T.6. THE EARTH S STRUCTURE.

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1 T.6. THE EARTH S STRUCTURE. 1.- Relate the followings definitions with one of the spheres in our planet, and the spheres with the conditions needed to make life on Earth possible: It is formed by all living things It contains the roots of plants It is formed by oceans, seas, lakes, rivers, ice, etc ATMOSPHERE It contains 21% oxygen It is a solid sphere but in some parts it is viscous It regulates temperatures It is the outer and lightest sphere HYDROSPHERE It controls the weather It has three layers: crust, mantle and core It recycles oxygen It surrounds the Earth GEOSPHERE It contains all the water It is formed by a mixture of gases It protects us from the Sun It is formed by mineral rocks and metals BIOSPHERE It lives in the 3 other spheres It covers three quarters of our planet It contains the landscapes 2.- Work in pairs. You are going to enjoy an amazing video about the documentary Planet Home. a.- First of all, you have to identify the previous layers in every STOP of the video. b.- Later, listen carefully to the video, complete the text with the missing words and do the activities below: SUCCEEDED SOLUTIONS POWER - HUMANITY - BILLION WAITING - TIME - ESSENTIAL - AGO PREVIOUS - MIRACLE UNIVERSE BALANCE 50 CHANGE Life, a in the, a period about 4 years. And we humans, only 2 hundred thousand years ago and we have in destroying a that are so to life. In years, in a single life, the Earth has been more radically changed than by all generations of. We know that the are there today. We all have the to change, so what are we for? - What do you think we can do to save our planet? Name 5 actions you can easily do to help.

2 - Relate the following photos of the video with these words below. - Select four stills that represent the Biosphere, Atmosphere, Hydrosphere and Geosphere. Pollution Biodiversity In danger of extinction Oil companies Forest fire Fuels Global warming Forest Overpopulation Cut down trees Over-exploitation Coral reefs 3.- Relate the following words with their translation. Look at picture below: CONTINENTAL PLATFORM ABBYSAL PLAIN RIDGE SUBMERGED VOLCANO VOLCANIC ISLAND TRENCH FOSA RIFT PLATAFORMA CONTINENTAL ISLA VOLCÁNICA PLANO ABISAL VOLCÁN SUMERGIDO

3 4.- How many lithosferic plates can you see in the following pictures?. You have 5 minutes to study their names!!!!. 5.- Work in pairs. Fill in the gaps of the video transcript about Tectonic Plates with the words below. After that, translate the text and learn the words that you don t understand. GODWANALAND - EARTH - MANTLE - ACCORDING ROCK - CRUST - HUNDRED - SLOWLY ONE LOCATION AGO - AFTER - SAME ACTUALLY THEORY- NORTHAMERICA 30 PANGAEA - CONTINENTS THE - PLATE TECTONICS OCEANS 200 LAURASIA - and all the other seem to stay in the location year year. however, the continents are moving relative to another. In the past two million years, continents have moved from the shown. The theory of, accounts for this movement. to this, the continents and floors are part of about plate, the largest of which are shown. Each plate consist partly of, the outermost layer of the and partly of, a thick layer of hot. The plate slide on the Astenophere, a layer of metal that it is so hot that it flows, even though if it remains solid. millions years all the continents were part of a single land called, Pangaea broke apart into masses called and. In turn, Laurasia and Gondwanaland broke apart. One piece of

4 Gondwanaland, India, later joined Asia. In the next 50 million years, the continents may move to these locations. 6.- Remember this song about the Water Cycle from last year and answer the questions: a.- What happens with the water and the solar radiation? b.- What do they form when they are in the sky? c.- What happens with the drops of water when there are many of them? d.- What can we see at the end of the video, a river or an ocean? e.- Did you like the video? Why? Give two reasons. f.- What moves the water cycle? g.- What is evaporation? h.- What does the condensation form? I.- What are cirrus clouds made of? J.- What are the names of the types of clouds? K.- What happens at the end of the video? l.- Name 5 pictures that appear at the end of the video. I.- Complete the following sentences of the song with these words: CIRROS - ROUND RIVER - GROUND OCEAN CLOUD - PRECIPITATION - DOWN HEAVY - SKY COLIFLOWERS GLASS - the clouds get and the rain comes, water in the, in the, in the the water cycle going and some clouds look like tails, that some clouds look like, that cumulus

5 water in a, in a, in a 7.- Work in groups of 5. Build a 3D model of the Earth s layers. Here you have some ideas that can help you (you can use different materials and you can do it in different ways, let your imagination fly). You have to include the following layers: CORE MANTLE CRUST HYDROSPHERE, ATMOSPHERE AND BIOSPHERE. 8.- Read the following text about life on Earth and how everything we have studied these last few days is related. Discussion: What will happen with the Earth in the next 50 years? Of all the planets in our Universe, there is only one we know can support life, the Earth. We have the perfect conditions for life on Earth. With a Sun giving us light and heat, and an atmosphere protecting us from the ultraviolet radiation and providing us with oxygen, the Earth is a lucky planet. About 5 billion years ago, a huge asteroid crashed into the Earth, and tilted it at an angle of exactly 23,5 degrees to the Sun. This cataclysm disaster was essential to create the actual conditions that make possible life on Earth. Without it, we would not have seasons, climates, hot and cold, or landscapes of spectacular beauty. Life was born in our hydrosphere about 4 billion years ago. Since then life has risen, grown and flourished everywhere. Are you aware of how many different and extraordinary conditions joined to make possible the wonderful miracle of life on our planet? But this delicate balance is in danger. This planet struggles to support the growing human being demand. It is time to realize what we have and what we stand to lose.

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