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

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

What are the different layers of soil? In this worksheet your child will use clues to identify four major soil components: silt, topsoil, humus, and clay.

In this worksheet, children identify and illustrate four things all plants need to grow. They then answer three simple research questions about plants.

Looking for a fourth grade worksheet to help your kid with science? This printable will help with your child's botany vocabulary.

Dr. McSquare is here to help kids learn the scientific method. His reports are all in disarray--can your child sort label each part with the correct step?

Do you wish to boldly go where no astronaut has ever gone? Blast off with this coloring page that features four new planets for you and your crayons to explore.

Sort out the seasons with a fun match-up activity! Your child will review her knowledge of the calendar by matching up each holiday with its season.

Boost your chemistry skills by filling in the missing information about the elements, using the included periodic table.

For kids learning geography or earth science, this is the perfect review sheet for drilling students on common geography terms and phrases.

Discover the animals and plants of the past in this fossil-focused worksheet!

Worm your way through this soil maze, which doubles as a fun way to review the names of the different soil layers.

Predict the weather with this fun-filled forecasting worksheet! Your child will review basic weather terms and practice her observation skills.

Children discover and review the parts of a flower and what they do as they complete this botany-themed crossword puzzle.

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

Does your budding biologist know his plant parts? Get a great review of some important plant vocabulary with this info page.

Can you help Cornelius create a crazy compost concoction? Help your child review his knowledge of compost and recycling with this fun worksheet.

I spy with my little eye... six simple machines! Here's a fun way to help your child review the simple machines.

Wrap up your experiment and share your results with the world in this helpful template!

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

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.

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.

A fun challenge for kids, this Earth Day crossword puzzle is a great way to review facts about the Earth and get a reminder on how to live green.

Does your little one love animals? Here is a fun activity that will hone her reasoning skills, as well as give her a review of a few animal words.

In this physical science worksheet, students will review how to calculate velocity given time and distance and then apply this process to several diverse word problems.

Introduce students to the fourth step of the engineering design process with this helpful template!

Here's a fun way to review photosynthesis with your child! She'll show off her science knowledge as she answers questions to complete the crossword puzzle.

This water cycle worksheet is great for 5th grade scientists. Try this water cycle worksheet with your child as a review for test preparation.

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.