26 results for “oxygen”
The Human Body
Lungs and Breathing
oxygen without warning. Oxygen in, carbon dioxide out The air you breathe in is 21 percent
Article · 4 min read
Planet Earth
The Atmosphere
oxygen and just under one percent argon. Everything else, including the carbon dioxide that governs the climate
Article · 4 min read
Plants & Fungi
Photosynthesis: How Plants Eat Light
oxygen. The plant keeps the sugar and releases the oxygen as waste. The sugar is both
Article · 3 min read
Chemistry
Water: The Strangest Ordinary Substance
oxygen atom and two hydrogen atoms, which is where the formula H2O comes from. The atoms
Article · 3 min read
The Human Body
The Heart and Blood
oxygen, enters the right side, which pumps it the short distance to the lungs. There it picks
Article · 4 min read
Space & the Universe
The Life of a Star
oxygen, oxygen into silicon, silicon into iron. Each stage burns faster than the last. The silicon
Article · 3 min read
The Human Body
Muscles
oxygen. Muscles at full effort use energy so fast that oxygen cannot be delivered quickly enough
Article · 4 min read
Chemistry
The Chemistry of Life
oxygen and nitrogen, plus a little phosphorus and sulphur, and you have almost everything a living
Article · 3 min read
Planet Earth
Rocks, Minerals and Fossils
oxygen. Halite, table salt, is sodium and chlorine. Diamond is pure carbon with its atoms locked
Article · 4 min read
Space & the Universe
Nebulae
Oxygen gives blue-green, sulphur a different red. The vivid colours in nebula photographs are real
Article · 3 min read
Planet Earth
The Oceans
oxygen and nutrients around the planet. Twice a day the whole ocean also rises and falls
Article · 4 min read
Life & Biology
What Is Life? The Cell
oxygen, skin cells that form a barrier. All of them descended from a single fertilised egg, and all carry
Article · 4 min read
Chemistry
Chemical Reactions
oxygen molecules. The result is one molecule of carbon dioxide and two of water. Every carbon
Article · 3 min read
Animals
The Octopus
oxygen with a copper-based molecule rather than the iron-based one that makes ours red. It breathes
Article · 3 min read
Life & Biology
DNA and Genes
oxygen to detecting light in your eye. The code is universal. The same triplets mean the same
Article · 4 min read
Space & the Universe
Exoplanets: Worlds Around Other Stars
oxygen alongside methane for example, that on Earth is produced only by living things. What we still
Article · 3 min read
Plants & Fungi
Trees and Forests
oxygen. They give us timber, paper, fruit, nuts, rubber, medicines and shade. And they are the simplest
Article · 4 min read
Animals
Birds
oxygen than a mammal can, which is how geese fly over Everest. Even reproduction is adapted
Article · 3 min read
Animals
Insects
oxygen, dragonflies had wings 70 centimetres across. Why so many? Several things explain the insects' extraordinary
Article · 3 min read
Matter, Energy & Physics
The Periodic Table
oxygen and the elements up to iron by fusion in stellar cores, and the heavier ones
Article · 4 min read
Life & Biology
Bacteria and Viruses
oxygen you breathe, and their ancestors produced all of it in the first place. Inside you, about
Article · 4 min read
The Human Body
The Skeleton and Bones
oxygen, white blood cells to fight infection, platelets to clot wounds. Bone also acts as the body
Article · 5 min read
Animals
Whales and Dolphins
oxygen. A single great whale carries about 30 tonnes of carbon to the seabed when it dies
Article · 4 min read
Life & Biology
Ecosystems and Food Webs
oxygen; wetlands clean the water; insects pollinate three quarters of our crops; soil organisms grow the food
Article · 4 min read
Matter, Energy & Physics
Atoms
oxygen; 26, iron; 79, gold; 92, uranium. There are 94 naturally occurring elements and about two dozen
Article · 4 min read
Space & the Universe
Space Exploration
oxygen as well as its fuel, so it can work in the vacuum of space. Getting
Article · 3 min read
