Entre le crayon et ton cil. Analyse
1. Aux étapes 4 et 6, qu'est-il arrivé à une partie de la lumière
qui frappait la surface inférieure de l'eau ? Quel dispositif
courant est basé sur ce comportement de la lumière ?
2. À l'étape 7, quel changement s'est produit à la surface de
l'eau lorsque tu as frappé le verre ? Voyais-tu toujours le
reflet du crayon?
la
not mise en pratique

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods

a sonic boom is a loud boom that breaks the sound barrier

explanation: