| A | B |
| diagram | a drawing or chart |
| dome-shaped | shaped like an upside-down bowl |
| astronaut | a person trained for space travel |
| moon base | a building used by astronauts to sleep on the moon (a moon motel) |
| chamber | small room |
| airlock | a room in-between inside and outside to equalize pressure,etc |
| clumsily | awkwardly, without grace |
| two-way radio | radios that allow 2 people to hear and talk with each other |
| sesame | a "magic" word |
| gravity | natural force that pulls mass down |
| moon buggy | a "car" used by astronauts on the moon |
| crater | deep bowl-like depression in the ground |
| bronco | a bucking wild horse |
| telescope | an instrument that makes distant objects appear closer and larger |
| meteorite | rock that falls from space |
| visor | the clear part of a helmet to see through |
| jet pack | a jet-powered backpack used by astronauts to "fly" around |
| bulky | large, thick |
| constellation | group of stars |
| Camelot | legendary land of King Arthur in England |