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