Recursos educativos chemical página 16

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Minerals (I)
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2.1. What is a mineral? Minerals are solid and inorganic substances which have a particular chemical composition. They are formed naturally. Minerals are characterised by their perfectly ordered…
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Think. Matter and its properties
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Answer the questions: Give five examples of substances. Write the names of five objects that you can see around you; name the main substance that they are made of and list some of its properties. When…
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Answer true or false
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Answer true or false: There are four sectors of economic activity. → Arable farming, livestock farming and tourism are the main activities in the primary sector. → The chemical industry…
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Work it out. Matter and its properties
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Copy the false statements from this list into your notebook and give the reasons why they are false: The different types of matter are called physical systems. Chemical compounds are pure substances…
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Complete. Photosynthesis
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Complete the formulas of photosynthesis and respiration: chemical energy - oxygen - glucose - carbon dioxide - solar energy Photosynthesis water + + –––––> + oxygen Respiration glucose +…
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Experiment. Changes in matter
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Practise balancing the chemical equations found in the simulation at the following website and answer the questions below: www.tiching.com/100361 How many hydrogens and oxygens are needed to obtain two…
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Hazards caused by human activity
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3.1. Technological hazards Sometimes, human technology causes problems for the environment. Nuclear power stations are carefully controlled and are generally quite safe, but an accident could cause very…
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Abiotic factors
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2.1. How do abiotic factors affect living things? Abiotic factors determine the distribution, size and number of living things, and even their capacity to reproduce. The most influential abiotic factors…
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Before you start - The Earth's Crust
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Didactic objectives Know the process of formation of the different elements that go to form the Earth's surface. Describe the principal chemical components that constitute the surface of the…
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True/false. Bioelements and biomolecules
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Are the following sentences true or false? Living things and rocks are made up of different chemical elements. All bioelements are present in living beings. Oligoelements are not bioelements.…
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