This Earth Day, learn about conservation and the environment while you enjoy solving a fun puzzle! 

Learn all about your body's most important muscle: your heart! This simple diagram is a great way to introduce your little biologist to his heart.

Together, water and photosynthesis are the source of all life on Earth! Little curious minds will enjoy discovering the ins and outs of photosynthesis.

Children learn about the food cycle in a rain forest as they color in a scene of snakes, butterflies, leopards, and other forest-dwelling creatures.

Budding scientists will learn about the density of salt water and perform an experiment with food coloring, salt water, and fresh water.

Help students deepen their understanding of matter with this chemisty worksheet!

Investigate the practice of deforestation in a real-world context with this two-page environmental science worksheet.

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.

Practice geology vocabulary with this challenging crossword puzzle.

Energy is a crucial part of physical science! All things on Earth have energy, whether it's potential or kinetic.

Hypothesis, observation, data...with so many terms, learning the scientific method can be tricky. Learn the steps by helping Dr. McSquare sort out his reports.

Students compare structures in the bodies of different organisms in order to draw conclusions about evolutionary relationships in this life science worksheet!

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

Students read about genetic mutations in order to understand how mutations affect organisms in this engaging life science worksheet!

Introduce students to the first step of the engineering design process with this helpful graphic organizer! 

This Awesome Anatomy coloring page is all about the human eye, and makes a handy study tool as well!

Learn all about hurricanes in this earth science Q&A.

Which comes first, genus or phylum? To complete this life science crossword, kids need to put the 9 levels of biological classification in the correct order.

Teach your little scientist the difference between physical and chemical changes, on a molecular level.

Explore the impact of urban development in this engaging environmental science worksheet for middle grades!