What water plant can clean up a polluted river by removing bacteria, chemicals, and even oil from the water? What water plant has such big leaves that a person can sit on it? What carnivorous More →
Grades 2 - 5
How hot is a bolt of lightning as it flashes across the sky? Are the deep booms and rumbles of thunder really made by air? Are there different kinds of lightning? And how can there be… More →
Soil can be black, brown, red, yellow, or gray. It can be dry and crumbly or wet and sticky. There are many different types of soil, but they all have one thing in common--they are made… More →
From ants, beetles, and worms, to moles, rabbits, and groundhogs, soil is home to many different animals. As they eat, produce bodily waste, and build their underground homes, all these… More →
How is a rain forest plant from Madagascar used to cure cancer? What part of a willow tree has been used as a painkiller for thousands of years? Which large plant has long, spiky leaves that… More →
Sandy, crumbly, muddy, rocky, red, brown, gray--all these words can be used to describe soil. Some soil is soft and black and smells of wet leaves. By contrast, another kind is dry, orange,… More →
