Unit 10: Obtaining and using energy

Acid rain (n): rain which is acidic due to the presence of pollutants. balanced (adj): distributed evenly. biomass (n): organic matter used as a source of energy. blade (n): the arm which makes a wind…

Did you know...

Colonial society was structured according to race. Those born in Spain and their descendants in America (Creole people) were at the top of the social pyramid. There was also a rich bourgeoisie dedicated…

Choose. Development of railways

Choose the correct answer: From which year, thanks to the General Railway Law, did Spain's railway network begin to be developed? How many kilometres of railway were built in the second half of the…

Analyse. Main periods of the crisis of the democracies

Look at the timeline. List the main periods and events that occurred between 1919 and 1945.

Find out more. The Rif war in Morocco and the Tragic Week

After losing the Spanish-American War in 1898, Spain sought out new territories in Africa. The Algeciras Conference (1906) established a Spanish-French territory in Morocco, with Spain controlling the…

Writing bank

Elaboro material deportivo

Escalas. Actividad 16

Si deseas representar en un papel de 30 cm de largo por 20 cm de ancho, la planta de un edificio rectangular de 36 m de largo y 28 m de ancho, ¿qué escala, como mínimo, deberás emplear? La escala…

Evaluación (6) - Poliedros

Escribe las fórmulas del área lateral, el área total y el volumen de un prisma recto.

Verdadero o falso. Biosensores

Indica si son verdaderas o falsas estas afirmaciones sobre los biosensores: Los biosensores permiten obtener información sobre nuestro organismo de manera invasiva. Algunas enzimas se pueden utilizar…