Answer:
What can you add to a bucket full of water to make it lighter?
What do you get when you mix lemons with gunpowder?
What do you call a greedy grumpy holiday hater?
What's large on Saturday and Sunday. Small on Tuesday, Wednesday, and Thursday, and disappears on Monday and Friday?
It describes an era in history during which lights was hard to come by.
You throw me out when you use me and take me in when you are done.