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