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