Bozeman Science
Energy Flow in Ecosystems
In this video Paul Andersen explains how energy flows in ecosystems. Energy enters via producers through photosynthesis or chemosynthesis. Producers and consumers release the energy from food through cellular respiration. An explanation...
Bozeman Science
ATP: Adenosine Triphosphate
Paul Andersen explains the structure, function and importance of adenosine triphosphate (ATP). He begins by describing the specific structure of the molecule and its three main parts: adenine, ribose sugar, and phosphate groups. He...
Curated Video
Aerobic Respiration: Oxygen-Powered Energy
Respiration that uses oxygen. This is the main chemical reaction that occurs in all our cells to release energy that our bodies can use. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images...
Curated Video
Respiration
The chemical reaction that takes place in all living cells to release energy from glucose. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science...
Curated Video
The Elements: Oxygen
One of the most abundant elements, oxygen is vital to all life on Earth. Chemistry - Periodic Table - Learning Points. Oxygen makes up 21% of Earth's atmosphere. Two-thirds of the human body is made of oxygen. Oxygen is essential for...
Curated Video
Glucose
A simple sugar that plays a very important role in all living things. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...
Curated Video
Root Hairs
Find out how remarkable adaptations allow the spinifex plant to thrive in the desert. Biology - Plants - Learning Points. Root hairs are specially adapted to suit their role. Root hairs increase the surface area of the roots for...
Curated Video
What is a Calorie?
Everything we eat contains calories. We need them to function and carry out everyday tasks. How do we know which foods are right to eat and which contain 'empty calories'? Chemistry - Chemical Industries - Learning Points. Calories are...
Curated Video
What is a Cell? - Life’s Building Blocks
Every living thing on our planet, from plants to animals, is made up of cells. Cells are the building blocks of life, but what are they and how do they work? Biology - Cells And DNA - Learning Points. All cells have vital genetic...
Curated Video
The Carbon Cycle
Through organic matter, rocks and the oceans, the element central to all life on Earth is constantly on the move. Earth Science - Earth's Resources - Learning Points. The carbon cycle is a transfer of carbon between living matter and the...
Curated Video
Photosynthesis and Starch
We put three different plants under different conditions to demonstrate that both light and carbon dioxide are needed for photosynthesis to occur. A leaf from each plant is taken and heated in ethanol to remove the pigment. These are...
Curated Video
Measuring Food Energy
We investigate the amount of energy stored in maize snacks and peanuts by burning them. The food is placed under an aluminium beaker of water before being set alight and the temperature change of the water is recorded. We can compare the...
Curated Video
Microbes in Milk
We examine the number of microorganisms in different types of milk using resazurin indicator. Samples of pasteurised milk, UHT milk and powdered milk are left in the open for three days before resazurin indicator is added and the samples...
Curated Video
Anaerobic Respiration: Observing Yeast's Oxygen-Free Energy Production
We use yeast to let us observe anaerobic respiration. The yeast is added to warm water and glucose. A layer of oil is placed over the solution so that no oxygen is available. The solution starts to bubble and the gas produced passes...
Curated Video
Aerobic Respiration: Observing Oxygen Use in Maggots
We use maggots to let us observe aerobic respiration. The maggots are placed over sodium hydroxide in a specimen tube. A bung and delivery tube are attached to the specimen tube that feed into a boiling tube of coloured water. In the...
Curated Video
Asellus Blood Flow
We use a microscope to examine the blood flow in the open circulatory system of asellus aquaticus. We are able to see the haemolymph moving through its limbs in different directions. Biology - Human Body - Learning Points. Large...
Curated Video
The respiratory system – Big reveal
What is it? These are the gills of a shark! Life processes - Body systems - The respiratory system A Twig Tidbit Film - Big Reveal. The image zooms out from an extreme close-up to full frame. The children have to guess what the image is.
Curated Video
The respiratory system – Clip
Find out why the sperm whale can dive deeper than any other mammal in order to hunt. Life processes - Body systems - The respiratory system Learning Points Sperm whales can hold their breath for up to two hours. A Twig Tidbit Film -...
Curated Video
The respiratory system – Odd one out
Four sea creatures are shown, but which is the odd one out? Life processes - Body systems - The respiratory system A Twig Tidbit Film - Odd one out. The children have to work out which of four images is the odd one out.
Curated Video
You are one big chemical reaction
Did you know you are one big walking talking chemical reaction? Material processes - Changing materials - Chemical reactions Learning Points Chemical reactions happen inside the human body. Respiration is a chemical reaction that...
Curated Video
Follow a human breath
Follow the journey of a human breath. Life processes - Body systems - The respiratory system Learning Points As we inhale, air travels down the trachea to the lungs. Oxygen in the lungs passes through bronchioles and air sacs into the...
Curated Video
Adaptation - Survival Mechanisms
Discover the incredible ways in which animals and plants adapt to their environments. Life processes - Living things in their environments - Adaptation Learning Points Plants and animals adapt to their environment in order to survive....
Curated Video
Snub-nosed monkey
Case study of the adaptations of this unique and fascinating monkey. Life processes - Living things in their environments - Adaptation Learning Points Plants and animals adapt to their environment in order to survive. A Twig Context...
Curated Video
Why is urine yellow?
Urine is a waste product produced by humans and animals. Why is it yellow? Life processes - Living processes - Excretion Learning Points Urine is produced by the kidneys and is excreted through the bladder. Urine is mostly water, excess...