Acompass works because it interacts with earth's

answer:

magnetic field

explanation:

a compass works by detecting the earth's natural magnetic fields. the earth has an iron core that is part liquid and part solid crystal due to gravitational pressure. it is believed that movement in the liquid outer core is what produces the earth's magnetic field.

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answer:

compasses are mainly used in navigation to find direction on the earth. this works because the earth itself has a magnetic field which is similar to that of a bar magnet (see the picture below). the compass needle aligns with the earth's magnetic field direction and points north-south.

explanation:

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

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the answer is d.) potassium