Answer:
Angels and pilots work with me.
Railroad Crossing, look out for the cars. Can you spell that, without any R's?
You have to travel far before you turn it over. What is it?
I am all around yet to me you are half blind. Sunlight makes me invisible and difficult to find.
I am an object which is used in baseball during the day I can't be seen at all
Give it food and it will live, give it water and it will die.