Difference between revisions of "PhET/C2/The-Greenhouse-Effect/English-timed"
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|| 00:01 | || 00:01 | ||
− | || Welcome to this tutorial on '''Greenhouse Effect''', an | + | || Welcome to this tutorial on '''Greenhouse Effect''', an interactive '''PhET simulation'''. |
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|| 00:07 | || 00:07 | ||
− | || In this tutorial, we will | + | || In this tutorial, we will demonstrate '''Greenhouse Effect''', using Interactive '''PhET simulation'''. |
|- | |- | ||
|| 00:14 | || 00:14 | ||
− | || To follow this tutorial you should have knowledge of | + | || To follow this tutorial, you should have knowledge of high-School science. |
|- | |- | ||
|| 00:20 | || 00:20 | ||
− | || Here I am using- Ubuntu Linux OS version 14.04 | + | || Here I am using- '''Ubuntu Linux OS''' version 14.04 |
|- | |- | ||
|| 00:26 | || 00:26 | ||
− | ||Java version 1.7.0 | + | ||'''Java''' version 1.7.0 |
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|| 00:30 | || 00:30 | ||
− | ||Firefox Web Browser version 53.02.2. | + | ||'''Firefox Web Browser''' version 53.02.2. |
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|| 00:36 | || 00:36 | ||
− | || Using this simulation students will learn | + | || Using this simulation, students will learn: |
+ | 1. Effect of greenhouse gases on atmospheric temperature. | ||
|- | |- | ||
||00:44 | ||00:44 | ||
− | || Explore and compare the atmosphere of '''Ice age''' and | + | || 2. Explore and compare the atmosphere of '''Ice age''' and today. |
|- | |- | ||
||00:49 | ||00:49 | ||
− | || Effect of '''Glass panes''' and '''Clouds''' on atmospheric temperature. | + | || 3. Effect of '''Glass panes''' and '''Clouds''' on atmospheric temperature. |
|- | |- | ||
||00:55 | ||00:55 | ||
− | || Interaction of photons with atmospheric gases. | + | || 4. Interaction of photons with atmospheric gases. |
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||00:59 | ||00:59 | ||
− | || Contribution of atmospheric gases to '''Greenhouse Effect'''. | + | || 5. Contribution of atmospheric gases to '''Greenhouse Effect'''. |
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|| 01:04 | || 01:04 | ||
− | || '''Greenhouse Effect''' | + | || '''Greenhouse Effect''': |
− | It is a phenomenon in which | + | It is a phenomenon in which earth's atmosphere traps radiation emitted by Sun. |
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||01:58 | ||01:58 | ||
− | || Use the following link to download the simulation. | + | || Use the following '''link''' to download the '''simulation'''. |
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||02:08 | ||02:08 | ||
− | || I will open the simulation using the terminal. | + | || I will open the simulation using the '''terminal'''. |
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||02:14 | ||02:14 | ||
− | || At the prompt type '''cd Downloads''' and press | + | || At the prompt, type: '''cd Downloads''' and press '''Enter'''. |
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||02:20 | ||02:20 | ||
− | || Then type | + | || Then type: '''java space hyphen jar space greenhouse_en.jar''' and press '''Enter'''. |
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|| 02:35 | || 02:35 | ||
− | || The simulation has 3 screens | + | || The simulation has 3 screens: |
− | '''Greenhouse Effect''' | + | '''Greenhouse Effect''', |
'''Glass Layers''' and | '''Glass Layers''' and | ||
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||02:54 | ||02:54 | ||
− | || The radiated heat from Earth's surface is shown as red infrared photons. | + | || The radiated heat from Earth's surface is shown as red '''infrared photons'''. |
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|| 03:00 | || 03:00 | ||
− | || On the right-hand side panel, we have options to explore the atmosphere. | + | || On the right-hand side '''panel''', we have options to explore the atmosphere. |
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||03:06 | ||03:06 | ||
− | || By default '''Atmosphere during''' is set as '''Today'''. | + | || By default, '''Atmosphere during''' is set as '''Today'''. |
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||03:23 | ||03:23 | ||
− | || '''Options''' panel has radio buttons to display temperature in | + | || '''Options''' panel has radio-buttons to display temperature in '''Fahrenheit''' or '''Celsius''' units. |
|- | |- | ||
|| 03:31 | || 03:31 | ||
− | || At the bottom of the screen there are buttons to '''Pause''' and '''Play''' simulation. | + | || At the bottom of the screen, there are buttons to '''Pause''' and '''Play''' simulation. |
|- | |- | ||
||03:37 | ||03:37 | ||
− | || Drag the slider to change the speed of the animation from '''fast''' to '''slow'''. | + | || Drag the '''slider''' to change the speed of the '''animation''' from '''fast''' to '''slow'''. |
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|| 03:44 | || 03:44 | ||
− | || Observe the temperature on the | + | || Observe the temperature on the thermometer. |
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||03:57 | ||03:57 | ||
− | || Then drag the '''Greenhouse Gas Concentration''' slider towards '''Lots''' . | + | || Then drag the '''Greenhouse Gas Concentration''' slider towards '''Lots'''. . |
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|| 04:03 | || 04:03 | ||
− | || Observe the temperature on the | + | || Observe the temperature on the thermometer. |
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||04:23 | ||04:23 | ||
− | || Observe the temperature. Note that | + | || Observe the temperature. Note that '''Clouds''' will help the atmosphere to retain heat. |
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||04:36 | ||04:36 | ||
− | || Click on '''1750''' radio button. | + | || Click on '''1750''' radio-button. |
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|| 04:58 | || 04:58 | ||
− | || Click on '''Reset All''' button at the bottom of the screen to reset the simulation. | + | || Click on '''Reset All''' button at the bottom of the '''screen''' to '''reset''' the simulation. |
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|| 05:08 | || 05:08 | ||
− | || Now let us explore other screens in this window. | + | || Now, let us explore other screens in this window. |
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||05:46 | ||05:46 | ||
− | || Click on '''Atmospheric Gases''' radio buttons, one by one and check the vibrations. | + | || Click on '''Atmospheric Gases''' radio buttons, one by one, and check the vibrations. |
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||06:04 | ||06:04 | ||
− | || Drag the | + | || Drag the '''slider'''s for the respective atoms. |
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|| 06:31 | || 06:31 | ||
− | || In this tutorial we have learnt | + | || In this tutorial, we have learnt about the effect of greenhouse gases on atmospheric temperature, |
|- | |- | ||
||06:38 | ||06:38 | ||
− | || | + | || compared the atmosphere of '''Ice age''' and '''Today''', |
|- | |- | ||
||06:43 | ||06:43 | ||
− | || | + | || effect of '''Glass panes''' and '''Clouds''' on atmospheric temperature, |
|- | |- | ||
|| 06:48 | || 06:48 | ||
− | || | + | || interaction of photons with atmospheric gases, |
|- | |- | ||
||06:52 | ||06:52 | ||
− | || | + | || contribution of atmospheric gases to '''Greenhouse Effect'''. |
|- | |- | ||
|| 06:57 | || 06:57 | ||
− | || As an assignment, | + | || As an assignment, compare atmospheric temperature during 18<sup>th</sup> century and '''Ice age'''. |
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|| 07:22 | || 07:22 | ||
− | || The video at the following link summarizes the Spoken Tutorial project. | + | || The video at the following link summarizes the '''Spoken Tutorial''' project. |
− | + | ||
Please download and watch it. | Please download and watch it. | ||
|- | |- | ||
|| 07:31 | || 07:31 | ||
− | || The '''Spoken Tutorial Project''' team | + | || The '''Spoken Tutorial Project''' team conducts workshops using spoken tutorials and gives certificates on passing online tests. |
− | + | ||
− | gives certificates on passing online tests. | + | |
|- | |- | ||
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||07:57 | ||07:57 | ||
− | || Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India. | + | || '''Spoken Tutorial''' Project is funded by '''NMEICT, MHRD,''' Government of India. |
− | + | ||
More information on this mission is available at this link. | More information on this mission is available at this link. | ||
Latest revision as of 12:36, 13 August 2018
Time | Narration |
00:01 | Welcome to this tutorial on Greenhouse Effect, an interactive PhET simulation. |
00:07 | In this tutorial, we will demonstrate Greenhouse Effect, using Interactive PhET simulation. |
00:14 | To follow this tutorial, you should have knowledge of high-School science. |
00:20 | Here I am using- Ubuntu Linux OS version 14.04 |
00:26 | Java version 1.7.0 |
00:30 | Firefox Web Browser version 53.02.2. |
00:36 | Using this simulation, students will learn:
1. Effect of greenhouse gases on atmospheric temperature. |
00:44 | 2. Explore and compare the atmosphere of Ice age and today. |
00:49 | 3. Effect of Glass panes and Clouds on atmospheric temperature. |
00:55 | 4. Interaction of photons with atmospheric gases. |
00:59 | 5. Contribution of atmospheric gases to Greenhouse Effect. |
01:04 | Greenhouse Effect:
It is a phenomenon in which earth's atmosphere traps radiation emitted by Sun. |
01:13 | This effect is caused by gases in the atmosphere. |
01:17 | They retain the heat radiated back from earth's surface. |
01:22 | This slide shows greenhouse gases and their percentages. |
01:27 | This process is similar to what happens inside a Greenhouse. |
01:32 | In cold places, fruits and vegetables are grown in glass covered area called a Greenhouse. |
01:40 | In a Greenhouse, solar radiations pass through the transparent glass and heat up the soil. |
01:47 | Some of this heat is absorbed by the glass and some is reflected. |
01:52 | This mechanism keeps the energy of the sun trapped in the Greenhouse. |
01:58 | Use the following link to download the simulation. |
02:02 | I have already downloaded the Greenhouse Effect simulation to my Downloads folder. |
02:08 | I will open the simulation using the terminal. |
02:12 | Open the terminal. |
02:14 | At the prompt, type: cd Downloads and press Enter. |
02:20 | Then type: java space hyphen jar space greenhouse_en.jar and press Enter. |
02:31 | Greenhouse Effect simulation opens. |
02:35 | The simulation has 3 screens:
Greenhouse Effect, Glass Layers and Photon Absorption. |
02:45 | Greenhouse Effect screen shows Earth's atmosphere. |
02:49 | Light from Sun is depicted as yellow photons. |
02:54 | The radiated heat from Earth's surface is shown as red infrared photons. |
03:00 | On the right-hand side panel, we have options to explore the atmosphere. |
03:06 | By default, Atmosphere during is set as Today. |
03:11 | Observe the composition of greenhouse gases for Today's Atmosphere. |
03:16 | There is a thermometer to record the temperature in Kelvin and Fahrenheit scales. |
03:23 | Options panel has radio-buttons to display temperature in Fahrenheit or Celsius units. |
03:31 | At the bottom of the screen, there are buttons to Pause and Play simulation. |
03:37 | Drag the slider to change the speed of the animation from fast to slow. |
03:44 | Observe the temperature on the thermometer. |
03:48 | Click on Adjustable concentration button. |
03:52 | It will increase the concentration of greenhouse gases. |
03:57 | Then drag the Greenhouse Gas Concentration slider towards Lots. . |
04:03 | Observe the temperature on the thermometer. |
04:07 | As the concentration of greenhouse gases increases, temperature increases. |
04:13 | Does clouds in atmosphere help in reducing the Greenhouse Effect? |
04:18 | Add Clouds to the simulation from the Options menu. |
04:23 | Observe the temperature. Note that Clouds will help the atmosphere to retain heat. |
04:30 | You can also compare the atmosphere during 18th century and Ice age. |
04:36 | Click on 1750 radio-button. |
04:40 | Note the composition of greenhouse gases. |
04:44 | Click on Ice age radio button. |
04:47 | Note the change in composition of greenhouse gases. |
04:52 | Percentage composition of greenhouse gases in Ice age is much lower. |
04:58 | Click on Reset All button at the bottom of the screen to reset the simulation. |
05:04 | Click on Yes to confirm your action. |
05:08 | Now, let us explore other screens in this window. |
05:13 | Click on Glass Layers tab. |
05:16 | Here, we have an option to add Glass Panes to the simulation. |
05:22 | This helps to understand the effect of Glass Panes on atmospheric temperature. |
05:28 | Let us add a Glass Pane and observe the change in temperature. |
05:33 | Add more Glass Panes and see what happens. |
05:38 | Click on Photon Absorption tab. |
05:41 | Drag the Infrared Photon slider to release the photons. |
05:46 | Click on Atmospheric Gases radio buttons, one by one, and check the vibrations. |
06:00 | Click on Build Atmosphere radio button. |
06:04 | Drag the sliders for the respective atoms. |
06:19 | Then drag the slider for releasing Infrared or Visible Photons. |
06:25 | Observe the vibrations of the molecules. |
06:29 | Let us summarize. |
06:31 | In this tutorial, we have learnt about the effect of greenhouse gases on atmospheric temperature, |
06:38 | compared the atmosphere of Ice age and Today, |
06:43 | effect of Glass panes and Clouds on atmospheric temperature, |
06:48 | interaction of photons with atmospheric gases, |
06:52 | contribution of atmospheric gases to Greenhouse Effect. |
06:57 | As an assignment, compare atmospheric temperature during 18th century and Ice age. |
07:05 | Add Clouds to the simulation and observe the changes in the temperature. |
07:11 | Explore Glass layers and Photon Absorption screens. |
07:16 | Explain why Glass panes increase the temperature of the atmosphere. |
07:22 | The video at the following link summarizes the Spoken Tutorial project.
Please download and watch it. |
07:31 | The Spoken Tutorial Project team conducts workshops using spoken tutorials and gives certificates on passing online tests. |
07:41 | For more details, please write to us. |
07:45 | Please post your timed queries on this forum. |
07:49 | This project is partially funded by Pandit Madan Mohan Malaviya National Mission on Teachers and Teaching. |
07:57 | Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India.
More information on this mission is available at this link. |
08:09 | This tutorial is contributed by Snehalatha Kaliappan and Meenal Ghoderao from IIT-Bombay.
Thank you for joining |