How do you think our universe will end? With this worksheet, explore some of the common theories, and then come up with some of your own!

Every four years something funny happens with our calendars -- we add a day! Why do we do this? Discover the science behind leap year.

Meet the red wolf, an endangered species of animal that was once very common, but in the past 50 year nearly became extinct!

Don't let school year learning slip away this summer: use this chemistry worksheet to practice identifying elements.

In 2012, an 80 million-year-old dinosaur was discovered, and you can learn all about this 20-foot, 2-ton horned herbivore.

This changing seasons worksheet helps your child discover how trees change at different times of year. Learn about changing seasons with this worksheet.

Did you know that some caribou travel 3,000 miles in a year? This fun worksheet is jam-packed with fun facts about the caribou!

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

Learn facts about Venus, the planet that shines the brightest in our night sky! Then practice your knowledge of the solar system with bonus trivia at the end.

Did you know new species of animals are discovered every year? Color in this little cricket, the only one of his kind who can pollinate plants!

Write down the name of each season that is shown in the pictures then color them and turn this worksheet into a unique placemat that can be used year-round!

Encourage curiosity and scientific exploration with this engaging and open-ended worksheet!

Budding scientists record their observations with this open-ended magnifying glass template!

Help your preschooler learn how trees change each season with this fun cut and paste worksheet.

Get your preschooler excited about science with this drawing worksheet that asks her to draw a picture of each season.

Get students collecting and analyzing data without leaving the classroom with this hands-on science activity!

Introduce yourself, and get to know others, with this fun science-themed questionnaire!

Learn about the grizzly bears that live in Yellowstone National Park.

Let your little weather observer discover the four seasons! She'll match up each season with its proper picture to show her knowledge of how weather changes.

Discover the science behind an ages-old 4th of July tradition with this firework diagram.

Learn about the Uinta ground squirrels of Yellowstone National Park.

Find out fun facts about Monarch butterflies and create your own colorful butterfly in this worksheet. Then turn it into a pretty placemat!

Grain, dairy, meat, or vegetable? Teach your kids about the food groups with a Thanksgiving-themed cut-and-paste sorting activity.

Seasonal weather postcards get kids to learn some vocabulary and identify the seasons. Learn about spring, summer, fall, and winter with weather postcards.

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

It's easy being green when you have our Earth Day game for a guide. Just print out this Earth Day game and get ready to score one for the planet.

Explore how, when, and why lunar eclipses occur with this two-page earth science worksheet!

How well do you know your laboratory equipment? Find out with this fun matching activity!

Get to know your classroom laboratory equipment with this fun scavenger hunt activity!

Explore your world while making observations and inferences with this engaging science worksheet!