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