World 6 · Size, Scale and Warm Blood · 11 min · PRO
Warm-blooded vs cold-blooded
Endotherms and ectotherms
PRO · Animal Movers
World 6: Size, Scale and Warm Blood is part of PRO
The first world of Animal Movers is free. PRO opens the other 20 lessons in 5 worlds — simulations, quizzes and all.
PRO includes
- All 60 labs — every world, every lesson
- Practice exams and certificates
$8.33/mo, billed yearly ($99.99) · or $39.99 monthly