IR4.6 Mariana Trench

a long, narrow groove or ditch

• trench
• organism
• exploration
• depth
• sonar

the highest part

• summit
• trench
• organism
• exploration
• depth

to do well or be successful

• thrive
• summit
• trench
• organism
• exploration

belonging to a period of time before written history

• prehistoric
• thrive
• summit
• trench
• organism

something that is needed or very important

• vital
• prehistoric
• thrive
• summit
• trench

a quick look

• glimpse
• vital
• prehistoric
• thrive
• summit

something that can go or work under water

• submersible
• glimpse
• vital
• prehistoric
• thrive

to control something from a distance

• remotely
• submersible
• glimpse
• vital
• prehistoric

free and independent; something that controls itself

• autonomous
• remotely
• submersible
• glimpse
• vital

the top part of a mountain

• peak
• autonomous
• remotely
• submersible
• glimpse