Why does it work? — everyday science
Comparisons and cause: heat makes the metal grow; iron is strong, but steel is stronger.
New core words in this lesson
currentdiscoveryelectricforceheatinventionironmachinemeasuremetalraysciencesteamsteeltheoryweight
Read the sentences below, then practice the whole lesson with audio.
- 1How does this machine even work?
- 2Science starts with a simple question: why?
- 3Electric current runs through the wire like water through a pipe.
- 4Heat makes the metal grow; cold makes it small again.
- 5The old train ran on steam — fire and water, that's all.
- 6Iron is strong, but steel is stronger.
- 7Every invention starts as a foolish idea.
- 8A theory is a story the facts are happy with.
- 9Force is a push or a pull — that's the whole start of it.
- 10We measure twice and cut once.
- 11The weight of the air is on you right now — feel it?
- 12Light takes eight minutes to get here from the sun.
- 13One ray of sun through the window changes the whole room.
- 14Every discovery was a question first.
- 15The world is a machine, and you may open it.
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.
- Do I need an account, and is it free?
- 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.