Question

what are the features of earths crust, mantle, and core? identify supporting evidence how can iron filings provide evidence that the bar magnet has a magnetic field.

Explanation:

Step1: Recall magnetic - iron filing principle

Iron filings are ferromagnetic materials. When placed near a bar magnet, they align themselves along the magnetic field lines due to the force exerted by the magnet on them.

Step2: Observe the pattern

The iron filings form a pattern that shows the direction and shape of the magnetic field lines. The concentration of filings is higher near the poles of the bar magnet, indicating a stronger magnetic field there. The lines extend from the north - pole to the south - pole of the bar magnet, demonstrating the presence and orientation of the magnetic field.

Answer:

The iron filings align in a pattern that shows the shape and direction of the magnetic field lines of the bar magnet, with higher concentrations near the poles indicating stronger field regions.