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AIR QUALITY

C2

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Across
2.Predict in advance
6.Small hair-like structures that line the airways in the lungs and help clean out the airways.
7.Behavior considered good or right.
9.Air pollution that consists of tiny, often microscopic particles of dust, dirt, smoke, and liquid droplets.
11.A color-coded scale that provides daily air quality and health information
14.Harmful substance put into the environment, for example into the air, water, or soil.
15.Not circulating or flowing
16.A representation of a system that allows for investigation of the properties of the system
Down
1.A layer of warm air that pre¬vents the rise of cooler air and pollutants beneath it.Cold air in the atmosphere (and any air pollution in it) is trapped under warmer air above it; this is a reversal of normal conditions, in which temperature decreases as you go higher in the atmosphere
3.Ozone is an air pollutant when near the Earth’s surface. (In contrast, in the Earth’s upper atmosphere, ozone protects people from receiv¬ing too much ultraviolet radiation from the sun
4.A small bit of something, such as dirt or dust
5.Vulnerable or predisposed to who is at risk of getting a disease or illness if exposed to something that causes the disease or illness. certain effects. A member of a population
8.Occurs when too much dirt or too many chemicals get into the air and make it dirty.
10.Something that is not a solid or a liquid. A gas doesn’t have a particular shape, and usually is invis¬ible.
12.Substances discharged into the air. Releases of pollutants from a variety of sources and activities, including vehicles, factories, power plants that make electricity, and wood-burning stoves and fireplaces, among others
13.A gas that occurs both in the Earth’s upper atmosphere and at ground level. Ozone can be “good” or “bad” for people’s health and the environment, depending on its location in the atmosphere

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