erosion evidence force fossil friction
earthquake electrical circuit electricity
fulcrum galaxy hypothesis igneous rock
chemical change classification conductor
variable volcano wheel and axle
lever magnetic metamorphic rock
physical change position producer protest
adaptation atomosphere balance scale
conservation constellation consumer
pulley reflection refraction reproduce
microscopic mineral motion organism
resistance revolution rotation scientific
stationary object survival universe
decomposer density deposition direction
inclined plane inherited traits insulator
method sediment sedimentary rock speed
速度 (字/分): 0 | 正確率 : 100%|時間: 01:00
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