Series: Earth & Space Sciences
Rocks and minerals have been around since before human beings existed. Since the origins of the human race, we have used them in many diverse ways - from construction to jewelry. But where do they come from? How do they form? And what is the difference between a rock and a mineral? This video explains that we live on a planet compost of rocks. Students will learn the difference between minerals and rocks, they will discover the different types of rocks and how they are formed in the cycle of the rocks. Show Less
This video defines and discusses human and natural pollutants of air and their sources.
Objective: To learn about different methods used for sewage disposal. Learning outcomes - students will be able to: 1. Recognise sewage 2. Describe different methods used for sewage disposal 3. Describe the working process of septic tank 4. Explain working and uses of a biogas plant 5. Demonstrate the process of vermicomposting and its uses Show Less
Visible light, which can be seen with our eyes, comprises a small sliver of the electromagnetic spectrum. The rest of the spectrum, from short wavelength gamma rays to long-wavelength radio waves, requires special instruments to detect. ALMA uses an array of radio telescopes to detect and study radio waves from space. Radio telescopes are typically large parabolic dish antennas used singly or in an array. Radio observatories are preferentially located far from major centres of population to avoid electromagnetic interference (EMI) from radio, TV, radar, and other EMI emitting devices. This is similar to the locating of optical telescopes to avoid light pollution, with the difference being that radio observatories are often placed in valleys to further shield them from EMI as opposed to clear air mountain tops for optical observatories. ALMA is an advanced tool for studying very old stars and galaxies. These objects now are seen at great cosmic distances, with most of their light stretched out to millimetre and sub-millimetre wavelengths by the expansion of the universe. ALMA provides the unprecedented ability to study the processes of star and planet formation. Unimpeded by the dust that obscures visible-light observations, ALMA will be able to reveal the details of young, still-forming stars, and is expected to show young planets still in the process of developing. In addition, ALMA will allow scientists to learn in detail about the complex chemistry of the giant clouds of gas and dust that spawn stars and planetary systems. Show Less
This video explains which of the atmosphere's chemical components are responsible for the aurora borealis.
On a full moon, when the Moon passes directly behind the Earth into its shadow, a lunar eclipse occurs. When the moon is entirely within the umbra, it causes a total lunar eclipse. When only a small part of the Moon’s surface is covered by the umbra, a partial lunar eclipse occurs. Show Less
Change in weather differs from place to place and time to time. The part of the earth facing the sun has day and the other part has night. The sun causes the wind to blow and also changes the state of water from water to water vapour.
Objective: To learn about natural resources, coal, the destructive distillation of coal, the importance of natural gas, the origin of petroleum and about petroleum refining. Learning outcomes - students will be able to: 1. Classify natural resources 2. Describe the importance of renewable and non-renewable natural resources 3. Discuss the prevention of non-renewable natural resources 4. Explain coal 5. Describe the process of formation of coal 6. Discuss types of coal and uses of coal 7. Explain the destructive distillation of coal 8. Explain the formation of natural gas inside the earth’s crust 9. Outline the importance of natural gas 10. Discuss various uses of natural gas 11. Define petroleum 12. Discuss the formation of petroleum 13. Know the uses of petroleum 14. Explain the process of refining petroleum 15. Discuss the different fractions of petroleum in the petroleum refining 16. Describe the uses of petrochemicals Show Less
In this video, students will learn about the consequences of the Earth’s rotation and how it impacts time zones.
This unit introduces concepts such as water as a limited resource and water footprints; explaining to students what the impact on the environment of the production of goods has.
A group of stars which form a pattern is called a constellation. The Ursa Major and Ursa Minor has seven bright stars arranged in the form of a spoon. The Orion has seven bright stars and forms the picture of a hunter. The Scorpius has thirteen bright stars and forms the shape of a scorpion. In the Cassiopeia, there are five prominent stars that, along with other stars, form the image of the Egyptian queen Cassiopeia. Show Less
Pollution refers to the addition of harmful substances into our surroundings. These harmful substances causes harm to all living beings. We must follow the step that are taken to control the different types of pollution.
Using drama skits and animated computer graphics, this program explores the cycles and seasons that dictate life on earth, and answers the following questions: Why do we get day and night? What are seasons and why do they change? Why does the moon change shape? What causes tides? Show Less
Agricultural processes have a large-scale impact on natural resources and ecosystems and many businesses are turning to technology to help. This video introduces some issues that agricultural technologies aim to address, including water scarcity, farm waste and sustainability, with insight from scientists at agricultural research institutes. A highly relevant resource for senior secondary and tertiary students studying design technology, earth and environmental sciences or agriculture. Show Less
Before agricultural technologies can be adopted by businesses, they need to be thoroughly tested and evaluated. This video looks at the techniques and systems researchers use to collect and evaluate data, such as internet-connected sensors and the SF6 tracer, with insight from scientists at agricultural research institutes. A highly relevant resource for senior secondary and tertiary students studying design technology, earth and environmental sciences or agriculture. Show Less
The water that we drink today is the same water that the dinosaurs swam in and that people of ancient civilisations drank – and it’s all because of the wonderful water cycle! This Miniclip illustrates the stages involved in the water cycle, how they are reflected in the states of matter, and how we see each phase occurring in our everyday lives. Students will learn about evaporation, condensation, and precipitation, as well as the renewable nature of this natural resource. Show Less
The Earth is composed of systems and layers that interact with each other, fostering life and making our planet what it is today. These systems include the biosphere, the geosphere, the hydrosphere and the atmosphere. Discover their characteristics, how they interact, and learn that our planet was not always as we know it now. Show Less
The Earth gets all its energy from the Sun. The amount of energy the Earth receives from the Sun is balanced by the amount it loses to space. An increase in the concentration of greenhouse gases affects the Sun - Earth energy balance and causes global warming. Show Less
This video explores the Earth’s relationship with the Sun, and how its motion and annual rotation affect seasonal change on Earth.
Some of Earth’s magnificent landforms are caused by erosion and weathering. But what is erosion and how does it change the Earth’s surface so drastically? This Miniclip explains the process of erosion including the various mechanisms such as water, wind, ice, and mass movement; defines sediment and deposition as part of this process; and explains how human influence has increased its prevalence through global warming and deforestation. Show Less
Come on a voyage through the solar system and discover the size, orbits, rotations, moons and other fascinating facts about the Sun and the eight planets orbiting it. This clip also describes some of the spacecraft and missions that have provided us with all the information we know about the solar system and its planetary inhabitants. Show Less
Heat waves, tropical cyclones, droughts, tornadoes, hailstorms, floods, and severe thunderstorms. These are all examples of extreme weather that shape our landscape. But what exactly are they and how do they happen? This Miniclip explores each of these extreme weather types and examines the natural and human influences that cause them including climate change, the Earth’s atmosphere, ocean currents and more. Show Less