Question

which statements accurately describe earths magnetic field? check all that apply.
the magnetic field lines flow from antarctica to northern canada.
the magnetic field is created by magnetic rocks on the surface.
the magnetic poles line up exactly with earths geographic poles.
the magnetic field is generated in earths core.
the magnetic field is similar to the magnetic field of a bar magnet.

Explanation:

1. For "The magnetic field lines flow from Antarctica to northern Canada": Earth's magnetic south pole is near Antarctica and magnetic north pole is near northern Canada, so field lines flow from magnetic south (Antarctica region) to magnetic north (northern Canada region) – this is correct.
2. For "The magnetic field is created by magnetic rocks on the surface": Earth's magnetic field is generated by the dynamo effect in the core, not surface rocks – this is incorrect.
3. For "The magnetic poles line up exactly with Earth’s geographic poles": Magnetic poles and geographic poles are not aligned exactly (there's a magnetic declination) – this is incorrect.
4. For "The magnetic field is generated in Earth’s core": The geodynamo in the outer core (liquid iron - nickel) generates the magnetic field – this is correct.
5. For "The magnetic field is similar to the magnetic field of a bar magnet": Earth's magnetic field has a dipole - like structure, similar to a bar magnet with a north and south pole – this is correct.

Answer:

• The magnetic field lines flow from Antarctica to northern Canada.
• The magnetic field is generated in Earth’s core.
• The magnetic field is similar to the magnetic field of a bar magnet.