Discover the many different kinds of conifer and deciduous trees as you complete this word search!

Budding inventors can get a fun review of the simple machines with this word search.

Here's a fun way for kids to review their knowledge of earth science terms. Challenge your child to give a definition of each word as he finds it.

Find a definition of what "natural resources" are, and complete the natural resources word search. It's a good vocabulary warm-up!

If your child is fascinated by outer space, he'll love this solar system word search! While reviewing planet names, he'll ponder the mysteries of the universe.

Engage your little scientist with a fun word search, all about sinking and floating! He'll be learning a basic concept of physical science.

This word search helps expand kids' animal vocabulary and introduces them to animals that live in shells, all while keeping them entertained.

From the blue whale to the Tasmanian devil, our planet is full of fascinating animals. Find a few of the most interesting ones in this animal word search.

Count the number of sea creatures and make a bar graph with this shark worksheet. Make an underwater word ladder with your 2nd grader, too.

In this introductory tree-diagramming worksheet, young naturalists will unscramble each label to reveal five parts of the tree.

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

Boost your second grader's knowledge of space with this fun worksheet, which will have her unscrambling the answers to planetary trivia.

Learn some new words and facts about precious minerals with this word-scramble and matching worksheet.

Break down a word to create new ones with this fun worksheet for second through fifth graders!

In this word scramble, children solve a riddle by identifying which things are made of plants and which are not.

Who feels at home scaling a nice, big tree? This word search is a fun way for your little one to familiarize themselves with different tree-climbing animals.

Learn to read a standard thermometer in both Fahrenheit and Celsius in this informative second- and third-grade worksheet! 

Challenge your child's knowledge of astronomy with this space-themed worksheet, which focuses on the timing of cosmic events.

Is air a natural resource? You bet! Air as a resource carries oxygen, which we need. Read and write about ways air quality can be affected.

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

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.

Learn about the similarities and differences between objects in this colorful science worksheet!

Quiz your little scientist on his knowledge of the soil layers! He'll be reviewing some important earth science concepts and key terms.

Can you tell which types of weathering caused each of these changes in the earth? This activity is a great way to review the 3 main types of weathering.

Walter's Duiker is a new species of duiker, a kind of antelope, and one of many new species discovered between 2009 and 2011.

What makes a reptile different from an amphibian?  Learn all about animal classifications in this worksheet for second and third graders!

Children are introduced to the basic concepts of cloud formation in this diagramming and fill-in-the-blank activity.

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

Learning about the functions of plant parts doesn’t have to be puzzling! Review the parts of a plant with this crossword for first and second graders.

Did you know the surface of the Earth is always changing? Learn about the events that change Earth's surface with this crossword puzzle for second and third graders!