In this introductory tree-diagramming worksheet, young naturalists will unscramble each label to reveal five parts of the tree.

This Earth Day quiz family and friends with this true or false questionnaire. It's all in good, informative, fun!

Whether you say buffalo or bison, it is still the largest land mammal in North America. Discover a bit more about this majestic animal.

The California condor has been brought back from the brink of extinction. This worksheet will help your little bird lover learn all about the condor.

The grizzly bear once roamed across most of North America; now its habitat has shrunk to the northwest. Discover more about the grizzly with this worksheet.

Teach your child how to respect the ecosystem with a science worksheet that doubles as a coloring page. Can they identify the sources of pollution in the scene?

The silverback gorilla is a special animal. This magnificent male is part of an endangered species. Complete this sheet to learn all about this gentle giant.

The horned lizard has a scary exterior but a gentle personality. Your little student can learn about this North American lizard with this worksheet.

Color in the gold and red colors of this common grasshopper species and learn about insect orders with your child!

A fun challenge for kids, this Earth Day crossword puzzle is a great way to review facts about the Earth and get a reminder on how to live green.

Get in tune with nature, and read a bit about an endangered species of animal, the Black-footed Ferret. Your child can color an illustration as he reads.

Help your child understand why it's so important to take care of the environment with this info-sheet about an endangered species: the spectacled bear.