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Seafloor spreading
The spreading of the seafloor around mid-ocean ridges as new rock is formed in between two tectonic plates. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
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Ore
A type of rock containing minerals from which a useful substance can be extracted. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary...
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Mercury
Where does Mercury fit into the Solar System and what makes this planet unique? Physics - Our Solar System - Learning Points. Mercury is the smallest planet in our Solar System. Mercury is the closest planet to the Sun. Mercury has the...
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Humphead Parrotfish
The amazing grazing habits of the parrotfish, which helps turn hard coral into pure white sand. Biology - Animal Kingdom - Learning Points. Humphead parrotfish are found throughout the Indian and Pacific oceans. Humphead parrotfish feed...
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Weathering: The Breakdown of Rock by Physical and Chemical Processes
The breakdown of rock into smaller pieces by physical and chemical processes at the Earth's surface. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....
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Continental crust
The uppermost layer of the Earth that forms the continents and coastal sea floor, sitting on top of a layer of denser rock called the mantle. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning...
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Molten
A substance that has been converted to liquid form by heating. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce...
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Coastal Processes
A closer look at the three key processes that shape our coasts. What are they and what effects do they have? Earth Science - Geology - Learning Points. Our coastlines are constantly being re-shaped by three key processes. Erosion -...
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Harmful Drugs: Cocaine
Cocaine is derived from the coca plant and is used in powder and rock forms. What effects does cocaine have on the brain and body, and what makes it such an addictive drug? Biology - Healthy Living - Cocaine is a drug derived from the...
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Earthly Treasures: Gold
Gold can be found in many forms and has been used as currency for centuries. But what properties does it have that make it so valuable? Earth Science - Geology - Learning Points. Gold occurs naturally in many distinct forms. Native gold...
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Saturn
Where does Saturn fit into the Solar System and what makes this planet unique? Physics - Our Solar System - Learning Points. Saturn is the 6th planet from the Sun. Saturn has such a low density that it would float on water. There are...
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Shoemaker-Levy
The collision of comet Shoemaker-Levy 9 with Jupiter in 1993 was the first collision of its kind to be witnessed by man. Physics - Universe - Learning Points. The comet Shoemaker-Levy 9 was discovered orbiting Jupiter in 1993....
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Coastal Landforms
Coastal erosion produces beautiful beaches and some rather unusual land formations, from spits to stacks, mud flats to salt marshes. Earth Science - Geology - Learning Points. Cliffs are formed when destructive waves attack the bottom of...
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How Did The Grand Canyon Form?
Learn how the Colorado River carved this incredible land formation, revealing nearly two billion years of the Earth's geological history in the process. Earth Science - Geology - Learning Points. The Grand Canyon is a gorge 2km deep,...
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Danger: Volcanic Ash
When a volcano in Iceland erupted in 2010, hundreds of planes were grounded by volcanic ash. Why? Past experience had shown just how dangerous flying in an ash cloud can be. Earth Science - Geology - Learning Points. In March 2010, the...
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Rock Types - Geological Formations
An explanation of the geological processes which lead to the formation of different types of rock. Earth Science - Geology - Learning Points. There are three types of rock: sedimentary, igneous and metamorphic. Sedimentary rock forms...
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Structure of the Earth
The land surface of the Earth accounts for 1% of its total volume. Travel from the core to Earth's surface, examining the layers that make up our planet. Earth Science - Geology - Learning Points. The Earth is made up of four layers. The...
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The Moon - Earth’s Natural Satellite
An introduction to the Earth's moon. What makes a moon a moon? Physics - Our Solar System - Learning Points. A moon is a natural satellite. Our Moon orbits the Earth roughly every 28 days. The Moon's glow is caused by the reflection of...
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How Did the Continents Form?
Explore the theory of Continental Drift: have the continents always been in the same place? And are they stationary now? Earth Science - Geology - Learning Points. 250 million years ago, most of the world's land mass was joined together....
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Rock Cycles
Rocks are constantly on the move. Eroded by water, sinking into the sea, and ejected by volcanoes, rocks have their very own cycle of existence. Earth Science - Geology - Learning Points. The rock cycle is the process of rocks weathering...
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Yosemite's Valleys
The landscape of this national park was shaped by ice - carving the valleys, waterfalls and sheer cliffs that attract tourists from all over the world. Earth Science - Geology - Learning Points. Glacial ice has reshaped the landscape of...
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Limestone: Features
Easily eroded by water, limestone's composition means it makes up spectacular sights all over the world. Learn about some of the surface and underground features of this rock type. Earth Science - Geology - Learning Points. Limestone is...
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What is a Volcano?
The cycle of lava as a destructive and constructive force, building the structure of volcanoes and powering their devastating impact. Earth Science - Geology - Learning Points. Volcanoes are landforms that occur along plate boundaries....
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How Are Rivers Formed?
From source to the sea, this film reveals how rivers are formed, and discovers why the Amazon River came to be so big. Earth Science - Geology - Learning Points. Rivers are vital to life on Earth. Rivers are formed from meltwater from...