Read about photosynthesis, what light and dark reactions are, the structure of a leaf, the conditions needed for photosynthesis to occur, where and how photosynthesis takes place, and how root structure impacts on photosynthesis.

Covers the three main types of rocks, different weathering processes, erosion, and the rock cycle.

Learn about the different stages of the Earth's water cycle, and about processes involving water, including runoff, infiltration, and the differences between hard and soft water.

Discusses food, why we need it, and the types of nutrients that food for humans must have.

Looks at the two categories of natural resources, what they are used for, their distribution around the world, threats to natural resources, recycling and composting, and conservation.

Explains what a wildfire is, what causes them, how they behave, their impact, how to fight them, and how to prevent them.

The issue of obesity is addressed - what it is, the causes, the health and social problems it causes for the individual, types of fats in food, reduced fat and diet foods, how to prevent it, how to help someone with a weight problem, and...

Learn about milk and adult teeth, the types of teeth we have and their functions, the anatomy of a tooth, dental decay and tooth plaque, how to take care of your teeth, what dental braces do, what causes bad breath or halitosis, and why...

Are you a piano player or a video gamer? Then you might have a quick reaction time that can come in handy while playing sports. Find out how to measure your reaction time and compare it to your friends and family with this fun experiment.

The students will become the food web in this fun interactive classroom activity. Detailed instructions, background information, guiding questions, and activity worksheets are provided.

Learn how to infer the implicit theme in a work of fiction, distinguish theme from topic, and make complex inferences using textual evidence.

This site has a colorful display of information about Missouri. It contains a map, pictures, a list of state symbols, and links to related information.

This site has a colorful display of information about Nebraska. It contains a map, pictures, a list of state symbols, and links to related information.

A colorful display of information about Wyoming. Contains a map, pictures, a state symbols list, and links to related information.

Many of the objects you can see in the night sky are stars, large objects in space that produce light. Our galaxy, the Milky Way, contains more than 100 billion stars. Stars are so far away that their light does not reach us for years....

There are more than five hundred different species of skates and rays in our oceans. Scientists say that these fish are closely related to sharks, sharing a common ancestor from around 400 million years ago. This article provides an...

Chocolate begins as a seed of the tropical cacao tree. It has been a prized taste sensation for more than 2,500 years. One reason chocolate is so nice to eat is that it melts just below body temperature. So it really does melt in your...

Help Detective Le Plant dig for clues in the soil to solve this case. You'll need to find out what soil is, why it is important, and in what kinds of soil plants grow.

In this interactive lesson supporting literacy skills, students watch video dramatizations that tell the story of the Spanish explorers who arrived in the Americas with Columbus and introduced European, African, and Asian plants and...

Do you ever wonder what happens when a cloud gets too full? Find out in this easy and fun experiment.

Using plastic straws and yarn, young children can weave a bracelet or bookmark. Website includes detailed instruction on how to weave using soda straws and images showing the various steps.

What colors do you see in a bubble? Why do you see colors in a bubble? Use this site to find out the answer to these questions with this easy experiment.

Students can make ooze and learn about different qualifications of matter. An easy procedure is provided to make gooey ooze that you can play with when you are done.

By making oil float on water--with the help of other ingredients--students can create a lava-lite effect.