Sum science things Crossword
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
                                        
 
 
Down: 1) colour change formation of gas temp. change form. of precipitate3) how fast chemical reaction happens4) opposite of synthesis6) minimum amount of energy to start chemical reactions8) chemical reactions that release energy9) not created or destroyed12) planting an idea in someones mind17) add more reactants increase surface area add catalyst stir heat18) reacts to form20) all the elements + compounds right of arrow Across: 2) divide at arrow count elements add coefficients recount elements5) types of chemical reactions7) law o conservation o mass10) # in front of formula, shows how many of the compound there is11) elements+ compounds left of arrow13) 2 elements replace others14) way to represent chem. reaction15) 2 substances form a new substance16) process where substances change to form new substances. Bonds broken, and new substances are formed19) one element replaces another in compound21) take in energy22) decrease concentration decrease surface area add inhibitor cool
 

 

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