Which of the following is true of compasses?
a. compass magnets can only be deflected by electromagnets such as earth''s magnetic field
b. compass magnets can be deflected by earth''s magnetic field or other permanent magnets
c. compasses always point toward geographic north
d. compasses detect fluctuations in convection in the matle

the true statement about compasses is: B. Compass magnets can be deflected by earths magnetic field or other permanent magnets. Im pretty sure thats something that happens to a magnet This very same characteristic make a compass unable to function if it got close to another source of magnetic force, in most case the compass' needle will spin uncontrollably

This is all you, but i can give you some topics that you could try. if it rained when you want to do something outdoors, it 'limits' that human activity. maybe you want to do an experiment that goes throughout the whole year and you have to have above freezing the entire year. this 'limits' your activity. i thought of those just off of the top of my head. something that gets to me that might be getting to you is you are thinking too hard about what to do. think simply, and if it is too simple, then bump it up just a little bit.