Use clues to fill in the boxes in this crossword puzzle, and learn more about freshwater fish along the way.

Learn more about what lives--and what thrives--in marshes with this fill-in-the-blank worksheet on marsh ecosystems.

Learn about a famous woman of science, Rosalind Franklin, and how she contributed to the discovery of DNA's double-helix structure.

What is the purpose of a narwhal tusk? Explore some interesting new findings about the narwhal, also known as the unicorn whale.

If your child is starting to learn human biology, give him a great study sheet with this anatomy worksheet about the pancreas.

There's not much in the animal kingdom more interesting than tentacles with suckers! Learn about octopus anatomy with this worksheet.

Did you know you're 1,000 times more likely to drown than you are to be bitten by a shark? This fun worksheet is jam-packed with fun facts about the shark!

Just like the rest of our body, our eyes are a complicated system! Learn about how the human eye works with this anatomy sheet.

Got a gardening guru on your hands? Give them a fun challenge with this fill-in-the-blanks quiz about the parts of a seed!

Learn about the animal kingdom with this centipede anatomy worksheet. Fun fact: Centipedes have either 15 or 17 pairs of legs, but never 16!

Read about the intestines, an important part of our digestive process. Your child will see a diagram of this body organ and learn important terms and concepts.

Did you know our sense of smell is also called "olfactory"? Learn about the structure and function of the nose with this human anatomy sheet.

How cool are chromosomes? Read what Steve the savvy scientist has to say about chromosomes and genes before testing your knowledge with some fill-in-the-blanks.

This Louis Pasteur biography goes over his accomplishments, and includes a bacteria-based science activity at the end!

Fifth-grade learners will look at a diagram of a cell, then follow the instructions to label its parts by color.

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!

Kids learn important plant and animal cell vocabulary as they plug the words into their correct spots and complete the puzzle.

Where is the liver located? Using the diagram as a reference, kids cut out the different parts of the liver from this worksheet and piece them together.

With this enlightening worksheet, kids will get a glimpse into how our brains' different parts function in surprising ways.

Discover the details of desert plant life in this informative worksheet!

How does our hearing work? Give your child a great guide to the anatomy of our ears with this anatomy worksheet.

Color in this diagram to see how a tree works and to better understand how many plants transport their "food".

How does our sense of taste function? Introduce your child to the anatomy of our tongue with this diagram and info sheet.