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Word formation CEFR B2 Topic: Freediving and the body's underwater dive reflex

Word Formation: The Science of Freediving

What this tests: word building — prefixes, suffixes, negative forms and changing a word's part of speech.

Instructions

For questions 1–8, use the word in capitals at the end of each line to form a word that fits the gap in the same line.

Freediving—the sport of diving underwater on a single breath—has become INCREASE popular over the past decade, attracting adventurous beginners and seasoned athletes alike.

Modern freedivers now reach AMAZE depths, some exceeding 100 metres without any breathing equipment,

a feat that once seemed utterly BELIEVE.

What makes this possible is the human body's own response to submersion, known as the mammalian dive reflex.

When the face touches cold water, several changes occur almost instantly, all of them entirely BODY rather than psychological:

the heart rate slows, blood vessels in the limbs narrow, and oxygen is redirected towards vital organs.

This remarkable adaptation, shared with seals and whales, allows swimmers to cope with a severe oxygen SHORT for several minutes at a time.

Without adequate guidance, however, divers who ignore warning signs risk a sudden LOSE of consciousness, known as blackout.

For this reason, instructors stress that pushing the body's limits without careful preparation is RESPONSIBLE, no matter how experienced a diver feels.

Rigorous INSTRUCT teaches freedivers to recognise their own limits and respond calmly under pressure.

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🎬 Video walkthrough

This exercise read aloud, sentence by sentence: a pause to answer each question, the hint after the pause, then the answer and why. It gives the answers — try the exercise first.

9 min. All video walkthroughs