I Can Always Go Up, Never Down
I can always go up, never down,
I can always turn left, never right,
I am always hot when I’m cold
A ski lift.
I Am Worthless
I am worthless, yet when added to others I add worth.
I confounded the ancient Greeks, yet I changed men’s understanding.
What am I?
0 (Zero).
Zero is nothing, yet when you add zeroes to a number like 1, it becomes 10, 100 or 1,000.
The ancient Greeks did not have a name for zero and did not use a placeholder. They seemed unsure about the status of zero as a number, philosophizing about how nothing could be something. Once zero was added, it allowed for more mathematical understanding.
A Home But No Family
I have an end but no beginning, a home but no family, a space without room. I never speak but there is no word I cannot make. What am I?
A keyboard.
I Generate Fear But Am Quiet As A Mouse
I can generate fear and some say I come out of your ears. I’m quiet as a mouse but not welcomed in the house.
Smoke.
Exist Between Two Things
It can only exist between any two things
and men know it well for the hardships it brings.
Distance.
By Sef Daystrom
Soft and Transparent
I am soft and transparent.
I am so small that I can sit on your finger.
I have no light but I help you to see the beautiful world.
What am I?
A contact lens.
I Never Even Touch the Ground
For some, I am used to get around.
I never even touch the ground.
Sometimes I fall and sometimes I float,
If I’m in the air, then take note.
What am I?
A boat. Boats are used to get around, they aren’t on the ground, but in the water. They rise and fall with the waves, and if they’re in the air, it may be due to rough seas and you should be careful.
Another possible answer is a blimp.