6 lists for Grade 9, 60 words in all. Open a list to see every word, or start a game with it straight away.
genetics · gene · mutation · natural selection · species
climate change · greenhouse effect · carbon footprint · ecosystem services · conservation
ambiguous · contemporary · controversy · dilemma · empirical
imperialism · colonialism · nationalism · industrialization · capitalism
quadratic · parabola · vertex · axis of symmetry · roots
however · therefore · although · moreover · furthermore