Here are the answers to your questions:
Question 1:
The magnetic north pole is located
Answer: in northern Canada
Question 2:
The Earth has a magnetic field that protects it from asteroids.
Answer: false (The magnetic field protects against solar wind and cosmic radiation, not directly from asteroids.)
Question 3:
The strongest part of a magnet is in the middle of the pole.
Answer: false (The strongest part of a magnet is at the poles, not in the middle.)
Question 4:
The evidence that helped scientists determine the magnetic poles of Earth flip periodically was found around the mid-Atlantic ridge.
Answer: true
Question 5:
When the magnetic field lines are the closest is when the magnet is the strongest.
Answer: true
Let me know if you need further assistance!