NS 3º U4 L3 Photosynthesis and Respiration - Contenido educativo
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Hello boys and girls. Welcome to a new natural science lesson. In this case, Unit 4, Plants.
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Lesson 3, Photosynthesis and Plant Respiration.
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The first question is, do plants need food?
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Here we can see a plant, water, sunlight, carbon dioxide, and oxygen.
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Photosynthesis.
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Plants need energy.
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This is the type of food they need.
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They make their energy through the photosynthesis.
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Let's do the math.
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Photosynthesis equals to minerals plus water plus sunlight plus carbon dioxide equals to energy plus oxygen.
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As we can see here, minerals, water, sunlight, carbon dioxide, energy, which is the food of the plant, and oxygen, O2.
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Here you have the formula again.
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Why are plants so important for us, humans?
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On the one hand, plants need carbon dioxide and release oxygen.
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On the other side, humans need oxygen and release carbon dioxide.
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This is like a cycle.
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In your notebook, you have this drawing of the photosynthesis process.
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As we can see here, number 1 is water, blue, number 2 are minerals, brown, number 3 is
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carbon dioxide, red, number 4 is sunlight, yellow, number 5 are the stem and leaves,
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green and number 6 is oxygen.
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In the following page we will explain all these numbers.
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one, the roots absorb water from the soil. Number two, the roots absorb minerals
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from the soil. Number three, the leaves absorb carbon dioxide from the air.
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Number four, the leaves absorb sunlight. Number five, water and minerals pass
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through the stem to the leaves. Number six, plants make energy and release
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oxygen which is good for us humans let's talk a little bit now about respiration
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as we can see here we have a day time and the night time plants also need
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oxygen to breathe day time night time the main difference is that during the
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daytime, within the photosynthesis, plants are producing oxygen. They release the
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oxygen that they don't need, but they use a little bit of oxygen. What happens
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during the night time there is no sun no sunlight and plants do not produce oxygen so they take it
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from the air remember this is the main reason why we need plants and plants also need us
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thank you very much for listening
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- Autor/es:
- Fernando García
- Subido por:
- Fernando G.
- Licencia:
- Reconocimiento - No comercial - Sin obra derivada
- Visualizaciones:
- 75
- Fecha:
- 17 de marzo de 2024 - 17:33
- Visibilidad:
- Clave
- Centro:
- CP INF-PRI IPLACEA
- Duración:
- 04′ 56″
- Relación de aspecto:
- 1.78:1
- Resolución:
- 1092x614 píxeles
- Tamaño:
- 17.94 MBytes