Question

1. dust, smoke, sea spray (salt) and other chemicals are examples of , which exist in our air.

Explanation:

In the context of air composition, dust, smoke, sea spray (salt), and other chemicals suspended in the air are known as "particulates" or "air pollutants" (specifically particulate matter). These are solid or liquid particles dispersed in the gaseous air. The term that fits here, based on atmospheric science concepts, is "particulates" (or "particulate matter").

Answer:

particulates (or "particulate matter")