Oxygen-6th Grade_Brief
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Oxygen is a colorless, odorless gas that is essential for sustaining most terrestrial life. It has the chemical symbol O and atomic number 8. Oxygen is highly reactive and capable of combining with most other elements. It is necessary for respiration in plants and animals and is produced through photosynthesis in plants. Oxygen exists as a diatomic molecule made of two oxygen atoms bonded together.
Oxygen-6th Grade_Brief
- 2. Oxygen is a chemical element with symbol ’O’ and atomic number ’8’. Oxygen is an important part of the atmosphere, and is necessary to sustain most terrestrial life as it is used in respiration. Discovered in 1774.
- 3. Oxygen is a colorless, odorless gas with the molecular formula O2, in which the two oxygen atoms are chemically bonded to each other. An Oxygen Molecule
- 5. heavier than air soluble in water without smell or taste the gas is colourless, odourless and tasteless liquid O2 and solid O2 have a light blue color very reactive
- 6. Melting point : -218.8 °C ( turns from solid to liquid ) Solidified O2 Freezing point: Below -218.8 °C ( turns from liquid to solid ) Liquid O2 Boiling point: -182.962 ° C ( turns from liquid to gas )
- 7. Oxygen is very reactive and capable of combining with most other elements. It is essential for the respiration of all plants and animals and for almost all combustion. This gas is used in various industrial chemical applications. It is used to make acids, sulfuric acid, nitric acid and other compounds.
- 8. Approximately 2/3 of the mass of the human body is oxygen. Oxygen is a combination of two Greek words: ’oxys’, meaning ‘acid’, and ’genes’, meaning ‘forming’. The atmosphere of Mars contains about 0.15 percent oxygen. Nearly half of the mass of Earth's crust is made up of oxygen.
- 9. The oxygen cycle describes the movement of oxygen within its three main reservoirs: 1. the atmosphere 2.the biosphere 3.the lithosphere.
- 10. Plants mark the beginning of the oxygen cycle. Plants are able to make ‘oxygen’ for us by the process known as photosynthesis. Animals form the other half of the oxygen cycle. We breathe in oxygen which we process call respiration.