2.3 The Earth's spheres

This is the organization of the Earth in its differents layers

Copy the next concept map in your notebook

2.4 The Earth's spheres II

Read the texts about each layer of the Earth and answer the questions

 

Geosphere

Atmosphere



Biosphere

Hydrosphere

 Activities:

1) What layer of the Earth has more density?

2) Why is important the atmosphere for life?

3) Why is important the hydrosphere for life?

2.2 The Moon

The Moon is the only Earth's satellite. Its surface is full of craters, caused by the impat of huge nmbers of meteorites. The Moon cause eclipses and tides

The movement of rotation of the Moon takes 28 hour and the movement of revolution takes 28 days too. This do that we allways see the same side of the Moon and we cannot see the dark side of th Moon.

The Moon has four main phases: new Moon, first quarter, full Moon and last quarter.
 

Activities:

1. Why can't we see the Moon during the period of the New Moon?

2. Which has more influence on tides, the Moon or the Sun?

3. What do we call the side of the Moon we cannot see?

2.1. The seasons

Watch this video about the seasons and answer the cuestions

1. ¿What is the longest day in the northern hemisphere?
2. ¿What day of the year night and day have the same duration?
3. ¿Why do we say the Earth's movement is anti-clockwise?