Answer 1:
I have heard that many animals can detect the
magnetic field of the earth and use this to find
their way when they are migrating. The zoologist
Wolfgang Wiltschko has done a lot of work learning
about this. You've probably learned about
the senses in school: vision, sense of hearing,
sense of touch, sense of smell, sense of taste.
But if animals can detect the magnetic field of
the Earth that means that they have another sense:
a sense of magnetic fields! Maybe the
animals only use this when they are traveling long
distances, so it might be difficult to watch this
happening. But maybe they would react to a small
nearby magnet. I don't know, and it's an
experiment you could do. You could set up
bird feeders, some with magnets and some
without.Then you would count how many birds come
to eat at that bird feeder.Do they prefer feeders
with magnets? Do they prefer feeders without
magnets? Maybe they don't care about magnets, and
the kind of food matters more, or the amount of
sun or shade matters more. You can investigate
this.You will need to figure out how to run
this experiment. Do you want to watch the feeders
for a certain time period each day? Would it be
easy to videotape the feeders? Remember to use
a control in your experiment!
Good luck! | 
