Here are some funny response to questions on school science
tests:

There are 26 vitamins in all, but some of the letters are
yet to be discovered.

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.

Water vapor gets together in a cloud. When it is big enough
to be called a drop, it does.

Mushrooms always grow in damp places, which is why they
look like umbrellas.

Momentum is something you give a person when they go away.

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.

When planets run around and around in circles, we say they
are orbiting. When people do it, we say they are crazy.

One of the main causes of dust is janitors.

Thunder is a rich source of loudness.