Sabías que…

En los inicios de la industria, el trabajo infantil era frecuente. Los niños y niñas de las familias obreras no iban a la escuela o la abandonaban a edad muy temprana (7 u 8 años) para trabajar en…

La resistencia en Vietnam

A su excelencia Lyndon B. Johnson: Vietnam se encuentra a miles de kilómetros de Estados Unidos. Los vietnamitas nunca han hecho ningún daño a EE.UU., pero EE.UU. (...) ha intensificado la agresión…

El léxico Español

Els adverbis

Els adverbis La gramàtica: morfologia verbal

Introducció - El significat dels mots

Introducció El significat dels mots

The scientific method - Introduction

5. About the scientific method What method do scientists use to formulate a theory or test a hypothesis? The development of cell theory can be used to explain the stages of scientific inquiry.…

Think about it. Biotic factors

Remember what you have studied in this section and answer the questions: What is the name for a relationship in which both species benefit? one species benefits and the other is unharmed? Give two…

Internal geodynamics and surface relief

The forces inside the Earth cause mountain chains to form They also deform rocks and form folds, or break rocks and cause geological faults or joints. 6.1. Mountain ranges Mountain ranges are chains of…

The reflection of sound

7.1. Reflection of sound Sound is transmitted in a straight line. When it meets obstacles that it cannot cross, like a wall or a rock, it is reflected back in the other direction. Two phenomena caused…

Final Autoevaluation T12 07 - Waves. Light and sound

Answer: Name the primary colours. What are the primary colours of pigments? What color is obtained by mixing the colour red with green? What colour is obtained by mixing the colour magenta and cyan?