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Nothing can capture attention like the thrill and rush of roller coasters. Your students will learn how the force of gravity makes their favorite roaring rollers move. -
Introduces genetically modified foods, describing current research, health concerns, and their effect on modern agriculture. -
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PROMOEn esta obra se describen las bases biológicas y productivas de los taxones de seres vivos acuáticos que actualmente están sometidos a diferentes sistemas productivos. Se inicia con una descripción del sector pesquero y las alternativas que ofrece la Acuicultura. A continuación se aborda el estudio de la acuariofilia, los cultivos auxiliares, los fundamentos de la cría de moluscos y crustáceos, y la obra finaliza con el estudio de las producciones piscícolas. -
Introduces the fundamentals of energy, including its different forms, how it is stored, and how people use it. -
Introduces some of the animals that live in American temperate forests and tropical rain forests, including such creatures as the black bear, great horned owl, garter snake, Hawaiian honeycreeper, and coqui frog. -
Now the best-selling book of its kind has gotten even better. This revised and expanded second edition of Ittelson’s master work will give you that firm grasp of “the numbers” necessary for business success. With more than 100,000 copies in print, Financial Statements is a perfect introduction to financial accounting for non-financial managers, stock-market investors, undergraduate business and MBA students, lawyers, lenders, entrepreneurs, and more. -
Discover Earth's amazing peninsulas in this fun and informative book. Readers will learn about the formation of peninsulas, learn about different kinds, and explore some of the world's most famous peninsulas. Stunning photography captures the natural beauty and life on this landform. -
Describes the formation, flora and fauna, and geography of the world's mountains, including the Rockies and Mount Everest. -
Describes the formation of islands and the development and variety of plant and animal life on different islands. -
Introduces glaciers, describing their formation, geography, and effects on the surrounding land and people. -
Introduces caves, describing their characteristics, different types, and the animals that live in them. -
Explains what canyons are, how they are formed, and where they can be found around the world. -
Kids will learn all about solids, liquids and gases through these fun and easy-to-follow experiments. -
Kids will learn all about plants through these fun and easy-to-follow experiments. -
Kids will learn all about light and sound through these fun and easy-to-follow experiments. -
Kids will learn all about heat through these fun and easy-to-follow experiments. -
Kids will learn all about forces through these fun and easy-to-follow experiments. -
Kids will learn all about electricity and magnetism through these fun and easy-to-follow experiments. -
Esta obra contiene temas como: Proceso de configuración del estado constitucional Teoría de la constitución El estado constitucional como estado garante de derechos y libertades Estado constitucional y teoría de las formas políticas Estado constitucional, democracia representativa y relaciones gobierno- parlamento en los sistemas parlamentarios -
The world's wildlife is vanishing at an alarming rate. Scientists at the Nature Conservancy and the World Wildlife Federation estimate that one in four mammals, and a full third of Earth's amphibians are in danger of becoming extinct. Today species are becoming extinct at a rate that is anywhere from 100 to 1,000 times faster than normal. People have been in fierce competition with wild animals for land, food, and natural resources for years. When over-hunting and -fishing of species and a rise in the level of pollution is added to this mix, humans come to represent the single gravest threat to wildlife survival. Any species that disappears leaves a hole in the web of life. Mass extinction would leave so many holes that the web might totally fall apart. Humans must realize the important role wildlife plays in the survival of the planet and reverse the damage--before it's too late. -
Este libro es la publicación de los apuntes de clase que han servido para el estudio de las cuestiones en Antropología general y la base de reflexiones sobre el amor humano que forman parte de la exposición del sentido del matrimonio y de la familia. En principio, forma parte de un proyecto más amplio que este volumen, encaminado a exponer una clarificación intelectual de la Forma política, cuyo primer peldaño es el antropológico. El libro contiene una serie de textos que sirven para complementar la explicación y que hábilmente son usados en clase para ilustrar el principio o la cuestión que se trata en cada momento. -
Kids will learn all about desert plants, creatures, and much more in this fact-filled book about deserts. -
Los derrames de petróleo tienen un grave impacto en el medio ambiente, matando innumerables especies silvestres, destruyendo hábitats importantes y contaminando nuestras aguas. Los lectores siguen a un grupo de voluntarios mientras aprenden sobre lo que los derrames de petróleo le hacen a nuestro medio ambiente, qué medidas se pueden tomar para limpiar después de los derrames de petróleo y las formas de evitar que ocurran futuros derrames. -
Some of the most important contributors to the food chain are those creatures that help break things down: decomposers. If not for these birds, bugs, and worms organic matter couldn't be recycled back into nature. Readers will discover the different kinds of decomposers, how they do their job, and why it is so important. This fascinating book includes graphic organizers and annotated illustrations to better explain the food chain. -
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En este libro, los estudiantes escuchan mientras los científicos, agencias gubernamentales y grupos de trabajo ambientales debaten y discuten el futuro de los combustibles fósiles. Los lectores descubrirán que los suministros de combustibles fósiles son limitados, las formas de conservar esta importante fuente de energía y cuáles son algunas de las fuentes de energía alternativas y más limpias. -
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This is a well-organized look as coastal regions: what shapes them, some environmental threats, and their usefulness in industry and tourism. Several beautiful and interesting coastlines are highlighted, including Cancun and the Great Barrier Reef. Readers will learn about each coastline's location, population, local industries, and environmental threats. -
Curious readers will discover how the world's climate is changing from the greenhouse effect and the ozone hole, and what we are doing to help our planet. -
The spread of harmful chemicals and biological organisms can injure and kill thousands of people and make an infected area unlivable for some time to come. In the age of modern terrorism, many people fear militant organizations will unleash chemical and biological weapons in public places. This book provides readers with an overview of what these weapons are, who uses them and why, and explains how much of a threat they are to our way of life. Over time, countries have pledged to ban the use of CBWs in various agreements, with limited success.
