Different things

I am round like an apple
Flat as a chip
I have eyes
But I can’t see one bit
Answer

I am a short stick
I am soft
I can be white or coloured
You can write with me on the blackboard
Answer

Look at my face and you see somebody
Look at my back and you see nobody
Answer

What flares up quickly and does some good
But a moment later, it’s just a small piece of wood?
Answer