I'll give you some of them, but I want you to promise to look them up, either on line or in a book, and read more about them, even after you have the answers.
This whole sheet is talking about the "states" of matter, and changes between the states.
There are three "states" of matter: -- solid like ice -- liquid like runny water -- gas, like steam
1). When a substance changes from one to another, that's a "change of state".
2). Which of these states has a definite shape and volume ? (It doesn't make puddle, and it doesn't fill up the room. It's "solid".)
3). You know this one. What is it when ice changes to runny water ?
4). Which state can you put into a jar, and it gets round like the jar but it doesn't fill up the jar ?
5). You know this. What is it when runny water changes to ice ?
6). Which state fills up anything you put it into ?
7). I don't know this one. It's either endothermic or exothermic. I can never get these straight.
8). Same as #6. Which state fills up anything you put it into ?
9). I don't know the term that includes both boiling and evaporation.
10). This is the opposite of #7. As I said, I can never get these straight.
11). Changing from a gas to a liquid, like steam to water, or breathing fog onto a mirror, is "condensation".
12). This is interesting. If you have a lump of dry ice on the table and it melts, there's no puddle around it ! It goes directly from solid to carbon dioxide gas, and never forms liquid. That process is called "sublimation", and we say that the dry ice "sublimes".
Each time you exhale, you are releasing carbon dioxide gas (CO2) into the atmosphere. Animals and plants get rid ofcarbon dioxide gas through a process called respiration. Carbon moves from fossil fuels to the atmosphere when fuels are burned.
This type of spectrum is called line emission spectrum . Because it consists of lines . It is emission spectrum because it is due to emission of radiation from a source .
b ) The wavelength of a photon is inversely proportional to its energy . Photon due to transition between n = 1 and n = 3 will have higher energy than
that due to transition between n = 2 and n = 5 . So the later photon ( B) will have greater wavelength or photon due to transition between n = 2 and n = 5 will have greater wavelength .
