Grade 6 Science Review and Quiz UNIT 7

okay again am audible can you hear me properly yes or no can you hear me okay okay so for this afternoon we are going to have review on land breeze sea breeze monsoon natural disasters and greenhouse effects and then after that we are going to answer the the quiz on page the crease on your book that is 1 to 15 on page 230 okay so let us start with the land breeze okay can you still remember what is land breeze yes or no you still remember what land breeze is okay say listen carefully so it is wind that blows mostly at night it blows from land towards the sea during the night warm air from over the oceans will rise and cool breezes will blow towards ocean as land breeze okay this is the picture of land breeze during the night okay so as you can see look at the arrow class can you explain to me can you explain to me the picture we can explain that once again you did that during your class right yes mean our guy race just tell your name can yes guy yes guys during the night during the day cool air above land moves down cool air moves into the face warm air and warm air above water moves up okay okay thank you so that is the land breeze so the air above the land is cool right and the air above the the sea is warm so what will happen next the cool air above the land will move to the sea and then to replace the warm air on above the sea right and then it will rise up it will go back again go back in cycle okay so that is during the day during the night for land breeze another one is the sea breeze okay when you say sea breeze it is wind that blows mostly during the day okay it blows from sea towards land okay sea breeze from sea towards land okay anyone who can explain to me how does the sea breeze move from from from from land to sea can anyone explain me explain to me anyone can anyone explain how does the land breeze work or the sea breeze work raise your hand please tell your name let's see if you can see remember anyone okay will ask questions okay if there's no students who will volunteer i'm gonna ask questions so it's the look at the air above land is it hot or cold it is hot what is the temperature of the air above land is it hot or cold it's hot it's hot what about the air above the water is it hot or cold it's cold it's cold or it is cool so what will happen if what will happen if the water above the air above water is cool where will it go it will cause whatever it will go toward land that is right so the cool air above water will go towards the land that is why during the day when we are at the beach it is very hot okay and the water is cold the the sand is hot the water is cold okay so next we also have the what is this can anyone tell me what's this monsoon monsoon okay so we have the moon soon what is monsoon in thai by the way are strong winds that change with the seasons okay listen listen should say with the seasons okay take note of that monsoons are strong winds that change with the seasons okay monsoon is seasonal change in the direction of the prevailing or strongest winds of region moonson are winds which bring rainfall into the country okay so we have two kinds of moonsoon right can you tell me the first one always enjoy first the southwest monsoon and the second is north east monsoon okay so when you see southwest monsoon class it is summer monsoon for north east monsoon is the the winter monsoon class take north take note and say southwest monsoon in this type of moon the wind blows from sea to land okay remember sea to land so what is sea to land is it sea breeze or land breeze sea breeze that is right and for north east the wind blows from land to sea basically it is land breeze it is the same with land breeze and sea breeze what is the difference what is the difference what is the difference the difference is they bring rain fall that is right they bring rainfall know they bring rain billionaires then you bring rain together with them with it okay so next after monsoon we talk about okay so i'm gonna show you first this one is the southwest monsoon so as you can see the air together with the rainfall goes from from sea towards land okay that is southwest monsoon and for northeast you can see that the air together with the rainfall blows towards the sea okay so there that's the difference between the southwest moon sun and the northwest or north east monsoon okay next after that what was our next topic after monsoon natural disaster about the natural disasters that is right so can you tell me can you tell me what natural disaster is this it's it's it's flood that is right so flight is an overflow of water that covers the ground or dry land so we also said that there are two types of floods what are those types can you tell me hole at fever falls the flush flood and river flood okay now can you tell me can you tell me what are the causes of flood just one just one cause of light who can give me who can give me can see all of you who can give me one cause of flood bike relax micah you're very relaxer bye can you tell me what is one cause of flood okay who can help bike green wave green wave you want to help mike okay okay green wave can you tell me one cause of flood heavy and long lane very good when you have when we have very heavy and long rainfalls it will cause cause fly that is right okay next is we have landslides okay what is landslides it is the sliding down of lot of soil rocks mud trees from hill or mountain now can you tell me okay who can tell me one cause of landslide mew can you tell me one question of the landslide what causes landslides meal let's ask for your classmate who can help mew me may okay may come on may where's me no me on me me okay let's have mommy me it can cause it can cause after the tsunami of earthquake yes that is right after natural after other natural disasters like floods earthquakes volcanic eruptions right that can cause landslide okay mayo say thank you to ami thank you okay next we have earth what is this earth very good it is this heavy shaking of the ground caused by movement in the earth okay under the earth okay so can you tell me what is the cause of an earthquake can anyone tell me only one cause of earthquake let's have nene nene please yes earthquake are caused by nature and sometime by what women do okay that is right it is caused by nature and sometimes by what humans do large rocks called tectonic plates move under the earth okay earth's surface and then as they move they twist and bend if they break they will give out energy that shakes the ground this is called an earthquake okay so number four we have what is this what is this okay tsunami okay so who will talk next so tonight it's long and high ocean wave caused by earthquakes or landslides in the ocean okay so let's have plane can you tell me what causes tsunami tsunami are caused by earthquakes or landslides in the ocean okay that is right so if you don't know there are earthquake or landslide also under the sea and also volcanoes under the sea so if those natural disasters occur under the sea it will cause tsunami it will cause the the water to rise up on land that causes tsunami okay and it is also very dangerous for those people on the beach on or or beside the ocean okay and what is the number five what's number five what's number five it's the coastal erosion it is the removal of rocks on the land near the ocean and the rocks can be removed by ocean waves and storm next student we have tan cloud what causes coastal erosion what causes coastal erosion it is caused when it is block on milan near the ocean that can be removed by ocean wave f1 okay you can see that on page 212 of your book 212 of your book okay it is cos it's coast celebration monsoon storms hotels and water with the rocks on land or layer the ocean okay thank you okay thank you don so that is all about the natural disasters now let's have the greenhouse effect is to remember what is the greenhouse right of course this is our last topic am sure you still remember what our greenhouse effects yes or no yes or no yes okay now can you tell me what is greenhouse effect can someone tell me okay let's have rain what is greenhouse effect rain you can see that on page 270 or 216. come on guys greenhouse effect is what okay let's hear it from rain greenhouse effect is the warming of earth when the sunshine it warms up to the earth at night earth cools setting heat back into the air but some of the heat is trapped by gases in the air this keeps the earth warm and helps with the life of all living things okay thank you rain so greenhouse effect is the warming of the earth it happens when greenhouse gases in the air trap heat from the sun this makes the earth warm and fit for living for us human humans animals and plants but too much greenhouse gases in the air will cause cloths will cause global warming okay can someone okay can you give me one example of greenhouse gas want greenway green wave is finished sorry green wave is finished let's have bua can you give me one greenhouse gas t-shirt last week have unboxing did yeah okay okay okay got it okay so let's have supernat supernat is eq right teacher okay eq eq can you tell me example of one greenhouse gas carbon dioxide very good deer okay what else is that from carbon dioxide what else bye one more bite aside from carbon dioxide what else what are other greenhouse gases got bike why okay aside from carbon dioxide what else we have stock matter aside from carbon dioxide what else can you give me more greenhouse gas what is okay just tell me what is n2o what is n2o nitrous nitrous oxide very good okay n2o is nitrous oxide aside from that we also have methane we have chlorofluorocarbon water vapor ozone okay so next this is the thumb up to sum up the greenhouse effect let's watch this video again okay everybody watch hello friends today we're going to learn what is the greenhouse effect have you ever heard of it the greenhouse effect is natural phenomenon which makes do we talk about the greenhouse effect do you know how it works now you're going to understand it better greenhouse is an enclosed structure made of plastic or glass used to grow crops flowers inside the greenhouse to warm it up this way we managed to maintain temperature and humidity in optimum conditions for plants to grow the same effect is produced on our planet how interesting the earth is surrounded by the atmosphere thin gaseous layer which allows part of the solar radiation as is called greenhouse effect gases whose mission is to absorb part of the energy received and maintain the temperature of the planet one of the main greenhouse effect gases is co2 also known as carbon dioxide over the past centuries gases like co2 in the atmosphere became more abundant and for this reason its capacity to the rising of the planet's temperature same as in the greenhouse but the increase of these gases is very bad for the earth why have they become more abundant in the atmosphere with the industrial revolution co2 emissions started to rise owing to the use of fossil fuels like coals cars or airplanes produce great amounts of co2 emissions wow look at all that smoke in the sky similarly great part of the energy we consume is generated by using fossil fuels every time you leave the lights on or any electronic device you're sending more co2 another source of co2 emissions to produce plastic for example we use fossil fuels and we need large amount of electrical energy to do so did you know that the textile industry is highly pollutant intensive farming is also responsible for greenhouse effect gas emissions wildfire as consequence of the greenhouse effect and the rise in global temperature the earth is changing for this reason water shortage desertification the disappearing of lakes or even sea level rise are becoming more and more common worse consequences are predicted in the future if some viable solutions at hand like recycling using renewable energies electric transportation or reducing plastic waste would you like to find out more okay so okay so when we say greenhouse effect it is it is natural and it happens every day okay it controls the temperature on earth and makes living things to live well it makes temperature during the day and at night to almost be the same also class it controls different seasons on earth but in the world today some of our actions make too much greenhouse gases for example burning trees coal and fuel gives off too much carbon dioxide another example is growing too many animals okay refrigerators and air conditioners also nitrogen fertilizers and burning fossil fuels give off too much nitrous oxide now there are also ways to reduce greenhouse gases class right and we have mentioned this on during our discussion can you give me okay okay this is the question what are the ways to reduce greenhouse gases can you give me one can you give me one way to reduce greenhouse gas or greenhouse gases okay anyone you can see that on page 222. what are the ways to reduce greenhouse yes omi use the refrigerator that did not have dfc very good you can use refrigerators that do not use cfcs okay to reduce the emission of chlorofluorocarbon very good okay what else said from thank you aside from using your cars using fuels you can also what use vehicle to that do not use very good guy uh-huh just like bicycle okay you can use vehicles and make use of fuels just like bicycle also we can reduce the use of plastics also or we can reduce recycle and what is the other are reuse okay so those are the ways to reduce greenhouse gases so that is all about our review now are you ready for our activity are you ready for the activity for the quiz yes okay so everybody please open your books to page 230 think it's 230 yeah 230 to 231 did you find it did you find it okay so if this will stop if this meeting will stop i'm gonna send you another link okay okay so number one everybody get your pen please show me your pen let me see let me see let me see okay can see bike cannot see you rain saw you guy saw your meal where's your pan meal pen where is your book okay okay so if everybody's finished or or if everybody is ready let's proceed let's proceed let's start with number one okay number one question do you want to read it or i'll be the one to read okay let me read it for you okay number one which is incorrect about land breeze everybody which is incorrect about land breeze sea breeze and monsoon is it okay look at letter munson's happened in hot places munsons happen from temperature difference in continent and the ocean land and sea breeze happen from temperature difference on land and sea and the land and sea breeze happen during the day monsoons happen during during the night there is night there so which is incorrect class incorrect which one is it or circle the circle the letter of the correct answer land and sea breeze happened during the day monsoons happen during the night is it correct okay if you're finished please raise your pen so that will know if it's time to proceed okay okay very good number two number two which is correct about the effects of south west monsoon this time which one is correct okay letter southwest monsoon or the sea breeze okay letter it brings the rainy season it brings summer see it brings winter or day it brings warm air and dry season which is correct about moon soon okay just the word monsoon or if you're finished raise your pen okay okay okay okay next number three which happens from an earthquake under the sea okay listen number three if there is an earthquake under the sea what will be the natural disaster that will occur is it tsunami flood thunderstorm or coastal erosion which one class which one finished okay okay everybody's finished next number number four which is correct about sea breeze class which is correct about sea breeze it forms at night it pushes fishing boat into the it blows from sea to land or it forms during the day and at night which one is correct okay remember that sea breeze it starts from going to okay finished number five okay everybody's done number five which brings cold dry air to the north and heavy rainfall to the south of thailand okay when you see north class is from mongolia and china okay the the key word is north okay is it land breeze sea breeze north south west monsoon or north east monsoon what type of monsoon is that okay just choose between and which one the key word is north finished i'm i'm i'm giving you the answers already okay number six number six which win comes with the seasons which wind comes which wins come from the season okay is it land breeze breeze monsoon and that is very easy okay and number seven which is sign that toonami could be coming very hot weather near the sea strong winds near the sea sea thunderstorms near the sea or the sea water goes up and down very fast which one okay everybody's finished okay very good next number eight what shows an earthquake class what shows an earthquake broken rocks near the sea water flowing from hills to low lands see heavy rainfall or the heavy shaking of the ground very easy okay number nine which can reduce the harms of landslides planting trees shifting cultivation farming on mountains or cutting down trees and block flush plots which one or very easy rachel pan okay very good next number 10. number 10 what is lot of soil rocks and clay moving down the slope flood landslide earthquake coastal erosion very easy next number eleven number 11 which is incorrect about greenhouse effect which is incorrect not correct reduces number of animals it destroys habitats of living things see it causes global warming it does not affect living things which one less than one minute okay if this