magnetic food chain renewable resource
dispersal vertebrate adaptation water
physical change decomposer structures
mammals weathering condensation
magnetism nonrenewable resource balance
evaporation rock ecosystem expand
producer renewable solution mixture
pollination solar system experiment
conservation solution vibrations
kinetic energy herbivore erosion
community migrate reptiles sound
endangered environment investigation
extinct metamorphosis amphibians
cycle contract potential energy consumer
equator revolution invertebrate
population experiment germinate
rotation traits carnivore mixture
axis environment investigate system