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