What am I riddles

I am pronounced as a one letter alphabet. I am written with three letters. I am complete with just two letters. I am double. I am blue I am black I am brown I am gray I am yellow and I am green. I can read from both ends. I appear the same every way! What am I?

I have a little house in which I live all alone. It has no doors or windows, and if I want to go out I must break through the wall. What am I?

I can sizzle like bacon, I am made with an egg, I have plenty of backbone, but lack a good leg, I peel layers like onions, but still remain whole, I can be long, like a flagpole, yet fit in a hole. What am I?

As small as your thumb, I am light in the air. You may hear me before you see me, but trust that I'm there. What am I?

I live in the ocean. I move slowly. I eat clams. I have five arms. I am a...

I look taller when I am young. But as I get old, I become shorter and shorter. What Am I?

What do you throw out when you want to use it, but take in when you don't want to use it?

Physicists have built devices to move me very fast. My last seven letters can be commonly found in newspapers, magazines and journals. What am I?

For thousands of years, Seen only in tale. The wind as a sail, For one thunderous gale. Shiny stores rich in lore, The burning temper, like Earth's core. What am I?

I am a vehicle. I spell the same when you read me forwards as well as backwards. What Am I?