This trailer for Steven Spielberg's Jurassic Park realistically depicts some of the dinosaurs present during this period.
PracticePractice Mesozoic Era - The Age of Dinosaurs questions
Levels are CK-12's student achievement levels.
BasicStudents matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient)Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
AdvancedStudents matched to this level are ready for material that requires superior performance and mastery.