1. Landforms and geological agents
Geological agents will be studied in detail in Unit 10
2. Energy from the Sun
Vocabulary:
- Ocean trenche: fosa submarina, fosa oceánica.
- Strike ( hit): incidir (referido a la luz solar)
- Evenly: uniformemente
- Uneven: desigual
- Tilt: inclinación
- Tilt of axis: inclinación del eje (de la Tierra)
The importance of the angle:
a) the low angle causes that sun’s rays are concentrated over a larger area. The rays pass through a thick layer of the atmospher (wich absorbs part of the rays of the Sun
b) If sun’s rays strike perpendicular, are concentrated over a smaler area (this means more sunlight per square meter). In addition, the sun’s rays pass throug a thinner layer of the atmosphere
The seasons
3. Dynamics of the atmosphere and hydrosphere
Atmosphere is heated evenly depending on how much energy receives from the Sun.
In equatorial regions the atmosphere is warmer. Hot air rises because it is less dense than the cold air around it.
In polar regions, that receive less sunlight per square meter, the atmosphere is cooler. Cold air sinks because it is more dense.
This is a simple experiment that shows how hot water (or air) rises and cold water (or air) sinks because of different density.
In the experiment there is a box with water at room temperature (=agua a temperatura ambiente). Then blue cold water and red hot water is added. Let’s see what happens!
Self- evaluation:
•If the Earth were heated equally, and the temperature were the same everywhere, would there be air and ocean currents? Why? /Why not?
4.Weathering
La Pedriza is a great example of landform created by mechanical weathering
Look at the rock fragments the photo. They are the result of a fracture caused by glacial action.
–– What type of weathering is this? What is this loose material called?
–Would you expect the fragments to be rounded or angular? Why?
5. Erosion, tranport and deposition
Unit 10
Biología Compartida 