Answer:
I hide but my head is outside. What am I?
What loses its head in the morning but gets it back at night?
The last woman on Earth received a phone call. Who was the caller?
I have all the knowledge you have. But I am so small that I can fit into your hands. What am I?
What is always in front of you but can't be seen?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?