What am I riddles for teens

You bury me when I am alive, and dig me up when I die. What am I?

When it comes to me, you go on red and stops on green. What am I?

I live in the ocean. I like to eat crabs. I can change colors. My eight legs are called tentacles. I am an...

Take off my skin - I won't cry, but you will! What am I?

With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?

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

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

I am something to make you think, I am something to make you know. I am something to which the answer you might never know. What am I?

What word in the English language does the following: the first two letters signify a male, the first three letters signify a female, the first four letters signify a great man, the first six letters signify a drug, while the entire world signifies a great woman. What is the word?

My best buddy always makes mistakes. But I would easily get rid of the mistakes. What Am I?