---
title: Day and night — a lesson of Mova's school · trees and pragmatics
description: «Day and night», a lesson of the world course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: The Earth is a huge ball that spins around an imaginary line through its middle, called its axis.
---

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# Day and night

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Lesson 1 of the world course of Mova's primary school: 14 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0). How Mova does on its tests: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/world/1-day-and-night/).

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- [0](https://md.mova.elamur.ai/free/en/corpora/school/world/1-day-and-night/0/) — The Earth is a huge ball that spins around an imaginary line through its middle, called its axis.
- [1](https://md.mova.elamur.ai/free/en/corpora/school/world/1-day-and-night/1/) — The Sun shines on only one half of the ball at a time: that half has day, and the other half, turned away from the Sun, has night.
- [2](https://md.mova.elamur.ai/free/en/corpora/school/world/1-day-and-night/2/) — As the Earth spins, every place is carried from the dark half into the light half and back again, once in 24 hours.
- [3](https://md.mova.elamur.ai/free/en/corpora/school/world/1-day-and-night/3/) — The Sun seems to rise in the east and set in the west because the Earth turns from west to east, the way trees seem to run backwards when you look out of a moving train.
- [4](https://md.mova.elamur.ai/free/en/corpora/school/world/1-day-and-night/4/) — Try it with a torch and a ball in a dark room: spin the ball slowly and watch a sticker on it pass from light into shadow.
- [5](https://md.mova.elamur.ai/free/en/corpora/school/world/1-day-and-night/5/) — The Earth spins around its axis once in about 24 hours.
- [6](https://md.mova.elamur.ai/free/en/corpora/school/world/1-day-and-night/6/) — At any moment one half of the Earth is lit by the Sun and has day.
- [7](https://md.mova.elamur.ai/free/en/corpora/school/world/1-day-and-night/7/) — The half of the Earth turned away from the Sun has night.
- [8](https://md.mova.elamur.ai/free/en/corpora/school/world/1-day-and-night/8/) — The Sun does not go around the Earth to make day and night.
- [9](https://md.mova.elamur.ai/free/en/corpora/school/world/1-day-and-night/9/) — The Earth turns from west to east.
- [10](https://md.mova.elamur.ai/free/en/corpora/school/world/1-day-and-night/10/) — Because of the turning, the Sun seems to rise in the east and set in the west.
- [11](https://md.mova.elamur.ai/free/en/corpora/school/world/1-day-and-night/11/) — When it is midday in one country, it is midnight on the opposite side of the Earth.
- [13](https://md.mova.elamur.ai/free/en/corpora/school/world/1-day-and-night/13/) — The stars are in the sky during the day too, but the bright sunlight hides them.
- [14](https://md.mova.elamur.ai/free/en/corpora/school/world/1-day-and-night/14/) — The line between the lit half and the dark half moves around the Earth as it spins, bringing sunrise and sunset.

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- next →: [The seasons and the tilt of the axis](https://md.mova.elamur.ai/free/en/corpora/school/world/2-seasons-and-the-tilt/)
- ↑ back to [World](https://md.mova.elamur.ai/free/en/corpora/school/world/)