Question

guiding question
what makes a magnet stick to your refrigerator?
related reading
read about magnetism in nature. if anything you read helps you answer the guiding question, record it as an observation.
1 according to the text, what makes lodestone a permanent magnet?
lodestone is formed during volcanic eruptions
lodestone is long - lasting and difficult to remove
lodestone continuously produces it own magnetic field
lodestone only produces a magnetic field when it is near steel
about 2,600 years ago, farmers in the greek city of magnesia noticed strange stones in gray and dull, these stones did something incredible: they moved! the rocks were pulled iron tools by an invisible force. to some, this was evidence of the stones soul. to others, mystery.
centuries later, similar stones were discovered in china. scholars named them tzuh - shih, because of the way they “hugged” iron. in english, these remarkable rocks are called lode
lodestones, like the one pictured here, are permanent magnets. this means that they co their own magnetic fields. other permanent magnets include compass needles and refrig although these are not found in nature.
permanent magnets can temporarily magnetize other materials. consider steel, a metal machines. steel is not a permanent magnet. one steel washing machine will not be pulle magnetic field on its own.
however, a steel washing machine can become magnetic when its exposed to a permane magnetism when the field is removed.
for example, a lodestones magnetic field will temporarily magnetize the steel washing m machine produces a magnetic field, too. when the two fields interact, bam! youve got a stuck to your washing machine.
while pulling a lodestone off a washing machine might be a bit challenging, it certainly do millennia.

Explanation:

To solve this, we analyze each option by referring to the text. The text says "Lodestones, like the one pictured here, are permanent magnets. This means that they create their own magnetic fields."

• Option 1: The text doesn't mention lodestone formation via volcanic eruptions, so this is incorrect.
• Option 2: The text doesn't define permanent magnetism as being long - lasting and hard to remove, so this is incorrect.
• Option 3: This matches the text's description of lodestones as permanent magnets (creating their own magnetic fields), so this is correct.
• Option 4: The text states lodestones create their own magnetic fields (not just near steel), so this is incorrect.

Answer:

C. Lodestone continuously produces it own magnetic field