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

What's the animal that swims upstream? Help your child figure this out with this cold-blooded animal crossword puzzle worksheet.

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!

An energy pyramid is a simple way to graphically show how energy flows in an ecological community; somewhat similar to the food pyramid.

This Thanksgiving, serve up some Thanksgiving science learning and find out all about the chemicals that make up a typical Thanksgiving meal.

"The hip bone is connected to the...?" Sing the song perfectly with the help of this worksheet on the skeletal system!

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.

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!

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.

Introduce children to photosynthesis with this fill-in-the-blanks life sciences worksheet!

Learn how energy changes forms with this fourth- and fifth-grade physical science worksheet!

Become an energy investigator in this electrifying science worksheet!