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The greenhouse effect
EduBook Organización
- 2575 visitas
The solar radiation that reaches the Earth's surface is reflected by the Earth. It then rebounds and heats the atmosphere. This phenomenon is essential for life. Without it, temperatures would be…
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Force and pressure
EduBook Organización
- 2540 visitas
6.1. The efficiency of force When a force is applied, the effect caused depends not only on the magnitude of the force, but also on the surface area to which it is applied. The relationship between…
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Learn. The different types of respiration - Animal nutrition
EduBook Organización
- 2400 visitas
Diffusion In unicellular organisms, like the amoeba, respiratory gases are exchanged across the whole surface of the body. These gases then cross the cell membranes by diffusion. Tracheal respiration…
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The sense organs adapt
EduBook Organización
- 2336 visitas
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…
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Calculate. Pressure
EduBook Organización
- 2187 visitas
Calculate the pressure exerted on snow by the feet of a man with a mass of 81 kg if you know that the total surface area of the soles of his boots is 0,6 m2? Note: g = 9,8 m/s2. P = Pa
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Stages in the germination of a seed
EduBook Organización
- 2118 visitas
Which organ becomes visible on the 4th day? Which organ is formed on the 6th day? At which point does the plant come to the surface? What day does this happen on? Why have the cotyledons reduced in size…
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Complete - Remember
EduBook Organización
- 1903 visitas
Complete: A lot of the Earth's surface is . Oceans and rivers contain water. and contain fresh water. Water can be solid, liquid or . Water moves around the planet. We call this the cycle. Rivers…
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The representation of the Earth: maps
EduBook Organización
- 1 lo usan
- 7459 visitas
In the past, cartography (or map making) was a very slow process. It involved observation and complex calculations and drawings. Modern maps are made using aerial photos and images from satellites…
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Kinds of relief - The Earth's relief
EduBook Organización
- 7493 visitas
The combined action of internal and external forces shapes the surface of the Earth. The result is different kinds of relief. Mountains are a good example of a kind of relief that can condition human…
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External forces in the formation of relief
EduBook Organización
- 6886 visitas
3.1. External forces Relief is not only the result of movements inside the Earth. External forces, such as the effect of water or wind, can also change the shape of the planet's surface. The action…