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

Learners will use a word bank to label 15 parts of the human digestive system in this life sciences diagramming activity.

There's a lot happening beneath the waves, including the ocean food web. Take a closer look with this colorful printable.

If you push your little brother, does he push back? Well, according to Newton's third law of motion, he does!

Test your knowledge of the periodic table of the elements with this quiz page!

It's a bird! It's a plane! It's Physics Man! Test your knowledge of the physical world with this fun questionnaire that takes physics to a super-heroic level.

This diagram of a human skeleton is labeled with 12 major bones, from skull to fibula.

Introduce your flashlight to mirrors. Mirrors are cool surfaces that reflect light just as well as they reflect your face.

Did you know that sound is actually caused by movement? Vibrations of particles create the sound that we hear.

What is the difference between condensation and evaporation? Learn about natural cooling and heating processes that are caused by changing states of matter!

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

Discover the function and parts of the human skeleton with this introductory diagram.

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

Sink or float? Your kid may be surprised to learn that the density of coke and diet coke aren't the same!

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

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

Get familiar with this food chain pyramid, from carnivores and herbivores to producers and decomposers; each group has a role.

Dragonflies are some of the oddest looking insects in the world, so it's appropriate that they have so many unique characteristics. Read all about them!

Little biologists will use this respiratory system diagram to identify the most important parts of the human respiratory system and their functions.

Fill in the blanks from the words listed in the word bank, then keep this sheet handy to prepare for tests and quizzes on life science and photosythesis.

Learn more about the animals in the swamp food chain, and find out how each living thing in a swamp ecosystem needs another to survive.

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

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!

Studying human anatomy? Here is a great sheet that shows a diagram of all the muscle system. Your child will learn the scientific terms of the major muscles.

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

You have over 600 muscles in your body! Kids can try this muscle anatomy word search featuring 14 important muscles.

Find out more about single-cell organisms with this coloring page and diagram.

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.

Learn all about the different jellyfish and then test your knowledge with the questions at the bottom of the page.

For all you mad scientists, here is a helpful lab safety 101! You'll get to read a few basic rules, and then complete a word search.