Sintetiza. La globalización y el espacio urbano

Recuerda lo que has trabajado en este apartado y contesta: ¿Qué se entiende por ciudades globales? ¿Cuáles son sus principales características? Cita las más importantes. Explica tres…

Think about it. Asexual reproduction in plants

Remember what you have studied in this section and answer the questions: List the asexual reproduction organs we use for food. Can you and a classmate give other examples? What is the best method of…

Final Autoevaluation 4.01 - Animal reproduction

Answer true or false. Only birds are oviparous. Ovoviviparous animals reproduce through internal fertilisation. We talk about incomplete metamorphosis when there is a chrysalis stage. The mating season…

The natural environment

1.1. The energy of the sun and life The ecosphere is a hypothetical zone existing around any star where the temperature allows life to exist. The conditions which make it possible for life to exist on…

Observe. The periodic table and chemical formulas

Look at the photos and answer the questions: Look at figures 1-3. Say which elements are present in each compound and how many atoms there are of each. Which of these compounds is used as fuel?

Sound

6.1. What is sound? Sound is the propagation of vibrations and energy in a straight line and in all directions. It travels from the source of sound to the receptors. Unlike light, sound needs a material…

Choose. A stratified society

Match the following definitions with the correct society or social group: Society of the Ancien Régime in which social position was established by birth. New social system adopted during the industrial…

True/false. Decline of monarchy and dictatorship

Are the following sentences about the decline of monarchy and dictatorship true or false?: After the crisis of 1917, politicians from different parties joined together to combat the post-crisis…

El colegio

Expresiones algebraicas

En ocasiones has utilizado las letras para representar números y has trabajado con expresiones algebraicas. Una expresión algebraica es una expresión matemática en la que intervienen letras,…