Environmental Chemistry: Atmosphere and Water - SS2 Chemistry Past Questions and Answers - page 1
Which of the following gases is the most abundant in Earth's atmosphere?
Oxygen (O2)
Nitrogen (N2)
Carbon dioxide (CO2)
Argon (Ar)
Approximately what percentage of Earth's atmosphere is composed of oxygen?
21%
28%
78%
0.04%
Which layer of the atmosphere is characterised by a decrease in temperature with increasing altitude?
Troposphere
Stratosphere
Mesosphere
Thermosphere
The ozone layer is located in which layer of the atmosphere?
Troposphere
Stratosphere
Mesosphere
Thermosphere
Which of the following greenhouse gases is primarily responsible for the greenhouse effect?
Oxygen (O2)
Nitrogen (N2)
Carbon dioxide (CO2)
Water vapour (H2O)
Which layer of the atmosphere is characterised by the presence of the auroras (Northern and Southern Lights)?
Troposphere
Stratosphere
Mesosphere
Thermosphere
The ozone layer plays a crucial role in:
Absorbing ultraviolet (UV) radiation from the Sun
Regulating Earth's temperature
Filtering out visible light
Promoting photosynthesis
Which of the following layers of the atmosphere contains the majority of the Earth's weather phenomena?
Troposphere
Stratosphere
Mesosphere
Thermosphere
The composition of the atmosphere remains relatively constant up to which layer?
Troposphere
Stratosphere
Mesosphere
Thermosphere
Which of the following is not considered a variable component of the atmosphere?
Water vapour (H2O)
Carbon dioxide (CO2)
Nitrogen (N2)
Ozone (O3)