When I point up, it’s bright.
When I point down, it’s dark.

What am I?

I am a protector.
I sit on a bridge.
One person can see right through me.
Others wonder what I hide.

What am I?

I wave my hands at you,
But I never say goodbye.

You’re always cool with me,
Even cooler when I’m high.

What am I?

A necessity to some, a treasure to many,
I’m best enjoyed among pleasant company.
Some like me hot, some like me cold.
Some prefer mild, some like me bold.

What am I?

I come in the form of a question. If you don’t know the answers, you will think a lot, but when you know or you are being told the answer it sounds simple that you will think everybody can easily know.

I have been hot my entire life. Put me in water or in a freezer for days and I will still be hot. My red color should tell you but don’t be deceived, even when I’m green, I’m still hot. What am I?

I run fore to aft on one side of a ship and aft to fore on the other. What am I?