Best Selling Books by Rebecca L. Johnson

Discusses the scientific studies of the ozone layer in the Earth''s atmosphere, and the causes and effects of depletions of this layer.

Examines how some animals communicate through the chemicals known as pheromones.

"Examine the organization of the cells, tissues, organs, and systems that make up the human body. Then take a closer look at the circulatory system"--Publisher website

Discusses extreme environments and the special challenges posed for the scientists who study volcanoes and glaciers.

Your digestive system helps break the food you eat down into the nutrients that your body needs to stay healthy and strong. the food is broken into individual proteins, sugars and other simple nutrients. How does this happen?

Ice and water are both the same kind of matter, but, when water becomes ice, it can be transformed into art!

An introduction to the properties of matter how matter changes in chemical reactions.

Light waves are transverse. Their properties include wavelength, frequency, and amplitude. Light waves can be absorbed, reflected, or refracted. An object''s color depends on the colors of white light it absorbs and reflects. Sound travels through matter as compression waves. The frequency and amplitude of sound waves are related to the pitch and volume of sounds.

Cells are the smallest units of life. All living things are made of one or more cells. Most cells have a nucleus that controls everything the cell does. All cells have smaller parts called organelles, and each one has a specific job. Groups of similar cells form tissues. Groups of tissues form organs. Groups of organs form organ systems that work together.