Gravity Lesson 6 of the world 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 .
0 Gravity is a pull that every object has on every other object; the more matter (mass) something has, the stronger it pulls. 2 The Moon is falling towards the Earth all the time, but it also moves sideways so fast that it keeps missing: like a ball whirled on a string, it goes round and round, with gravity as the string; if the string snapped, the ball would fly off in a straight line. 3 In the same way the Sun's gravity keeps the Earth and the other planets going around it. 4 Without air, a feather and a hammer fall equally fast: an astronaut tried it on the Moon, and both reached the ground together. 5 Gravity is a pull between all objects that have mass. 6 The more mass an object has, the stronger its gravity. 7 Gravity gets weaker the farther apart two objects are. 8 The Earth's gravity pulls everything towards the centre of the Earth. 9 Weight is the pull of gravity on an object. 10 The Earth's gravity keeps the Moon going around the Earth. 11 The Sun's gravity keeps the planets going around the Sun. 12 Without air, light and heavy objects fall at the same speed. 13 A feather falls slowly on the Earth because the air pushes against it. 14 Even in air, two small solid balls, one heavy and one light, dropped from a low height land almost together, because the air hardly slows them. 15 Gravity also holds the air and the oceans to the Earth. 16 The Moon's gravity pulls on the oceans and helps make the tides, the sea rising and falling along the shore about twice a day. 17 Gravity works in space too; astronauts float because they are falling around the Earth together with their ship. ← previous The Sun as a star and the starsnext → The shape and size of the Earth, the poles and the equator↑ back to World This page in Markdown → https://md.mova.elamur.ai/free/en/corpora/school/world/6-gravity/