Why Did Mammals Take Over? — A Cenozoic CER
Interactive worksheet with auto-grading, instant feedback, and printable PDF.
- Format
- Interactive (Online), Printable (PDF)
- Grades
- 5678
- Subjects
- sciencesocial-studieshistory
- Standards
- NGSS MS-LS4-1 (SUPPORTING); CCSS.ELA-LITERACY.RH.6-8.1; C3 D2.HIS.16.6-8 (SUPPORTING)
What's included
About this worksheet
Turn the story of the Age of Mammals into real reasoning with this standalone claim-evidence-reasoning worksheet for grades 5-8. No reading passages required — everything students need is built right in, so it drops into any Cenozoic Era unit.
Students answer one focus question: What allowed mammals to become the dominant land animals of the Cenozoic Era? They build a Claim, choose supporting Evidence from a six-clue Evidence Bank, and explain their Reasoning. The bank includes two plate-tectonics distractors, so students must judge which clues are actually relevant — the analysis skill that recall worksheets never ask for.
Bolded sentence starters scaffold the writing, and generous lines give room for full responses. A complete answer key identifies the correct clues, flags the distractors, and models sample Claim, Evidence, and Reasoning statements. The clean, ink-light design keeps the key easy to print.
Covers the mass extinction, adaptive radiation, and the climate shift that opened new habitats. Aligned to NGSS MS-LS4-1, CCSS RH.6-8.1, and C3 D2.His.16.6-8. Just print and teach.
Perfect for the way you teach
- Assign in one click
- Track progress per student
- Auto-graded results
- Practice at home
- Print or do on-screen
- Build skill mastery
- Standards-aligned
- Self-paced
- Ready-to-use today