Summer smog is also known as photochemical smog. It is created when sunlight mixes with hydrocarbons and nitrogen oxides in the
atmosphere. The result is a chemical change in the atmosphere that leads to smog formation, which can be of health concern. Lung
irritation and exacerbation of respiratory illness is common during smog events. What component of photochemical smog likely
contributes to the lung irritation?
A)ozone
B)methane
C)nitric acid
D)carbon dioxide

The image shows a sandstone formation with visible bands of different colors. what do the bands indicate about how this sedimentary rock was formed? choose two answers. a). the rock was made from more than one material. b). water was absent during the compaction and cementation process. c). sediments and other matter were deposited in layers before lithification. d). the rock was stretched horizontally by the pressure from surrounding rocks. e). layers of hot liquid in the rocks cooled and solidified at different tempatures