Chapter 21 Science VOCAB Crossword
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
 
 
Down: 2) a type of chemical reaction that occurs when a substance reacts with oxygen to produce energy in the form of heat and light3) chemical reaction that requires heat energy in order to proceed4) chemical reaction that produces a precipitate, water, or a gas when two ionic compounds in solution are combined5) substance that speeds up a chemical reaction without being permanently changed itself7) in a chemical reaction, the new substance that is formed9) number in a chemical equation that represents the number of units of each substance taking part in a chemical reactions12) substance that slows down a chemical reaction or prevents it from occurring by combining with a reactant13) in a chemical reaction, the substance that reacts Across: 1) shorthand method to describe chemical reactions using chemical formulas and other symbols6) the loss of electrons from the atoms of a substance8) insoluble compound that comes out of solution during a double displacement reaction10) chemical reaction that requires energy input (heat, light, or electricity) in order to proceed11) chemical reaction that releases some form of energy, such as light or heat14) chemical reaction in which energy is primarily given off in the form of heat15) process in which one or more substances are changed into new substances16) a chemical equation with the same number of atoms of each element on both sides of the equation17) chemical reaction in which two or more substances combine to form a different substance18)  chemical reaction in which one substance breaks down into two or more substances19) chemical reaction in which one element replaces another element in an compound20) the gain of electrons by the atoms of a substance
 

 

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