Transcript:

Woman: See this big, flat patch of ground? What name would we give it if they grew corn here? That's right! And what would we call it if instead people were playing soccer here? Correct! Now suppose it was full of oil wells. What would we call it then? Jason: I think our teacher takes these field trips way too literally. Woman: Now pretend I had a magnetometer. Who can tell me what that would let me measure?