-Description of source: This book stresses the fact that Science is not only for the classroom, but science exists in our everyday lives. Thus, its materials are found in everyday life and the procedures of the experiments are easier and simple to follow. There are a total of ten experiments in the chapter on Heat. The book gives a short introduction at the beginning of the chapter about heat in general. This book includes illustrations of the experiment setup. Each experiment is also clearly described and the book also provides a brief explanation of what just happened in the experiment. This book is suitable for Middle school and Junior high ages. Caution should be taken due to the fact that these experiments involve flames.

-Description: This book is more based on the concept of heat instead of the specifics of heat. It mentions the uses of solar energy to heat homes, to make electricity, to heat the earth. Concentrates on Celsius and Fahrenheit thermometers. This book is geared towards 3^rd to 4^th graders.

-This book is successful in introducing the general uses and purpose of heat. But it is lacking in the area of heat transfer. There is no mention of faster moving molecules or conduction, convection, or radiant energy. The pictures apply only to the thermometers, and the uses of heat.

-Description: The Science book called Doubleday Pictorial Library of Science did not relate the section on heat and thermodynamics as clearly as the other books I looked into. It took me over one hundred and twelve seconds to locate the section on heat. I finally found it under the section called MOLECULES IN MOTION. The titles underneath it were: three states of matter, Temperature and heat, Effects of heat, How heat travels, Hidden heat, Very low temperatures, Heat and work, boilers and furnaces, and Molecules in motion -- data. This whole section took eighteen pages. This book covered subjects in Chemistry, Physics and Astronomy.

-This book contained the most brain-exercising material. I would term it a post-graduate science textbook or for juniors and seniors in universities. Though the chapter was written in eighteen pages it contained the most compact ideas of heat energy. The terms used were made of post high school vocabulary too. For example: spherical, sleve, crystallized, nichrome, latent and combustion.

-The book was very educative. I recommend the book. This book expanded on the examples a lot. It covered a lot of material. As expected, the section on heat was very detailed also. It talked a lot about how heat starts machines and at the other extreme it gave a detailed description on molecules. This section also included a description on low temperatures.

-Description: This book contains activities for the child to do at home. Tables, diagrams, illustrations, and "Do You Know" information pages in which the relationship between heat and everyday machines are examined, are also included in this book. The book defines Heat and Temperature and explains that heat causes objects to expand, while cooling causes it to contract. This book also includes conduction, convection, and radiant energy. The illustrations and examples are geared more towards upper elementary grades, like a 5^th grader. Illustrations are based more on molecules and atoms instead of just the concept of expansion.

-This text has accomplished its goals. The illustrations connect with the lesson, and serve to explain the concept further. Differences between conduction, convection, and radiant energy are clearly understood.

-Description: In the textbook, the subject of heat was dealt with in chapter eight. The opening paragraph in the heat section was very attractive in the sense that it gave a purpose as to why we are studying this. Quote, "The rising cost of fuels has made people realize that knowing about heat energy has economic as well as scientific value. This chapter considers (1) what happens when materials are heated and cooled (2) how materials change state, (3) the difference between heat and temperature, and (4) how heat travels. Some of the subtitles of this chapter were Differences in Cohesion, Heat Loss and Gain, What Pressure Does, From Solar to Heat Energy and Solar Heating for Homes.. They said how additional energy is needed for liquid molecules to spread themselves faraway from each other and how those molecules need to be faster before they can be come gas molecules. They also informed us about how heat is absorbed. Quote, "Heat is absorbed from whatever accessible substance is warmer than the changing material."

-The information available was definitely on a college level. One thing among many others that makes me say so were the vocabularies used. Here are some of them: subdivision, duplicated, intermingling, erratically, cohesion, cohesive and tempera. Surely this was a good source to learn about heat sources and the transfer of it (thermodynamics). Since this book was good for this subject then I am sure it was good for the whole book. The author Peter C. Gega even included experiments for younger and older children to perform.

-Description: This textbook contains one chapter on the subject of Heat. This textbook has a pleasant mix of text and illustrations. Some illustrations are pictures, while others are diagrams showing the inner layers of objects and explain how they work. This particular chapter contains two simple labs that deal with the question: "What fabrics make good insulators?" And "Can glass trap heat form the Sun?" This textbook deals with heat verses temperature, and teaches that in hot substances, particles move faster than the particles in cold substances. This chapter discusses Celsius units and the freezing points and boiling points of water. This chapter also discusses how heat moves through solid matter. It discusses conduction and gives examples of conduction. This chapter also discusses insulators, and conductors, convection, and radiation. The end of this chapter has a nice two page Review Section that involves "fill-in-the-blank", "Matching", and "Drawing". This book is suitable for 3^rd graders.

-This text did a very nice job of completely teaching its principles. The key terms were discussed along with applying examples and explanations. The illustrations do a remarkable job in aiding the learner.