--- title: Heat moves: hot to cold — a lesson of Mova's school · trees and pragmatics description: «Heat moves: hot to cold», a lesson of the physics course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: Heat always flows from a hotter thing to a colder thing, never the other way, until both are the same temperature. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/physics/23-heat-moves-hot-to-cold/) [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/) / Heat moves: hot to cold # Heat moves: hot to cold Lesson 23 of the physics course of Mova's primary school: 16 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/23-heat-moves-hot-to-cold/). - [0](https://md.mova.elamur.ai/free/en/corpora/school/physics/23-heat-moves-hot-to-cold/0/) — Heat always flows from a hotter thing to a colder thing, never the other way, until both are the same temperature. - [1](https://md.mova.elamur.ai/free/en/corpora/school/physics/23-heat-moves-hot-to-cold/1/) — That is why your hot cocoa cools on the table and an ice cube melts in your warm hand, and why your hand feels cold: it is losing its heat to the ice. - [2](https://md.mova.elamur.ai/free/en/corpora/school/physics/23-heat-moves-hot-to-cold/2/) — Heat travels in three ways: along solid things, as in a metal spoon that gets hot at the handle; carried by moving air or water, as warm air rises from a radiator; and as invisible rays, as a campfire warms your face across the cold night air. - [3](https://md.mova.elamur.ai/free/en/corpora/school/physics/23-heat-moves-hot-to-cold/3/) — Your skin does not measure temperature; it feels how fast heat leaves it, so a metal bench feels colder than a wooden one on the same frosty morning, though both are equally cold. - [4](https://md.mova.elamur.ai/free/en/corpora/school/physics/23-heat-moves-hot-to-cold/4/) — A thermometer is the honest judge: its liquid grows longer as it warms and shrinks as it cools. - [5](https://md.mova.elamur.ai/free/en/corpora/school/physics/23-heat-moves-hot-to-cold/5/) — Heat always flows from hotter things to colder things. - [6](https://md.mova.elamur.ai/free/en/corpora/school/physics/23-heat-moves-hot-to-cold/6/) — Things cool or warm until they reach the same temperature as their surroundings. - [7](https://md.mova.elamur.ai/free/en/corpora/school/physics/23-heat-moves-hot-to-cold/7/) — Metals pass heat along very well, so they are good conductors, while wood and plastic pass heat badly. - [8](https://md.mova.elamur.ai/free/en/corpora/school/physics/23-heat-moves-hot-to-cold/8/) — A metal bench and a wooden bench at the same temperature feel different because metal draws heat out of your hand faster. - [9](https://md.mova.elamur.ai/free/en/corpora/school/physics/23-heat-moves-hot-to-cold/9/) — Your hand feels cold when you hold ice because it is losing heat to the ice. - [10](https://md.mova.elamur.ai/free/en/corpora/school/physics/23-heat-moves-hot-to-cold/10/) — A lid slows the cooling of a hot drink, because less steam escapes. - [11](https://md.mova.elamur.ai/free/en/corpora/school/physics/23-heat-moves-hot-to-cold/11/) — Blowing on soup sweeps away the warm, steamy air above it, so more steam escapes and carries heat away. - [12](https://md.mova.elamur.ai/free/en/corpora/school/physics/23-heat-moves-hot-to-cold/12/) — Warm air spreads out, becomes lighter for its size and rises, while cool air sinks to take its place, so a radiator warms a whole room. - [13](https://md.mova.elamur.ai/free/en/corpora/school/physics/23-heat-moves-hot-to-cold/13/) — A fire and the Sun warm you with invisible heat rays that can cross air and even empty space. - [14](https://md.mova.elamur.ai/free/en/corpora/school/physics/23-heat-moves-hot-to-cold/14/) — Melting needs heat, which is why ice cream on a summer table melts and a cool box with ice packs slows it down. - [15](https://md.mova.elamur.ai/free/en/corpora/school/physics/23-heat-moves-hot-to-cold/15/) — The liquid in a thermometer grows longer as it warms; body temperature is about 37 degrees, and a fever is higher. - ← previous: [Lenses and eyes](https://md.mova.elamur.ai/free/en/corpora/school/physics/22-lenses-and-eyes/) - next →: [Melting, freezing and boiling](https://md.mova.elamur.ai/free/en/corpora/school/physics/24-melting-freezing-and-boiling/) - ↑ back to [Physics](https://md.mova.elamur.ai/free/en/corpora/school/physics/)