rub your balls
Paper plates are made of byproducts of the paper making process. Cellulose, oil, resin and various wood chemicals. The designation paper plates generally refers to all disposable plates. 57% of so called "paper plates" are made of polystyrene, which although not biodegradeable us much less energy to manufacture.
It all depends on the way in which the iron's 'domains' are aligned. Iron is inherently magnetic as a material, but can become demagnetized as time goes on, due to sudden impact or when affected by another magnetic source. For iron to become magnetized 'domains' need to be in parallel with each other so the magnetic field created all flows in the same direction. An unmagnetized iron source has all of its domains misaligned A brief explanation of domains are a series of positive and negative charged atomic particles within the iron itself which behaves much like tiny magnets themselves.
The attractive forces holding the molecules of silver iodide together (intermolecular forces) are stronger than those in vanillin, therefore they require more energy to break them. The attractive forces between two molecules of silver iodide are much stronger than the attractive forces between two molecules of vanilin. This is due to the different types of bonds found in each molecule - silver iodide molecules contain ionic bonds, which are very strong, while vanilin molecules contain covalent bonds which are a lot weaker. Since the attractive forces are higher in silver iodide, it requires a lot more energy (i.e. heat) to break these attractive forces in order to melt silver iodide, therefore it has a much higher melting point than vanilin. The bonding of atoms.
AIR!!! well , you see, air is there, but is actually carbon dioxide and oxygen. We breath in oxygen and produce carbon doixide. There are also other substances in the air, such as car exhausts (also carbon dioxide, amongst others, like nitrous oxide, carbon monoxide et al) and others from the chemical works. I hope this helps you on your way to learning!! Gym teachers know why!! To fill up basketballs and volleyballs... (loosly quoted from a Bill Cosby comedy routine.) "Why is there air" is an album of Bill Cosby which won the Grammy Award for Best Comedy Album in 1996.