Edge Crossword
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
                            
 
 
Down: 1) A community and its physical environment together3) a structure or feature of an organusm that helps it meet a particular need in its natural habitiat4)  An organism in a community that must eat to get the energy it needs5)  change in motion caused by unbalanced forces or a change in velocity6)  A device that is made up of two or more simple machines9)  The first force in the third law of motion11)  tiny living cells that “fix” nitrogen in the soil 13) The ways in which the organisms in an ecosystem interact with one another according to what they eat16)  A large-scale ecosystem Across: 2)  The ability to float in a liquid or rise in a gas7) A push or pull that causes an object to move, stop, or change direction8) Consumers that break down the tissues of dead organisms10)  The forces acting on an object that are equal in size and opposite in direction, canceling each other out12) The property of matter that keeps it moving in a straight line or keeps it at rest14) A flat, sloping surface15)  All the populations of organisms living together in an environment17) The force that pulls all objects in the universe toward one another18)  A force that opposes, or acts against, motion when two surfaces rub against each other19) The contest among organisms for the limited resources of an ecosystem
 

 

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