--- title: Day and night, and the Moon's faces — a lesson of Mova's school · trees and pragmatics description: «Day and night, and the Moon's faces», a lesson of the physics course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: The Sun seems to climb up in the east and sink in the west, but it is really the Earth spinning towards the east, carrying you round l --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/physics/39-day-and-night-and-the-moons-faces/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Physics](https://md.mova.elamur.ai/free/en/corpora/school/physics/) / Day and night, and the Moon's faces # Day and night, and the Moon's faces Lesson 39 of the physics course of Mova's primary school: 17 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/physics/39-day-and-night-and-the-moons-faces/). - [0](https://md.mova.elamur.ai/free/en/corpora/school/physics/39-day-and-night-and-the-moons-faces/0/) — The Sun seems to climb up in the east and sink in the west, but it is really the Earth spinning towards the east, carrying you round like a passenger on a smooth, silent roundabout. - [1](https://md.mova.elamur.ai/free/en/corpora/school/physics/39-day-and-night-and-the-moons-faces/1/) — Half of the Earth always faces the Sun and has day, and the other half faces away and has night, so when you go to bed in Britain, children in Australia are having breakfast. - [2](https://md.mova.elamur.ai/free/en/corpora/school/physics/39-day-and-night-and-the-moons-faces/2/) — We do not feel the spin because it is perfectly smooth; you only feel motion when it speeds up, slows down or jolts. - [3](https://md.mova.elamur.ai/free/en/corpora/school/physics/39-day-and-night-and-the-moons-faces/3/) — The Moon makes no light of its own: it is always half lit by the Sun, and as it goes round the Earth we see different amounts of that lit half, from a thin crescent to a full Moon. - [4](https://md.mova.elamur.ai/free/en/corpora/school/physics/39-day-and-night-and-the-moons-faces/4/) — The Moon spins exactly once for each trip round the Earth, so we always see the same face, and its far side is not dark at all: it gets just as much sunshine. - [5](https://md.mova.elamur.ai/free/en/corpora/school/physics/39-day-and-night-and-the-moons-faces/5/) — The Earth spins towards the east, so the Sun seems to rise in the east and set in the west; careful watching proved it is the Earth that turns. - [6](https://md.mova.elamur.ai/free/en/corpora/school/physics/39-day-and-night-and-the-moons-faces/6/) — Half the Earth always faces the Sun and has day while the other half has night. - [7](https://md.mova.elamur.ai/free/en/corpora/school/physics/39-day-and-night-and-the-moons-faces/7/) — One spin of the Earth takes about 24 hours and makes one day and one night; long ago the Earth spun faster, and the Moon's pull slowly brakes it. - [8](https://md.mova.elamur.ai/free/en/corpora/school/physics/39-day-and-night-and-the-moons-faces/8/) — At the equator the ground moves at about 1,600 kilometres an hour, but we feel nothing because the motion is smooth. - [9](https://md.mova.elamur.ai/free/en/corpora/school/physics/39-day-and-night-and-the-moons-faces/9/) — The whole night sky seems to turn round one point because the Earth spins; the North Star sits almost above the North Pole and hardly moves, and sailors used it to find north. - [10](https://md.mova.elamur.ai/free/en/corpora/school/physics/39-day-and-night-and-the-moons-faces/10/) — The Moon shines with reflected sunlight; it is always half lit, and we see different amounts of the lit half as it goes round the Earth. - [11](https://md.mova.elamur.ai/free/en/corpora/school/physics/39-day-and-night-and-the-moons-faces/11/) — The Moon spins once for each orbit of the Earth, so we always see the same face; its far side was first photographed by a spacecraft in 1959. - [12](https://md.mova.elamur.ai/free/en/corpora/school/physics/39-day-and-night-and-the-moons-faces/12/) — In an eclipse of the Sun the Moon passes exactly between the Sun and the Earth; the Sun is about 400 times wider than the Moon but also about 400 times further away, so they look the same size. - [13](https://md.mova.elamur.ai/free/en/corpora/school/physics/39-day-and-night-and-the-moons-faces/13/) — An eclipse of the Sun must never be looked at without special eclipse glasses. - [14](https://md.mova.elamur.ai/free/en/corpora/school/physics/39-day-and-night-and-the-moons-faces/14/) — In an eclipse of the Moon the Earth's shadow covers the Moon, and sunlight bent through our air turns it red, as if lit by all the Earth's sunsets at once. - [15](https://md.mova.elamur.ai/free/en/corpora/school/physics/39-day-and-night-and-the-moons-faces/15/) — The Moon is often in the sky in daytime and is bright enough to see; the stars are there too, but the bright sky hides them. - [16](https://md.mova.elamur.ai/free/en/corpora/school/physics/39-day-and-night-and-the-moons-faces/16/) — It is a myth that the far side of the Moon is always dark: "dark" once meant unknown, and at new Moon the far side is in full sunshine. - ← previous: [Rockets, record speeds and motion everywhere](https://md.mova.elamur.ai/free/en/corpora/school/physics/38-rockets-record-speeds-and-motion-everywhere/) - next →: [Seasons and tides](https://md.mova.elamur.ai/free/en/corpora/school/physics/40-seasons-and-tides/) - ↑ back to [Physics](https://md.mova.elamur.ai/free/en/corpora/school/physics/)