Astronomy2 Crossword
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
 
 
Down: 2) a nuclear reaction in which a heavy nucleus splits spontaneously or on impact with another particle, with the release of energy.4) a material system in which mass or energy can be lost to or gained from the environment.5) the branch of science concerned with the processes and phenomena of the atmosphere, especially as a means of forecasting the weather.6) a nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus with the release of energy.8) a structure or arrangement of something.10) the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat11) a series of events that are regularly repeated in the same order. Across: 1) the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization.3) the action of traveling in or through an unfamiliar area in order to learn about it.7)  the frozen water part of the Earth system. 9) can be defined as interactions between the human social system and (the “rest” of) the ecosystem. 12) a physical system that doesn't exchange any matter with its surroundings, and isn't subject to any force whose source is external to the system.13) the degree of compactness of a substance.
 

 

Create your own Crossword Puzzle for Free!		  Show Errors as I Type