adaptation atomosphere balance scale
stationary object survival universe
resistance revolution rotation scientific
decomposer density deposition direction
conservation constellation consumer
physical change position producer protest
erosion evidence force fossil friction
fulcrum galaxy hypothesis igneous rock
microscopic mineral motion organism
inclined plane inherited traits insulator
chemical change classification conductor
method sediment sedimentary rock speed
pulley reflection refraction reproduce
earthquake electrical circuit electricity
lever magnetic metamorphic rock
variable volcano wheel and axle