I think it would be the formation of bubbles because, ice melting, something dissolved in water, and sugar crystals forming, are all physical changes. They are still the same components just different physical appearances.
It is 'Je suis à la maison.'
You could say something like "Je pense que ce serait meilleur si les jeunes utiliseraient ses portables moins régulièrement" (I think that it would be better if young people used their phones less regularly) [conditional tense] or "A l'avenir j'espère que les jeunes vont aller à l'extérieur plus" (In the future I hope that young people go outside more) [present and then future] or something about in the past, there not being technology so.. and then expand on the differences? you could say "Quand on était petit" [imperfect tense- past] (when one was younger) to do this, hope this helps :)
I think the french word for drawer is tiroir.
