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