A magnetic field line:
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A magnetic field line or magnetic flux line shows the direction of a magnet's force and the strength of a magnet. The idea of lines of force was invented by Michael Faraday. ... For example, iron filings placed in a magnetic field line up to form lines that correspond to 'field lines'.

I took that at the beginning of the school year!!

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Explanation:

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2