TOEFL Reading Complete the Words Practice #009 - Mapping the Ocean Floor

Complete the Words designed to build passage comprehension, evidence use, and efficient reading decisions.

1 questionsAbout 3 minutesmedium

What you will practice

Reading comprehension
Evidence and inference
Time management

Topic: Earth Science · Complete the Words

Passage preview

The deepest parts of the ocean cannot be mapped efficiently with ordinary cameras because darkness, pressure, and suspended particles limit visibility. Research vessels instead use sound. A sonar system sends pulses downward and measures how long their echoes…

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