What are primary and secondary aerosols?

Aerosols are tiny particles floating in the air, some come from the ground, and others are made in the sky.

Primary aerosols are like tiny rocks or dust that you can pick up from the ground. Imagine you're playing outside, and you kick up dirt from the sandbox, that dirt is primary aerosol. It was already there, and now it’s flying in the air because of your foot! Examples include sand, pollen, and even tiny pieces of soot from a fire.

Secondary aerosols are like tiny cookies baked in the sky. They start as something else, like gas or vapor, and then change into solid or liquid particles. It's like when you put dough in the oven, and it turns into a cookie. In the air, gases can mix together and form new tiny particles. For example, car exhaust starts as invisible gas, but over time it can turn into tiny smoke particles that float around, those are secondary aerosols.

So, primary aerosols come from the ground, and secondary aerosols are made in the sky, both help make the air we breathe a little more interesting! Aerosols are tiny particles floating in the air, some come from the ground, and others are made in the sky.

Primary aerosols are like tiny rocks or dust that you can pick up from the ground. Imagine you're playing outside, and you kick up dirt from the sandbox, that dirt is primary aerosol. It was already there, and now it’s flying in the air because of your foot! Examples include sand, pollen, and even tiny pieces of soot from a fire.

Secondary aerosols are like tiny cookies baked in the sky. They start as something else, like gas or vapor, and then change into solid or liquid particles. It's like when you put dough in the oven, and it turns into a cookie. In the air, gases can mix together and form new tiny particles. For example, car exhaust starts as invisible gas, but over time it can turn into tiny smoke particles that float around, those are secondary aerosols.

So, primary aerosols come from the ground, and secondary aerosols are made in the sky, both help make the air we breathe a little more interesting!