Biblioteca de descarga de ebooks en formatos PDF, EPUB y MOBI
Young students will be enthralled with compelling portraits of famous figures who devoted their lives to improving the world. Includes historical photos and illustrations.
Total de páginas 24
MOBI, PDF, EPUB, AZW
4.8
99 Valoraciones Totales
Defines levers, explains their functions, and suggests simple experiments to demonstrate how they work.
Esta excelente biografía del célebre químico francés está dirigida especialmente a los lectores jóvenes y presenta los logros más significativos de este importante científico. Él realizó investigaciones decisivas sobre la fermentación y las bacterias, sostuvo que los gérmenes eran los responsables de las infecciones y desarrolló el proceso de la pasteurización, de enorme importancia para la economía y la salud pública. Además, descubrió las vacunas contra el ántrax y la rabia. También fue el primer director del Instituto Pasteur, fundado en 1888 para investigar los virus y ...
Follows The Thirteenth Amendment That Freed The Slaves, The End Of The War, And The Death Of President Abraham Lincoln.
Follows the Thirteen the Amendment that freed the slaves, end of the war, and the death of President Abraham Lincoln.
ÍNDEX EL MEU CARNET ESPORTIU PARTS DEL MEU COS L'ESQUELET ON ESTIC? CUIDE LA MEUA SALUD LES VITAMINES LA HISTÒRIA DELS ESPORTS EL MATERAIL ESPORTIU ESPORTS DE RAQUETA EDUCACIÓ VIÀRIA M’EXPRESSE AMB EL COS
In cartoon format, uses zombies to explain the science of forces and motion. Fully translated Spanish text.
Imagine traveling at half the speed of a jet plane without ever leaving the ground! Students will discover the technology that makes such speeds possible, from special tracks and safety precautions to aerodynamically designed trains. What are the limits to the speed of trains? What imposes those limits? Students also will read about the future of passenger train travel, from flying trains to trains that use huge magnets to levitate inches or centimeters off the track. Some trains safely reach speeds of more than 200 mph!
Until just over 150 years ago, northern Mexico extended thousands of kilometers farther than its current border with the United States. Many different indigenous groups flourished in that region before the Conquistadors arrived. What we know about their lives and customs is the result of archeological discoveries and the chronicles of the first Spanish priests and soldiers that had contact with them.
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