Curated Video
Why are There 30 Million Horseshoe Crabs on This Beach?
Every spring, the beaches of Delaware Bay play host to one of the world’s wildest parties. Millions of prehistoric crabs (and hundreds of thousands of birds) converge here. These horseshoe crabs spend most of their lives in the ocean...
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What Makes These Dunes Sing?
Why do dunes sing? Head into the mysterious world of sand with host Joe Hanson! Along the way we meet Dr. Melany Hunt and Dr. Nathalie Vriend who solved the longstanding mystery of why dunes sing.
Curated Video
Heat resistant
The ability of a substance to withstand the effects of high temperature without being permanently changed. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
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Oxide
Any compound in which oxygen is combined with another element. 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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The Elements: Silicon
Discover the unique properties of silicon, which is found in many things from sand to computers. Chemistry - Periodic Table - Learning Points. Silicon is a metalloid element. Silicon is found in sand, quartz, the Sun and stars. Silicon...
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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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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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Pressure and Surface Area
Learn how surface area can affect the amount of pressure exerted, and why this is useful in life? Physics - Forces - Learning Points. Pressure is the amount of force acting on a set area. Pressure is measured in pascals. Pressure can be...
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Salt: Food Preservative
Salt was discovered thousands of years ago as a way of preserving food. How does it do this? And what else does salt preserve? Chemistry - Chemical Industries - Learning Points. Food rots because of bacteria and fungi. Salt is an...
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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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Oceans: The Intertidal Zone
Discover how ever-changing tidal ecosystems create opportunities for both predators and prey. Biology - Ecosystems - Learning Points. Tides are a powerful force of nature, created by the Moon's gravitational pull. Tides affect marine...
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Secret of the Sahara
It may be dry and sandy now, but the Sahara desert used to look very different. Evidence buried deep beneath the dunes reveals that the landscape has been changing naturally over thousands of years. Earth Science - Weather - Learning...
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Extreme Living: The Sahara
How satellite images revealed agriculture could be possible in one of the driest environments on the planet. Human Geography - Orientation And Settlements - Learning Points. 30% of the world's freshwater reserves are locked away...
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Filtration and Evaporation
We use filtration and evaporation to separate out a mixture of water, sand and salt. The sand is removed using filtration, as it did not dissolve in the water. The remaining solution is heated until the water evaporates, leaving behind...
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Leaf Chromatography
We separate the different pigments in a beech leaf using chromatography. The leaf is broken up and ground with sand and propanone before being transferred to some chromatography paper. This is then lowered into pigment solvent and we can...
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Volume: Counting Stars
How many stars are there in the Universe? Astronomers calculate it the same way they would grains of sand on a beach... using volume. Maths - Measurement A Twig Math Film. Reinforce and extend the learning required by the curriculum....
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Weathering: The Erosion of Rock by Natural Forces
The physical, biological or chemical factors that erode rock, from sand to ice, rain to plants, and even footsteps. Earth Science - Geology - Learning Points. "Weathering" refers to the breakdown of rocks into smaller pieces. Physical...
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Thorny Devil
Discover the remarkable characteristics that make this odd-looking reptile well adapted for life in the desert. Biology - Animal Kingdom - Learning Points. The thorny devil is a small lizard native to Australia. The thorny devil can suck...
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Solids – True or false
True or false ... Only liquids can be poured? Material processes - Solids, liquids and gases - Solids Learning Points Some solids, such as sand, can be "poured" because of gaps between particles. A Twig Tidbit Film - True or False? The...
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Obtaining food – Clip
Find out about the bubbler crab's interesting way of finding food and dealing with waste. Life processes - Living things in their environments - Obtaining food Learning Points Some animals use specific techniques to obtain food. A Twig...
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What is soil?
Discover the millions of microorganisms in soil. Material processes - Classifying materials - Soil Learning Points Soil is a mixture of rock particles, organic matter, air and water. Soil is formed over many years when rock is weathered...
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What is glass made of?
We use glass every day, but how is is made? Material processes - Changing materials - More chemical reactions Learning Points An endothermic reaction absorbs heat energy. Chemical reactions can change the properties of materials. A Twig...
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Grizzly Bears - Seasonal Survival
Investigate how the life of the grizzly bears is influenced by the seasons. Physical processes -The Earth and beyond - Seasons Learning Points Hibernation is a long sleep many animals take through winter. Before hibernation, grizzly...
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The grunion fish
Meet the grunion fish, an ordinary-looking fish whose extraordinary life is ruled by the phases of the Moon. Physical processes -The Earth and beyond - The Moon Learning Points The grunion fish breeds in time with the phases of the Moon....