The rate of erosion of continents is measured by the:

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.