Key words

Word 1

CERTIFY

• To officially approve something as meeting a required standard.
• To change something in order to improve it or make it fit a new use.
• Able to be used again instead of thrown away.
• The height of something above the Earth or sea level.

Word 2

MILESTONE

• The height of something above the Earth or sea level.
• An important stage that shows significant progress has been made.
• To change something in order to improve it or make it fit a new use.
• To officially approve something as meeting a required standard.

Word 3

UNCREWED

• Without people on board; operated remotely or automatically.
• Able to be used again instead of thrown away.
• The height of something above the Earth or sea level.
• An important stage that shows significant progress has been made.

Word 4

SALVAGE

• To save something valuable from loss or damage, often after an accident.
• To officially approve something as meeting a required standard.
• Able to be used again instead of thrown away.
• To join two spacecraft together in space.

Word 5

ALTITUDE

• Able to be used again instead of thrown away.
• Without people on board; operated remotely or automatically.
• The height of something above the Earth or sea level.
• An important stage that shows significant progress has been made.

Word 6

DOCK

• The height of something above the Earth or sea level.
• An important stage that shows significant progress has been made.
• Able to be used again instead of thrown away.
• To join two spacecraft together in space.

Word 7

REUSABLE

• The height of something above the Earth or sea level.
• An important stage that shows significant progress has been made.
• Able to be used again instead of thrown away.
• To save something valuable from loss or damage, often after an accident.

Word 8

MODIFY

• To change something in order to improve it or make it fit a new use.
• Without people on board; operated remotely or automatically.
• The height of something above the Earth or sea level.
• To join two spacecraft together in space.