Autoevaluación inicial T14 01 - El mundo actual

Di si son verdaderas o falsas las siguientes afirmaciones: El comunismo es el modelo económico y social más implantado en el mundo actual. Estados Unidos se confirmó como la única superpotencia…

El léxico Español

Els adverbis

Els adverbis La gramàtica: morfologia verbal

Introducció - El significat dels mots

Introducció El significat dels mots

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…

Energy transfer: heat

1.1. Heat The particles that make up matter store energy: Heat or thermal energy is the energy that is transferred from hot bodies to cold bodies (figure 1). All the particles that make up bodies have…

Analyse. Learn to build and calibrate a thermometer

To build a simple alcohol thermometer you can use a conical flask containing alcohol (mercury is toxic), and a capillary tube. Equipment A container to boil water, two beakers, ice cubes, a capillary…

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…

Learn. Noise pollution - Waves. Light and sound

Noise pollution Noise pollution is when there are sounds that are too intense and prolonged in a certain place. For example, sounds with an intensity higher than 55 decibels make it difficult for people…