trench - A long narrow groove or ditch, summit - The top of something or its highest point, thrive - To grow well and be healthy, prehistoric - To be very old, from a time before history was recorded, vital - To be needed or very important, glimpse - A very quick look at something, submersible - Something that can go or work underwater, remotely - To use something from a distance, autonomous - Something that controls itself,

Module 6 Week 1 Vocabulary

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