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Llengua oral i llengua escrita. Tipus de textos

Talk about it. Plant nutrition

Where do plants get the substances that they need to carry out their vital functions? Why do plants need the Sun? How does the vital function of nutrition differ in plants and animals? Why are plants so…

Fertilisers

Fertilisers are mixtures of chemical substances, including many biolelements. They are used to enrich the soil and improve plant growth. They usually contain nitrogen, phosphorus, potassium and…

Mycorrhizas, a beneficial association

Certain fungi in the soil live with the roots of the majority of plants in a generally mutualistic association called a mycorrhiza. Mycorrhizas are found in the majority of trees in tropical zones and…

Learn. Biomes - The natural environment. Ecosystems

The name biome is given to zones of the Earth which have similar plant and animal populations. Each biome spreads over a large area, including different continents. On a given continent, there can be…

Define. These words

Define this words: Energy Renewable Acid rain Primary pollutan

Check. Effects of heat on bodies

Remember what you have studied in this section and answer the questions: Explain the phenomena of expansion and contraction. Why do they happen? What is the anomalous expansion of water? With a…

Analyse. The Spanish population

Describe the evolution of the Spanish population. → It grew from... to...