Our understanding of the atom has changed over the past few hundred years! Read about a few different theories on the structure of an atom.

Learn the basic structure of an atom with this introductory page, complete with a fun experiment they can try at home!

Students learn about the relationship between the structure and function of cell walls and cell membranes in this engaging life science worksheet!

Check out the structure of a bone in this "Inside-Out Anatomy" worksheet.

Students demonstrate their knowledge of the structure of animal cells in this middle grades life science worksheet!

Students demonstrate their knowledge of the structure of plant cells in this middle grades life science worksheet!

Teach your fifth grader about this important bony structure with a fill-in-the-blank skull diagram.

Students take a deep dive into the structure of animal cells in this middle grades life science worksheet!

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

Have you ever heard of a bird building a structure of sticks and leaves in order to attract mates? You have now.

Introduce your child to the building blocks of life: DNA! This coloring page features a double helix structure, or a DNA strand.

Encourage students to take a deeper dive into the structure of plant cells in this middle grades life science worksheet!

How much does your child know about the structure of his stomach? Learn a bit about this important organ with an informative anatomy sheet!

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.

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

What do a raven, a bat, and a wolf have in common? Similar skeletal structures! In this Halloween worksheet, middle-grade students will explore homologous structures in different animals. 

Budding biologists, here's a great cheat-sheet to help you memorize and compare the structures of both animal cells and plant cells.

There are a lot of structures that make up a new plant, called a seedling. Your child will learn what they're called with this life science word search.

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

Learn about the most vital of vital organs in this "Inside-Out Anatomy" worksheet.

Our solar system might fit on this cool coloring page, but in reality it's 3.7 billion miles from the Sun to the dwarf planet Pluto!

Kids practice identifying solids for a lesson on the states of matter in this 1st grade physical science worksheet.

Learn how seeds move with this second- and third-grade matching activity!

An animal cell is made up of many different organelles—color them all in this middle-grade worksheet! 

Peek into the life of a praying mantis in this informative worksheet!

Learn all about charging by friction with this fascinating science worksheet for middle grades!