oxygen

Definition:
1. A chemical element. Oxygen is a gas that is present in air and water and is necessary for people, animals and plants to live.
2. A nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust.

Use 'oxygen' in a sentence:

1. Water contains hydrogen and oxygen.
2. Water can be resolved [ decomposed] into hydrogen and oxygen.
3. The higher one climbs, the less oxygen there is in the air.
4. Water is composed of hydrogen and oxygen.
5. Supplementary oxygen is rarely needed in pressurized aircraft.
6. It is 2,300 metres above sea level, so a given volume of air contains only about one-third as much oxygen as it would at sea level.
7. Oxygen has high reactivity.
8. Several chemicals have displaced the oxygen.
9. Fish take in oxygen through their gills.
10. Water can be resolved [decomposed] into hydrogen and oxygen.
11. Atoms of iron in the nail combine with atoms of oxygen from the air to form molecules of iron oxide, or rust.
12. A molecule of water is formed by combining two atoms of hydrogen and one atom of oxygen.
13. Hydrogen combines with oxygen to form water.
14. Without oxygen, the brain is damaged quickly.
15. Rain-soaked soil contains less oxygen than does drier soil.
16. He is only 9 years old, but he knows that hydrogen and oxygen combine to form water.
17. The drug increases the number of red cells in the blood, enhancing oxygen uptake by 10 percent.
18. A drop in oxygen pressure can cause headaches in certain individuals.
19. All life depends ultimately on oxygen.
20. Water is a compound containing the elements of hydrogen and oxygen.
21. Water is a compound containing the elements hydrogen and oxygen.
22. Iron oxide is a compound of iron and oxygen.
23. A molecule of water consists of two atoms of hydrogen and one atom of oxygen.
24. He had the presence of mind to put his emergency oxygen tube in his mouth.
25. She was muzzled with an oxygen mask and tethered to an IV.
26. All the cells and tissues in the body benefit from the increased intake of oxygen.
27. You breathe less when you sleep, so you get less oxygen.
28. Smoking and drinking interfere with your body's ability to process oxygen.
29. Two atoms of hydrogen combine with one atom of oxygen to form a molecule of water.
30. Hydrogen and oxygen combine to form water.
31. Blood is the medium in which oxygen is carried to all parts of the body.
32. The human brain needs to be without oxygen for only four minutes before permanent damage occurs.
33. If headaches only occur at night, lack of fresh air and oxygen is often the cause.
34. Burning fossil fuels uses oxygen and produces carbon dioxide.
35. Carbon, hydrogen and oxygen combine chemically to form carbohydrates and fats.
36. Humans take in oxygen and breathe out carbon dioxide.
37. Ozone is a highly reactive form of oxygen gas.
38. Ozone is produced by the reaction between oxygen and ultraviolet light.
39. If all the coronary arteries are free of significant obstructions, all parts of the heart will receive equal amounts of oxygen.
40. There is little oxygen at high altitudes.
41. Plants absorb oxygen.
42. A stroke can disrupt the supply of oxygen to the brain.
43. A lack of oxygen may inhibit brain development in the unborn child.
44. The brain requires a constant supply of oxygen.
45. Plants and trees filter carbon dioxide out of the air and produce oxygen.