a dry leaf is crushedgrass in the yard is cutchemistry book is burneda bar of copper is formed into wirerusting of ironif it doesnt undergo physical change, then why does it undergo chemical change?please explain your answers. the explanation is more important. PLEASE explain it in FULL and DETAILED.thank you.
*.A crushed dry leaf is simply fragments of the same substance and is a Physical ChangeNo Chemical Reaction. *.Cut grass is still grass.Physical.no Chemical change. *.Burning is a Chemical reaction. The book (paper) is a fuel and burning is a chemical reaction forming new substances.CO2, C (Black Carbon remnants) and Water vapour. *.Copper extruded to a length of wire remains as Copper.same substance.Physical change. *.Rusting is like a very slow combustion process where the Iron becomes Oxidised to Red Iron Oxide Hydrate .Fe2O3.xH2OA Chemical Reaction. (' x ' represents a varying amount of water).
One simply divides the dry leaf substance into smaller pieces The same for Leaves of Grass A polymer of glucose called cellulose reacts with oxygen to form CO2 + H2O A big one is made into a long, narrow one. Iron reacts with oxygen to form iron(III) oxide. It is unwise to try to erect tall structures using iron(III) oxide.
You are definitely spoiling him a little. Get rid of the video games, and if he asks what happened to them, say that you were talking to a doctor (or someone he would believe) who said that if he continued playing video games, he could die and won't be able to eat peanut butter jelly sandwiches. You mentioned that he was obese.I would suggest buying less peanut butter and jam. Keep your son's favorite food items a place where he can not reach it or find it. Change the type of food you usually eat so he can develop a different eating habit. I think the most important thing you should do is to WARN him. If he does not brush his teeth, show him pictures of what would happen to his teeth. Tell him that if he eats too much, he will become very big.and show how big by using your hands. Teach him a random lesson that tells him if people lie, no one will believe them, just like the Boy and the Wolf tale. If he gets out of control.lock him up in a room. I had a disease that made me a little insane like you son before, and my parents had locked me up in a room so I could chill. You should consult a psychologist. They know the best way to deal with your son in the healthiest way. Good luck and I hope your son develops a better personality later on as he grows older.
