Exercice 33, Sondage de rails : 1. Citer les transformations physiques et les trans-
formations chimiques évoquées dans le doc. 1.
2. Le procédé met en jeu deux réactions dont les
équations sont :
1 2 Mg + 02—2 Mgo (allumage de la mèche)
2 Fe2O3 + 2 Al G2 Fe + Al203 (soudure)
Attribuer un nom à chacun des éléments chimiques
repérés en gras dans les équations de réaction.
Livret fiche 13
3. a. Quel est le métal formé qui vient combler l'es-
pace entre les rails?
b. Justifier que ce métal est à l'état liquide.
Donnée :
Température fusion du fer : Trus(Fe) = 1 538 °C.

What statement goes against the kinetic theory of gases

(04.05 hc) analyze the given diagram of the carbon cycle below. an image of carbon cycle is shown. the sun, a cloud, two trees, one on the left and the other on the right, an animal, lake, and a factory are shown in the image. an arrow is shown from the sun towards the left tree marked a. the sun is marked b. there is an arrow from the air above the clouds, marked c, towards the left tree. an arrow from a location close to the ground marked d points towards dead organisms, which is a label under the animal. an arrow marked e points from the right tree straight up to the clouds. an arrow marked f points from the animal straight up to the clouds. an arrow marked g points from the factory towards the air above the clouds, c. there is an arrow pointing from the air to the lake labeled carbonates in water, an arrow pointing down from dead organisms to fossils and fossil fuels, and an arrow from fossils to the factory. part 1: which compound does c represent? part 2: name a process that could release this compound into the air. part 3: explain how the elements that form it are conserved during the carbon cycle. use complete sentences to explain your answer.

People who practice which of the following diets may run the risk of not getting enough iron. a. gluten free or vegan diet b. diet for managing diabetes c. vegan diet d. gluten free diet