The degradation of usable land into desert.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...

An overabundance of nutrients in a body of water, causing excessive plant growth.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

A genetically identical copy of a piece of DNA, or an entire organism.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...

The traditional name for water-soluble salts and minerals that contain potassium.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

The uppermost 5 to 20cm of soil, with a high concentration of organic matter and microorganisms, where almost all of the biological activity in soil takes place.
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A Twig Science
Glossary Film.
Key scientific...

What happens when non-living factors in an ecosystem are altered, such as rainfall or air quality? Biology - Ecosystems - Learning Points. An ecosystem is a living system interacting with its physical habitat. Changes in biotic and...

Plants produce oxygen and provide our food, but what do they need to live? Learn why nitrates, phosphates, potassium and magnesium are vital for plant health. Biology - Plants - Learning Points. Understanding how plants grow ensures we...

Ecosystems are finely balanced environments. The introduction of 'invader' plant species can be disastrous for biodiversity. Biology - Ecosystems - Learning Points. Protecting diverse delicate habitats from invading species is difficult....

Discover how the destruction of the rainforest impacts ecosystems, and begins a cycle that contributes to global warming. Earth Science - Human Impacts - Learning Points. Forests are home to 70% of Earth's land animals and plants....

Genetic Modification allows scientists to manipulate the genetic information of cells, even swapping characteristics between different species. But it is a process which has caused a lot of controversy. Biology - Cells And DNA - Learning...

The global population is growing rapidly and soon the world could be overpopulated. Life as we know it could become unsustainable. What can we do to avoid this? Human Geography - A Changing World - Learning Points. There are over 7.5...

Rural deprivation is when rural areas suffer a lack of resources, amenities or jobs. This can have a widespread effect on the economic status of these areas and the development of a country as a whole. Human Geography - Orientation And...

Fold mountains provide a challenge for humans in many ways. What are the uses of this terrain around the world? And how do these effect the environment of fold mountain ranges? Earth Science - Geology - Learning Points. The impressive...

Discover the hormones that dictate whether a plant grows downwards with gravity, towards water and nutrients, or upwards towards light. Biology - Plants - Learning Points. Tropisms allow plants to seek out the best conditions for...

With global food need increasing, but less new agricultural land available, progressive agricultural methods are needed to feed the world. See some of those methods in action in Brazil. Human Geography - A Changing World - In the last...

An organic compound containing nitrogen that plays an important role in animal metabolism, and is excreted in the urine of mammals. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and...

The Amazon rainforest is being cut down for resources and land at a rapid rate. Learn how alternative farming methods, incentives to cut carbon emissions and protected reserves are helping to conserve the rainforest from further harm....

The Mojave desert in the USA and the Thar Desert of India have very different uses. How do humans manage these environments? And what effect does the economic status of the country have on their development? Earth Science - Human Impacts...

In the Spring of 1980, the Mount St Helens Volcano in Washington State erupted in one of the most violent events in recorded history. But a human catastrophe was prevented due to the More Economically Developed Country's capacity to...

In this film the positive and negative impacts of scientific developments on the environment are explored.
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People and places -Environmental awareness and care - Science and t
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यह वीडियो यूट्रोफिकेशन की प्रक्रिया को समझाता है, जिसमें पोषक तत्वों के अत्यधिक बढ़ने से जल निकायों में शैवाल का तीव्र विकास होता है। यह शैवाल सूर्य की रोशनी को अवरुद्ध करता है, जिससे जलीय पौधों की मृत्यु होती है। शैवाल के मरने पर,...

Explore the intricate communication methods of honeybees, from the circle dance to the waggle dance, used to convey information about food sources to other members of the hive. Learn about the pivotal role of bees as pollinators in...

Explore the concept of the Anthropocene Epic, a proposed geological era marked by humanity's significant impact on Earth's climate and ecosystems. Learn about the debate surrounding its official start, theories including the advent of...

This video is answering the question of how have humans contributed to the greenhouse effect.