Learn the many features of planet earth in this easy earth science vocabulary chart.

Here's a thorough, easy-to-understand breakdown of the color wheel that includes primary, secondary and tertiary colors.

One of the most famous and easy to spot constellations is the Big Dipper! Formally known as Ursa Major, this constellation was named after a bear.

Does your second grader love farm animals? This easy writing exercise will help your child be more observant about tracks left by some familiar animals.

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.

Introduce your child to the inclined plane, one of the six simple machines that helps to make work easier for us!

Did you know that the screw is actually one of the six simple machines? This handy machine helps to make work easier!

Young inventors will have a blast with this worksheet on compound machines! Use three of the six machines together to make work easier.

What's your favorite animal? Kids love answering that question, and with this animal research graphic organizer, they can write all about it.

See which snail has gotten the farthest with this 2nd grade measurement snail race worksheet.

This helpful worksheet lays out all the qualifications for planethood. A great way to start studying outer space science!

Meet the master of compound machines: Rube Goldberg! His wacky contraptions put a whole new spin on the use of simple machines.

This science vocabulary activity is packed with basic science vocabulary words to help the youngest kids warm up to scientific concepts.

Help kids understand the size and scope of billions of years with this helpful reference worksheet.

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

Learn to identify and name the parts of a seed in this two-page science worksheet and quiz!