Why do some objects make loud sounds when dropped, while others make quiet sounds?

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

Children put their science vocabulary to the test with this engaging crossword puzzle!

Test your knowledge of electrical energy with this third- and fourth-grade worksheet!

Is your little one into creepy crawlies? Test his bug knowledge with a fun crossword puzzle.

Put your prediction proficiency to the test in this third-grade physical science worksheet!

Does your little gardener know about compost? Test their knowledge of this sensationally smelly earth science process!

Test your memory skills as you review the different types of animal body coverings with this animal memory match game!

Can your little geologist identify the three main types of rock? Test his earth science savvy with a matching activity.

Guinea pigs are social animals that make great pets. Test your child's knowledge of these furry critters with this fun quiz.

Test your little nature-lover's knowledge about our feathery friends. Can she figure out which bird fits each description?

Renewable energy is extremely important for the Earth's future! Test your child's knowledge of renewable resources with this review sheet.

Has your child learned about the life cycle of a frog in school? Test his understanding with this cute cut and paste worksheet.

Nature is all around us! But how much does your child know about our natural world? Test her knowledge with some nature fun-facts trivia.

Put your kid's observational skills to the test with this word search that will help her learn some of the animals that inhabit a rainforest.

In this science matching worksheet, children will test their solar system know-how by matching each celestial body to the correct fact.

Earth has many different land and water features—can you recognize them? Test your knowledge with this crossword puzzle for third and fourth graders!

Looking for quiz questions to test your first grader's general knowledge? This printable will challenge your kid's overall knowledge.

Test your third grader's biology knowledge with this worksheet, which challenges him to separate invertebrates from animals with a backbone.

Test your child's science savvy with this worksheet, which asks your child to identify what items are made from plants.

Looking for a fourth grade worksheet to help your kid with science? This printable will test his knowledge of the water cycle.

This experiment requires only lemon juice, salt, sugar and grapefruit. Your budding scientist can get a great introduction to science by testing her own tongue!

This worksheet tests kids' understanding of basic heredity by asking them to match parent turtles with their offspring based on similar traits.

This worksheet features a scientific explanation and awesome photos of solar eclipses, which are extremely rare scientific phenomena.

Learn about the badgers that live in Yellowstone National Park.

Read about the mule deer, the most abundant deer in Yellowstone National Park.

How much do you know about our home planet? Boost your Earth knowledge with this science printable.

Every living thing needs a home to survive! Many animals have unique and interesting ways of building their homes.

Jump-start your kid's excitement about kangaroos! Together, you can learn some cool kangaroo facts, like how kangaroos can jump up to 30 feet.

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!