Resources by Twig

Volume: Counting Stars

This video, from Twig World, begins by asking how do astronomers estimate the number of stars in the night sky. To explain how it is done, a method of calculating the number of grains of sand on a beach is shown. The same principles are used to estimate the number of stars in the sky.

The video is...

Ways of Looking At The World

This film, from Twig World, explores some of the many ways to explore the Earth and its physical and 'human' features. The key points made in the film are: •Maps have been used by man throughout history to explain and navigate the world. •Traditionally, maps are two-dimensional drawings that use scale to map the...

What is a Light Year?

This film, from Twig World, looks at what a light year is, how it is measured and why we measure distance in terms of time?

The key points made in the film are:

•Light travels through space at 300 million metres per second

•A light year is the distance that light travels in one year

•...

What is a Volcano?

This film, from Twig World, looks at the cycle of lava as a destructive and constructive force, building the structure of volcanoes and powering their devastating impact. The key points made in the film are: •Volcanoes are landforms that occur along plate boundaries. •Volcanoes consist of a magma chamber, main...

What Plants Need to Grow

This film, from Twig World looks at plant nutrition and why nitrates, phosphates, potassium and magnesium are vital for plant health.

The key points in the film are:

•Understanding how plants grow ensures we have food on the table. •Plants need sunlight and air, water and minerals. •If minerals are...

Yellowstone: Supervolcano

This film, from Twig World, looks at the super volcano which lies beneath Yellowstone National Park. The film explores why we can't we see it and whether it ever erupt. The key points made in the film include: •Yellowstone National Park sits on a supervolcano. •Yellowstone boasts hydrothermal features fuelled by...