Matching Pairs ATEROIDSOnline version B2 UPPER INTERMEDIATE by MIRYAM AIMEE PEREZ SANTIAGO 1 an orbit 2 an asteroid 3 to track 4 to be unaccounted for 5 hazardous 6 to pick up 7 to log 8 infrared to notice to record or make note of something dangerous to be in an unknown location to follow the movement or progress of something a rock that flies through outer space the path of an object around a planet a kind of light humans can’t see without special glasses