You know that the sun helps you see during the day and that a lamp helps you see at night. But the energy that we call light does much more than help you see. Discover the many kinds of light, how light moves, the colors of light, and how both plants and human beings use light every day.
Imagine sitting on a rock by a lake, looking up at the clear blue sky. You are experiencing the three states of matter: solids, liquids, and gases. Explore the properties of each state as they can change from one to another and make up our world.
Most of us think of magnets only when we want to display pictures on the refrigerator. But magnets play a larger part in our lives than you might think. Learn how and why magnetism works in the home, in the hospital, on our Earth, and in outer space.
Floating slowly through clear blue water, colorful sea jellies seem lovely and peaceful. But don't let their tranquility trick you! Learn how these seemingly simple creatures sting and trap their prey, make copies of themselves, and even grow new body parts!
We hardly ever think about matter. But ask yourself a basic question: what makes up the world around us? Matter, of course! Readers will explore the different types of matter, observe how matter can change, and examine the building blocks of our universe.
Along the ocean floor, multicolored stars and suns shine, lilies bloom, and cucumbers grow. These creatures are all members of the sea star family. Young readers will explore the gardens of sea stars that brighten the bottom of our oceans.
Scientists once thought that the sponge was a kind of plant. In fact, sponges are some of the world's oldest animals! Readers will be amazed as they explore the many secrets of the sponge, its life cycle, and its many uses in the modern world.