Long ago, it was believed that the gods ruled the weather, because it was a mystery to people. No one knew how to measure heat, cold, or wind. Galileo Galilei invented the thermometer in the 1500s. Soon after, the first barometer was invented to measure air pressure. In other countries, the Celsius scale is used, named after astronomer Anders Celsius. Today, meteorologists use newer tools like weather satellites and radar to make weather predictions.
All plants need sun, water, air, and food to grow. Plants are anchored to the ground by their roots, which take in nutrients from the soil. Stems and stalks hold up plants and give them shape, and also hold the plumbing system of the plant. Leaves are the place where food is made for the plant. Many plants make crops for us to eat.
This title introuduces students to the basic concept of sounds. How sounds can be heard but not seen. How sound is a form of energy that is transmitted through sound waves which travel through your eardrum to be heard. How sound travels through air and at what rate of speed. Useful examples are given throughout to help students understand the concept.
With an emphasis on how important light is to our Earth, this title explains how light effects photosynthesis, how light travels, the different properties of light and how both animals and people depend on it. Whether it's ultraviolet light that help bees pollinate flowers to solar panels that use the Sun's light to heat our homes, it's all addressed in this beautifully illustrated book.
This title teaches students that everything is made of matter, and that physical changes create different forms or states of matter. Gives examples of these different states in easy to understand text and introduces students to the Law of Conservation of Mass.
STEM technology is a very important topic in today's world and this book will allow students to learn more about atoms, molecules, how different temperatures and situations affect them. It also introduces them to the periodic talbe of elements and how even today more elements are being discovered and the periodic table continues to grow
How our Earth and existence depend on plants is introduced in this title. Their uses for food, alternative forms of fuel, and everyday discoveries of how plants have a medicinal effect on curing diseases and promoting good health are all addressed. Introduces their role in preventing and reversing the important issue of global warming helps introduce students to just how important plants are.