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