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 and is a highly reactive nonmetallic element. It is an essential component of air, water, and most living organisms.

Properties of Oxygen

Physical State: Oxygen is a colorless, odorless gas at room temperature and pressure.
Reactivity: It readily forms compounds with most other elements, especially metals.
Boiling Point: -183 degrees Celsius
Freezing Point: -219 degrees Celsius
Density: 1.429 g/L

Role in Living Organisms

Oxygen is essential for the process of respiration in most living organisms. It is used to produce energy through the process of cellular respiration, which takes place in the mitochondria of cells. Oxygen is also a key component of DNA, proteins, and other essential molecules in the body.

Study Guide

What is the atomic number of oxygen?
Describe the physical state of oxygen at room temperature and pressure.
Explain the role of oxygen in the process of respiration.
Discuss the reactivity of oxygen with other elements.
What is the density of oxygen gas?

Feel free to use this study guide to test your knowledge of the topic "oxygen"! Good luck with your studies!

◂Science Worksheets and Study Guides Eighth Grade. Our Solar System

The resources above cover the following skills:

Earth/Space Science: Students will use scientific skills and processes to explain the chemical and physical interactions (i.e., natural forces and cycles, transfer of energy) of the environment, Earth, and the universe that occur over time.

Astronomy: Identify and describe the components of the universe.

Identify that our solar system is a component of the Milky Way Galaxy.

Astronomy: Identify and explain celestial phenomena using the regular and predictable motion of objects in the solar system.

Identify and describe how the shape and location of the orbits of asteroids and comets affect their periods of revolution.