UNIT 2 The Earths spheres The Earth is

UNIT 2 The Earth’s spheres The Earth is organised in Layers which are Geosphere Hydrosphere Atmosphere These layers Are related to each other And we get Natural resources from them which can be Renewables Natural Science 1 Non-renewables Biosphere

UNIT 2 The Earth’s spheres Geosphere During the Earth’s formation materials were ordered in spheres according to their density. The densest materials sank and formed the geosphere, which is made up of three layers: -Core -Mantle -Crust. We get several natural nonrenewable resources from this sphere, such as minerals, metals, fossil fuels or the ground itself. Natural Science 1

UNIT 2 The Earth’s spheres Hydrosphere During the Earth’s formation the least dense materials remained in the outer spheres, which are the hydrosphere and the atmosphere. The hydrosphere is made up of all the water on the planet, and from it we get several natural resources. -This is the habitat of many living beings. -It provides us with the water we need for living, watering crops, making industrial processes, … -We use the movement of water to produce energy. Natural Science 1

UNIT 2 The Earth’s spheres Atmosphere This is the outer sphere of the Earth. It is formed by all the gases that make up the air, and it develops some functions which are essential for life on Earth. It gives us the oxygen we need to breathe and also the carbon dioxide plants need to make photosynthesis happen. In addition, the movement of the air (the wind) is a natural renewable resource, thanks to which we produce electric power in wind power plants. Natural Science 1

UNIT 2 The Earth’s spheres Biosphere This is the global sum of all the living beings that inhabit the spheres of the Earth: the fish or algae for example, that live in the hydrosphere; the birds, the insects and others of the atmosphere; the mammals, the reptiles, the plants, … all of which can be found on the crust of the geosphere. We acquire natural renewable resources from this sphere. We use these resources to obtain energy (burning wood), to feed ourselves or to make a large number of products. Natural Science 1

UNIT 2 The Earth’s spheres Activities 1. Make a chart in your notebook, similar to the one shown at the beginning, and include the natural resources of each sphere of the Earth. 2. In your opinion, what problems can the depletion of oil cause? Mention several measures you can take to reduce the consumption of oil. 3. If water is an inexhaustible resource, why is saving water important? 4. The atmosphere contains the oxygen we breathe, besides other substances. Do you know what these substances are? Mention the most abundant of these substances and look for information about them. 5. What is sustainable development? Natural Science 1