Don't touch that! — the science test
Lab language: reaction, substance, degree — the words instructions are made of.
New core words in this lesson
acidapparatusburstchemicaldangerdegreedropeffectexpansionflameliquidmassmatchmixedobservationpastepoisonpowderreactionscaleseparatestickysubstance
Read the sentences below, then practice the whole lesson with audio.
- 1Quiet, everyone — today's science test has a bit of danger in it.
- 2All this apparatus has a use — but touch nothing for now.
- 3First observation: the white powder is dry, and the acid is not.
- 4We put a drop of acid on the powder and wait for the reaction.
- 5See that? The mixed substance is turning green — write that down.
- 6Keep the two liquids separate, or the effect will be very different.
- 7Don't get the paste on your fingers — it's sticky and it burns.
- 8The glass is getting hot — is that right?
- 9The scale says twice the mass we need — take some out.
- 10Now a match — one small flame under the glass, and we watch.
- 11Watch the expansion — the warm air inside needs more room.
- 12Too much heat and the glass may burst — go up one degree at a time.
- 13Never put your nose over the bottle — some smells are poison.
- 14And — there it goes! That, everyone, is why we do small tests first.
- 15Chemical science is safe when you go slow — and now you've seen why.
FAQ
- How does this dictation practice work?
- Play a sentence, type exactly what you hear, then press check — Dictation Trainer shows word-level feedback: which words you misheard, misspelled, confused for a homophone, or missed.
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- You can read the sentences here without signing up. To practice with audio and save progress, create a free account — practice runs on Echoes you earn for free, starting with 100.
- What level is this lesson?
- This lesson is graded B1 on the CEFR scale and has 15 sentences. Dictation Trainer lessons start at A1 and climb as the library grows.