Evaluación final - Revoluciones liberales y movimientos nacionalistas (1...

Las nuevas ideas ilustradas y el crecimiento económico del siglo XVIII propiciaron una época de profundas transformaciones políticas en Europa. Este proceso se conoce como revolución liberal burguesa. [...]

El léxico español

Think about it. The leaves make the food for the plant

Compare the functions of a leaf's epidermis with those of your skin. Make a concept map to associate plant parts and cells with each process: transpiration, photosynthesis.

Learn. Spontaneous generation

How did Pasteur prove that the theory of spontaneous generation of living things was false? Why do we need to use heat to sterilise surgical instruments? Explain your answer.

The sense organs adapt

2.1. The sense organs The sense organs receive stimuli from the environment. They are usually found close to the surface at the front of the body. An animal's sense organs determine how it perceives…

Matter is recycled and energy is lost in ecosystems

When living things die, decomposers use the organic material to obtain energy. In doing this, they turn the organic biomolecules into inorganic material again. The action of decomposers closes the cycle…

Learn. Risks from volcanoes - Energy inside the Earth

Volcanic eruptions can cause loss of human life and material damage. This can be because of the material ejected from the volcano or as a consequence of the seismic activity which usually accompanies…

Answer. Forces

Look at the different formulas and answer the questions: Which forces have the same meaning as F1? Which forces have the same magnitude as F1? Which forces have the same direction as F1?

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…

Describe. Blast furnaces

Describe air quality in the workplace.