The air that you breathe is a gas.List other gases that you have heard about in a science class.

I don't remember being in that class. What is in your notes?

In a science class, you may have heard about various gases apart from the air we breathe. Some common ones include:

1. Oxygen (O2): This is the most abundant gas in the Earth's atmosphere and is essential for the process of respiration.

2. Carbon Dioxide (CO2): It is a greenhouse gas and a byproduct of many natural and human activities, such as combustion and cellular respiration.

3. Nitrogen (N2): Nitrogen is another major component of Earth's atmosphere. It is mainly inert and does not readily react with other substances.

4. Hydrogen (H2): Hydrogen is the lightest and most abundant element in the universe. It is highly flammable and used as a fuel source and in various industrial processes.

5. Methane (CH4): Methane is a potent greenhouse gas and is emitted during the decay of organic matter, as well as from livestock and natural gas production.

6. Ozone (O3): Ozone is a gas composed of three oxygen atoms bonded together. It exists in the Earth's atmosphere and plays a crucial role in protecting us from harmful ultraviolet (UV) radiation.

7. Helium (He): Helium is an inert gas that is lighter than air. It is commonly used in balloons, as well as for cooling purposes in various scientific and medical applications.

These are just a few examples of gases you might have come across in a science class. There are many more gases that scientists study and explore based on their properties and interactions with other substances.