Let your kid's knowledge of leaf vocabulary climb as high as a tall, tall tree with this fun word search.

Fly high with The Wright Brothers, two siblings who soared to the forefront of history with their design for the first modern airplane.

Young botanists test their plant know-how with this quiz.

Test your knowledge of prehistoric animals with this life sciences crossword puzzle!

Children put their science vocabulary to the test with this engaging crossword puzzle!

Life on Earth is vast and varied, from high in the sky to the bottom of the sea. Learn more about what lives on Earth with this reading and quiz worksheet.

Test your knowledge of electrical energy with this third- and fourth-grade worksheet!

Does your little gardener know about compost? Test their knowledge of this sensationally smelly earth science process!

Does your child love dogs? Test his knowledge on the different breeds of dog with some trivia questions!

Guinea pigs are social animals that make great pets. Test your child's knowledge of these furry critters with this fun quiz.

Test your little nature-lover's knowledge about our feathery friends. Can she figure out which bird fits each description?

Let your coloring skills blossom with this flower anatomy worksheet. Make your own flower, color and put your vocabulary skills to the test!

Renewable energy is extremely important for the Earth's future! Test your child's knowledge of renewable resources with this review sheet.

Are you aware of how many endangered species there are in the world? Use this trivia sheet to test your knowledge of some beautiful but endangered animals.

Learn Jupiter facts in this worksheet. Your child can test his knowledge of the solar system by answering the trivia question at the bottom of the page.

Nature is all around us! But how much does your child know about our natural world? Test her knowledge with some nature fun-facts trivia.

Put your kid's observational skills to the test with this word search that will help her learn some of the animals that inhabit a rainforest.

Earth has many different land and water features—can you recognize them? Test your knowledge with this crossword puzzle for third and fourth graders!

Test your third grader's biology knowledge with this worksheet, which challenges him to separate invertebrates from animals with a backbone.

Test your child's science savvy with this worksheet, which asks your child to identify what items are made from plants.

Looking for a fourth grade worksheet to help your kid with science? This printable will test his knowledge of the water cycle.

Do you know the functions of the primary organs in the human body? Put your knowledge to the test with this fourth- and fifth-grade crossword!

What is a plateau? What's the difference between a butte and a mesa? Look at these three land forms and learn to tell them apart with this worksheet.

Is your fourth grader learning about electricity? This worksheet is all about circuits, tests her skills and reinforces the concept of how a circuit works!

This worksheet features a scientific explanation and awesome photos of solar eclipses, which are extremely rare scientific phenomena.

Looking for a worksheet to help your kid with science? This printable will help him with his knowledge of geology.

Learn how sand dunes form, and a little bit about desert formations like yardangs as well, in this science summary sheet.

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.

Learn about the badgers that live in Yellowstone National Park.