Test yourself with some 8th grade science (are you as smart as a 13 year old?).
#1: What are animals without backbones called?
#2: True or False? About one-third of the food that humans take in is used to keep us warm.
#6: You are looking through a microscope with an overall magnification of 600x. The eyepiece lens is 20x. What is the magnification of the objective lens?
If you are struggling - just cheat.
Answers posted in the next few days.