, we say they are orbiting.
When people do it, we say they are crazy.
In some rocks, you can find fossil footprints of fishes.
For asphyxiation, apply artificial respiration until the patient is
dead.
Blood circulates through the body by flowing down one leg and up the
other.
Thunder is a rich source of loudness.
The four seasons are salt, pepper, mustard and vinegar.
The alimentary canal is located in the northern part of Indiana.
One of the main causes of dust is janitors.
The inhabitants of Moscow are called Mosquitoes.
A census taker is a man who goes from house to house increasing the
population.
A city purifies its water supply by filtering the water and then forcing
it through an aviator.
The spinal column is a long bunch of bones. The head sits on the top, and
you sit on the bottom.