What causes the earth’s magnetic field? a. currents in the earth’s liquid-metal outer core b. the mineral composition of the earth’s crust c. molten material in the mantle d. magnetic particles located at the earth’s poles question resources\

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.