Grade 3 Science Unit 3 Crossword
                                  
                                  
                                  
                                  
                                  
                                  
                                  
                                  
                                  
                                  
                                  
                                  
                                  
                                  
                                  
                                  
                                  
                                  
                                  
                                  
                                  
                                  
                                  
 
 
Down: 1) a solid, nonliving substance found in nature3) a resource that can be replaced or used again and again4) a rock that forms when melted rock cools and hardens8) a kind of rock that forms from layers of sediment9) a mixture of minerals, weathered rocks, and decayed plant and animal matter10) the trace or remains of something that lived long ago Across: 2) a kind of rock that has been changed by heating and squeezing5) a material on Earth that is necessary or useful to people6) a material that is burned for energy7) decayed plant and animal material in soil11) what happens when harmful materials get into water, air, or land 12) a resource that cannot be replaced or reused easily
 

 

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