| A | B |
|---|
| astronaut | a member of the crew of a spacecraft |
| emergency | a sudden need for immediate action |
| globe | the earth; world |
| launch | to push out or put forth into the air |
| unusual | not common |
| weighed | measured by weight |
| atmosphere | the air that surrounds the earth |
| orbiter | something that orbits, especially an artificial satellite |
| oxygen | a gas without odor, taste, or color that forms about one-fifth of the air and one-third of water |
| pressure | the continued action of a weight or force |
| shuttle | a space shuttle |
