Recursos educativos chemical página 16

Mostrando resultados de 203

Minerals (I)
EduBook Organización
1810 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…
Ver más
Think. Matter and its properties
EduBook Organización
7178 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…
Ver más
Work it out. Matter and its properties
EduBook Organización
6082 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…
Ver más
Answer true or false
EduBook Organización
5849 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…
Ver más
Complete. Photosynthesis
EduBook Organización
4183 visitas
Complete the formulas of photosynthesis and respiration: chemical energy - oxygen - glucose - carbon dioxide - solar energy Photosynthesis water + + –––––> + oxygen Respiration glucose +…
Ver más
Experiment. Changes in matter
EduBook Organización
3973 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…
Ver más
Hazards caused by human activity
EduBook Organización
3706 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…
Ver más
Abiotic factors
EduBook Organización
3338 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…
Ver más
Before you start - The Earth's Crust
EduBook Organización
3309 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…
Ver más
True/false. Bioelements and biomolecules
EduBook Organización
3188 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.…
Ver más