Oxygen
Oxygen is a chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds.
Physical and Chemical Properties of Oxygen
- Physical State: Oxygen is a colorless, odorless gas at room temperature and pressure.
- Boiling Point: -183 °C (-297 °F)
- Melting Point: -218.4 °C (-361.1 °F)
- Density: 0.001429 g/cm3
- Reactivity: Oxygen is highly reactive and supports combustion.
Role of Oxygen in Living Organisms
Oxygen is essential for the survival of living organisms. It is used in the process of cellular respiration, where it serves as the final electron acceptor in the electron transport chain, enabling the production of adenosine triphosphate (ATP), the energy currency of the cell.
Uses of Oxygen
Oxygen has various industrial and medical uses, including in welding, cutting, and brazing processes, as well as in medical applications for patients with respiratory conditions.
Study Guide:
- What is the chemical symbol for oxygen?
- What is the physical state of oxygen at room temperature and pressure?
- Explain the role of oxygen in cellular respiration.
- What are the industrial and medical uses of oxygen?
◂Science Worksheets and Study Guides Sixth Grade. Plate Tectonics
Worksheet/Answer key
Plate Tectonics 
Worksheet/Answer key
Plate Tectonics Worksheet/Answer key
Plate Tectonics Vocabulary/Answer key
Plate Tectonics Vocabulary/Answer key
Plate Tectonics Vocabulary/Answer key
Plate Tectonics Vocabulary/Answer key
Plate Tectonics
Worksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
EARTH AND SPACE SCIENCE
Earth’s Systems
Use evidence to explain how different geologic processes shape Earth’s history over widely varying scales of space and time (e.g., chemical and physical erosion; tectonic plate processes; volcanic eruptions; meteor impacts; regional geographical features, including Alabama fault lines, Rickwood Caverns, and Wetumpka Impact Crater).
Provide evidence from data of the distribution of fossils and rocks, continental shapes, and seafloor structures to explain past plate motions.
Use models to explain how the flow of Earth’s internal energy drives a cycling of matter between Earth’s surface and deep interior causing plate movements (e.g., mid-ocean ridges, ocean trenches, volcanoes, earthquakes, mountains, rift valleys, volcanic islands).