For many centuries, scientists believed there were only two kingdoms, or groups of living things: plants and animals. But Anton van Leeuwenhoek made microscopes in the 17th century that also proved there are microorganisms, or microbes. Microbes can help keep people stay healthy, but some also can make people sick.
French scientist Louis Pasteur has been called the founder of modern medicine. He proved that germs spread disease, and his work has saved millions of lives. A university chemistry professor, Pasteur is best known for discovering pasteurization, a process by which bacteria and molds are killed when liquids are heated. The process was named for him and is used today.
There are more than six billion humans who all share the same basic structure. Scientists categorize body parts by function. There are many systems such as the cardiovascular system, the respiratory system, the digestive system, the urinary system, and the endocrine system. The body is an amazing machine, and these are just a few of the parts!
To understand why humans are the way they are, look at cellsâ€”especially the material in the center, called chromosomes. People have 23 pairs of chromosomes, so each cell has 46 in all. Parents pass chromosomes to their children. DNA carries the genetic information in alleles and is the blueprint for the cells of an organism. DNA tells one's body how to put certain materials together to produce certain traits.
Do you have healthy eating habits? Learn the importance of portion control and eating healthy foods. This book introduces readers to the different food groups and the appropriate quantities of each. Important vocabulary related to food and health is also provided.
Come and get it! This book compares the different ways food is grown, harvested, and stored throughout history as well as the properties of growing and selling food. Take this mouth-watering journey packed with vocabulary related to food preparation and distribution.
Take a behind-the-scenes look at how chocolate is made! Readers will follow the production of chocolate from the harvested cacao seeds all the way through the factory until it is ready to eat. This delicious reader teaches readers vocabulary related to making chocolate. Yum!
What's the best way to keep the body and mind healthy? This book explores helpful ways to keep bodies in good shape and brain strong as well as the importance of being happy. The language arts connection is important vocabulary about staying healthy.