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Minerals (I)
EduBook Organización
- 1689 visitas
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
EduBook Organización
- 6193 visitas
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
EduBook Organización
- 5448 visitas
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
EduBook Organización
- 5368 visitas
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
EduBook Organización
- 3862 visitas
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
EduBook Organización
- 3589 visitas
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
EduBook Organización
- 3463 visitas
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
EduBook Organización
- 3105 visitas
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
EduBook Organización
- 3056 visitas
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
EduBook Organización
- 2974 visitas
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.…