B1 · 5 minutes · Science

Why the sky is blue

A short explainer talk about light and colour.

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What you’ll practise

Follow a simple scientific explanation.

Words to know

scatter: To spread in many directions.
particle: A very small piece of something.
sunset: The time when the sun goes down.

Words at this lesson’s level (B1)

At B1, you probably know about 96% of the words in this lesson.

Show 1 word that may be new

rainbow B2Look up

These words are in the recording, so they also help with the answers.

Word levels from the CEFR-J Wordlist 1.5 (Yukio Tono, Tokyo University of Foreign Studies); words not in it count as above B2. Your level is the one you chose in the level guide, otherwise the lesson’s.

Source

Original exercise by Joy English. Synthetic voice: Kokoro-82M (Apache-2.0).

Original script; synthetic narration.

Levels are suggestions. Found a mistake? Tell us through the Contact page.