(Question)
Answer the following question given this paragraph: Nitrogen dioxide is a toxic gas with a sharp odor. It can irritate the eyes and throat and trigger asthma attacks. It is a major air pollutant. Q: What common air pollutant is characterized by its sharp odor and often triggers asthma attacks? Choices: - plant dioxide - pigment dioxide - Carbon Dioxide - nitrogen dioxide A:
(Answer)
nitrogen dioxide

(Question)
Answer the following question given this paragraph: Water also moves through the living organisms in an ecosystem. Plants soak up large amounts of water through their roots. The water then moves up the plant and evaporates from the leaves in a process called transpiration . The process of transpiration, like evaporation, returns water back into the atmosphere. Q: Water moving up the plane and evaporating from the leaves is a process known as what? Choices: - propagation - sublimation - evaporation - transpiration A:
(Answer)
transpiration

(Question)
Answer the following question given this paragraph: The Tyndall effect is the scattering of visible light by colloidal particles. Q: The tyndall effect refers to the scattering of what by colloidal particles? Choices: - primary colors - dark matter - dust mites - visible light A:
(Answer)
visible light