Listen and Repeat

Chemistry lab: safety briefing for a new assistant

Listen to a lab supervisor giving a safety briefing to a new lab assistant.

a chemistry teaching lab: rows of benches with flasks and racks, a fume hood, a sink with an eyewash station, reagent shelves

Play the intro to continue

Exam timing — each sentence plays once, a beep sounds, and recording starts by itself. You get 8–12 seconds before it stops and moves on. No stop button, no replay, no second attempt. Turn this off only to rehearse without the clock.