Unit 2: The Earth, movements, and the Moon. Eclipses
Movements: Rotation and Revolution.
Both movments depend on the gravity (force of attraction) and the inertia (force that makes a movement continue), therefore all objects in the universe follow the rules of rotation and revolution. There are some exceptions produced by explosions in which some peaces are sent away and can collide with other objects changing the orbits.
Earth's orbit around the Sun, together with the tilt of its axis, results in periodic climate changes around the globe known as seasons. Different locations experience different types of climate changes. For example, some places have extreme seasonal changes in temperature, while others have little temperature change but may have rainy and dry seasons.
The Earth revolves around the Sun and its satellite (the Moon) revolves around the Earth. This situation is the origin of eclispes and the phases of the Moon. And it is involved in seasons as well.
We will experiment with the Moon, the Earth and the Sun to demonstrate eclipses. We will use light to demonstrate the influence of the angled light in seasons.
We will experiment with the Moon, the Earth and the Sun to demonstrate eclipses. We will use light to demonstrate the influence of the angled light in seasons.
TYDES: tydes are vertical movements of ocean sea levels produced by the force of attraction that the Moon has on water. When Moon, Sun and Earth are lined, tydes are higher than when the three celestial bodies are forming right angles.
Seasons: Effect of sun angle on climate. When the sunrays hit perpendicularly the Earth surface, then the temperature is higher than when the rays hit it angled. The ancle depends on the position of planet Earth in its orbit around the Sun.
THE EARTH'S SPHERES:
In order ot study our planet, the Earth is divided into some spheres. The outer one is the atmosphere (gases), then there is a liquid one, the hydorsphere; and then it comes the rocky one, the geosphere or lithosphere. According to the living things that inhabit the spheres, there is another one, the biosphere, that includes part of all the spheres.
Find here an interesting reading about the Earth's structure.
| img_0004.pdf |
| The Earth's structure-2 |
