In the past I was ten to the power of four, but now I can be less or I can be more. Some people would say that as a noun I'm improper, but noun before adjective, in that form I first prospered.

Turn me on my side and I am everything. Cut me in half and I am nothing.

I hold plates and start conversations. I list elements and order facts. I arrange rows for numbers and columns for decisions. Set me for dinner or set me aside in debate. What am I?

I vanish when you try to hold me, yet shape every life. I can be borrowed, but not owned. I can be measured, yet never seen. What am I?

You can buy me, or make me, but you can never get more of me; You can kill me, but you'll still die while I continue on; What am I?