HI guys, in this video I go through some common MCQ errors and misconceptions to ensure that you do not make the same mistake in your exams. 📘FREE COMPREHENSIVE NOTES📘 https://www.freeexamacademy.com 💯EXCLUSIVE RESOURCES💯 Patreon: https://www.patreon.com/cambridgein5minutes Gain instant access to my IGCSE Biology paper 4 training course where I go through some previous exam questions on a topic by topic basis. There's over 100 exclusive videos for you to learn from ! ✅ Solved past papers ✅ Topic based MCQ questions ✅ Powerpoint notes ✅ Mind maps 📝 FREE summary notes for this video📝 https://www.patreon.com/cambridgein5minutes/posts?tag=Free%20Resources 📱SOCIAL MEDIA📱 Facebook: https://www.facebook.com/cambridgein5minutes Instagram: https://www.instagram.com/cambridgein5minutes/

This video is for Edexcel IGCSE Biology 9-1 but is relevant for many GCSE Biology courses. It covers the following objectives from the syllabus 4.16 Understand the biological consequences of pollution of water by sewage. 4.17 Understand the biological consequences of eutrophication caused by leached minerals from fertiliser. You can download a teaching PowerPoint for this topic here: https://www.mrexham.com/4-ecology-and-the-environment.html Or one for the whole course here: https://www.mrexham.com/store/p118/Ultimate_IGCSE_Presentation.html

Hank gives the rundown on the top five ways humans are negatively impacting the environment and having detrimental effects on the valuable ecosystem services which a healthy biosphere provides. Table of Contents Ecosystem Services 00:51 The Importance of Biodiversity 04:07 Deforestation 06:42 Desertification 06:49 Global Warming 07:59 Invasive Species 08:51 Overharvesting 09:20 Crash Course/SciShow videos referenced in this episode: Hydrologic and Carbon Cycles: http://www.youtube.com/watch?v=2D7hZpIYlCA Nitrogen and Phosphorus Cycles: http://www.youtube.com/watch?v=leHy-Y_8nRs Ecological Succession: http://www.youtube.com/watch?v=jZKIHe2LDP8 Climate Change: http://www.youtube.com/watch?v=M2Jxs7lR8ZI Invasive Species: http://www.youtube.com/watch?v=eDOwTXobJ3k Food Shortage: http://www.youtube.com/watch?v=bPLJP84xL9A References: http://www.fs.fed.us/ecosystemservices/About_ES/index.shtml http://www.endangeredspeciesinternational.org/overview5.html http://www.epa.gov/acidrain/effects/surface_water.html Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids

For thousands of questions and detailed answers, check out our GCSE workbooks https://www.amazon.co.uk/Dr-Shaun-Donnelly/e/B084FH9JPF?ref_=dbs_p_pbk_r00_abau_000000&_encoding=UTF8&tag=freesciencele-21&linkCode=ur2&linkId=1fbc0f5c3e7450e895637b56ee343168&camp=1634&creative=6738 Great deals on workbooks for schools https://www.freesciencelessons.co.uk/school-licences/ In this video, we look at the different ways that we can reduce the loss of biodiversity. This video is based on the AQA spec. This video may be appropriate for iGCSE / O Level Biology. Please consult your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks. Image credits: Sumatran Tiger By Captain Herbert - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=8120885 Wetlands "http://www.geograph.org.uk/photo/34272 Janine Forbes " Field margin "https://commons.wikimedia.org/wiki/File:Insect-friendly_field_margin_at_Morden_Grange_Farm_-_geograph.org.uk_-_510188.jpg Keith Edkins / Insect-friendly field margin at Morden Grange Farm" Hedgerow "https://commons.wikimedia.org/wiki/File:Hedgerow_at_Chilswell_-_geograph.org.uk_-_1421602.jpg Steve Daniels / Hedgerow at Chilswell" Deforestation By Ibama from Brasil - Operação Hymenaea, Julho/2016, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=51685896 Wind farm By Steve Fareham, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=6106414 Recycling bins By Bidgee - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=66893763 Music credit: Deliberate Thought by Kevin MacLeod is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/?keywords=deliberate+thought Artist: http://incompetech.com/

What Is Eutrophication | Agriculture | Biology | FuseSchool What happens when fertilisers get washed into lakes and rivers? A process called eutrophication. Learn all about it in this video. Eutrophication is the process that can happen in a water body, like a river or a lake, when too many nutrients are added to the system. Eutrophication starts with fertilisers, which are rich in nutrients like nitrate and phosphate, are washed into the river or lake system. This leads to an increase in nutrient concentrations in the water. The nutrients are food for algae. The algae grow and reproduce quickly, forming a thick green bloom in the water. This algal bloom will absorb sunlight shining on the water so the sunlight can't reach the bottom. Plants who need this light to photosynthesis will die. The algae will also start to die when they eat up all of the nutrients and run out of food. Next, bacteria start to breakdown the dead plants and algae. That releases more nutrients back into the water continuing the Algal Bloom Cycle. The bacteria, with a continuing supply of food, reproduce into much larger numbers consuming oxygen as they grow and respire. There is not much oxygen in the water to begin with so when the bacteria consume it quickly it might run out completely. Water without oxygen is called Anoxic. If the water turns anoxic, all non-bacterial life in the water, including fish and other animals, will die. So, eutrophication happens when nutrients are added to water which causes an algal bloom, cutting off sunlight and feeding bacteria. The bacteria use up oxygen in the water which becomes an anoxic, causing everything living in the water to die. Eutrophication is one reason why we need to be careful with fertilisers when we are growing crops. SUPPORT US ON PATREON https://www.patreon.com/fuseschool SUBSCRIBE to the FuseSchool YouTube channel for many more educational videos. Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT. VISIT us at www.fuseschool.org, where all of our videos are carefully organised into topics and specific orders, and to see what else we have on offer. Comment, like and share with other learners. You can both ask and answer questions, and teachers will get back to you. These videos can be used in a flipped classroom model or as a revision aid. Find all of our Chemistry videos here: https://www.youtube.com/playlist?list=PLW0gavSzhMlReKGMVfUt6YuNQsO0bqSMV Find all of our Biology videos here: https://www.youtube.com/playlist?list=PLW0gavSzhMlQYSpKryVcEr3ERup5SxHl0 Find all of our Physics videos here: https://www.youtube.com/playlist?list=PLW0gavSzhMlTWm6Sr5uN2Uv5TXHiZUq8b Find all of our Maths videos here: https://www.youtube.com/playlist?list=PLW0gavSzhMlTKBNbHH5u1SNnsrOaacKLu Instagram: https://www.instagram.com/fuseschool/ Facebook: https://www.facebook.com/fuseschool/ Twitter: https://twitter.com/fuseSchool Access a deeper Learning Experience in the FuseSchool platform and app: www.fuseschool.org Follow us: http://www.youtube.com/fuseschool Befriend us: http://www.facebook.com/fuseschool This is an Open Educational Resource. If you would like to use the video, please contact us: info@fuseschool.org

Human Impact In this video we'll learn about how human activity has a negative impact on the Earth because of burning fossil fuels, deforestation and creating waste. CREDITS Animation & Design: Joshua Thomas jtmotion101@gmail.com Narration: Dale Bennett Script: Gemma Young VISIT US Website: www.fuseschool.org Twitter: https://twitter.com/fuseSchool Instagram: https://www.instagram.com/fuseschool/?hl=en Facebook: http://www.facebook.com/fuseschool This Open Educational Resource is free of charge, under a Creative Commons License: Attribution-NonCommercial CC BY-NC. You are allowed to download the video for nonprofit, educational use. If you would like to modify the video, please contact us: info@fuseschool.org

Like all living organisms, humans need resources to live. We need food, clean water and a shelter to live in. A few thousand years ago, this is all we would have wanted - a full stomach and a warm, dry home. But, as the human race has developed we now have a need for other, more luxury items - maybe a bicycle or car to get us from a to b, electricity, even the internet. And all these things require resources, lots and lots of resources such as fossil fuels and metals. Many of these resources are limited - once all the fossil fuels have been extracted from the Earth and burned to provide us with fuels and electricity, there will be none left. How will future generations of humans cope without the things we take for granted? And that’s before we even consider the effect the burning of fossil fuels is having on our planet and the climate… future generations will also have to deal with the effects of that too. Sustainable development involves making sure that there will be resources left for future generations. One way is to use renewable resources, such as solar energy, wind and biogas, to generate electricity rather than fossil fuels.Another example is using quick growing trees, like pine, as a source of wood. These trees can be cut down and replanted, providing an ever-ready supply. This is more sustainable than using slow growing trees like oak, which take hundreds of years to reach maturity. Recycling plastics, metals and paper means that fewer resources need to be extracted from the earth, as we can reuse the already extracted products, meaning more resources for future generations. As the human population grows, so does the demand for food. There is limited farmland, soil fertility, water and fish-stocks. So we should also be using sustainable ways of growing, catching and farming food. We remove more than 77 billion kilograms of fish from the oceans each year! Unsurprisingly, the number of some species of fish in the wild are declining because of overfishing: we’re taking fish from the sea faster than populations can reproduce. Some species of fish are endangered because of this, and might go extinct if their populations continue to fall. There are several initiatives that have been introduced to help conserve fish populations and allow us to enjoy eating fish now and in the future. Fishing quotas are strict numbers of fish that limit the amount of fish that people can catch. This reduces the amount of fish being taken from the sea. The holes on fishing nets have to be large enough to let the smaller, younger fish escape. This then gives them the chance to reproduce, and help maintain the population. Another solution is fish farms. Eating farmed fish reduces the number of fish being caught from the wild. It is important to realise that these initiatives have an impact on the people who rely on fishing for their income. Fishing quotas have helped to increase fish populations, but there has to be a balance between sustainable development for future generations and making sure that people today are also provided for. So, in this video we have covered what sustainable development is and some examples including how to solve the problem of overfishing. SUBSCRIBE to the FuseSchool YouTube channel for many more educational videos. Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT. VISIT us at www.fuseschool.org, where all of our videos are carefully organised into topics and specific orders, and to see what else we have on offer. Comment, like and share with other learners. You can both ask and answer questions, and teachers will get back to you. These videos can be used in a flipped classroom model or as a revision aid. Find all of our Chemistry videos here: https://www.youtube.com/watch?v=cRnpKjHpFyg&list=PLW0gavSzhMlReKGMVfUt6YuNQsO0bqSMV Find all of our Biology videos here: https://www.youtube.com/watch?v=tjkHzEVcyrE&list=PLW0gavSzhMlQYSpKryVcEr3ERup5SxHl0 Find all of our Maths videos here: https://www.youtube.com/watch?v=hJq_cdz_L00&list=PLW0gavSzhMlTyWKCgW1616v3fIywogoZQ Twitter: https://twitter.com/fuseSchool Instagram: @fuseschool Access a deeper Learning Experience in the FuseSchool platform and app: www.fuseschool.org Follow us: http://www.youtube.com/fuseschool Friend us: http://www.facebook.com/fuseschool This Open Educational Resource is free of charge, under a Creative Commons License: Attribution-NonCommercial CC BY-NC ( View License Deed: http://creativecommons.org/licenses/by-nc/4.0/ ). You are allowed to download the video for nonprofit, educational use. If you would like to modify the video, please contact us: info@fuseschool.org

What is global warming and climate change and how will they affect the planet? Learn about how and increase in greenhouses gases is leading to global warming, and how organisms across the world are responding to this warmer world!