#1
Which gas makes up the majority of Earth's atmosphere?
Oxygen
Nitrogen
Carbon Dioxide
Argon
#2
What is the layer of the atmosphere closest to the Earth's surface called?
Exosphere
Stratosphere
Troposphere
Mesosphere
#3
Which layer of the atmosphere contains the ozone layer?
Troposphere
Stratosphere
Mesosphere
Thermosphere
#4
Which gas is most responsible for the greenhouse effect?
Oxygen
Carbon dioxide
Nitrogen
Water vapor
#5
Which layer of the atmosphere is known for containing the ozone layer?
Mesosphere
Troposphere
Stratosphere
Exosphere
#6
Which of the following is not a greenhouse gas?
Carbon dioxide
Methane
Nitrogen
Water vapor
#7
Which of the following gases is considered a greenhouse gas?
Oxygen
Nitrogen
Methane
Argon
#8
What causes the phenomenon known as the aurora borealis or the northern lights?
Solar wind interacting with Earth's magnetic field
Volcanic eruptions
Lightning strikes
Oil spills
#9
What is the ozone layer primarily responsible for?
Absorbing ultraviolet (UV) radiation from the sun
Regulating the Earth's temperature
Producing oxygen for respiration
Creating the greenhouse effect
#10
What is the average composition of the Earth's atmosphere?
78% nitrogen, 21% oxygen, 1% other gases
50% nitrogen, 50% oxygen
90% nitrogen, 10% oxygen
100% oxygen
#11
Which layer of the atmosphere is characterized by a decrease in temperature with increasing altitude?
Troposphere
Stratosphere
Mesosphere
Thermosphere
#12
What is the main reason why the sky appears blue?
Reflection of the ocean
Absorption of blue light by air molecules
Scattering of sunlight by air molecules
Presence of blue clouds
#13
Which of the following is not a primary layer of the Earth's atmosphere?
Stratosphere
Thermosphere
Ionosphere
Troposphere
#14
What is the primary source of oxygen in the Earth's atmosphere?
Photosynthesis
Volcanic eruptions
Respiration
Decomposition of organic matter
#15
Which layer of the atmosphere is characterized by a high concentration of charged particles and is important for radio communication?
Stratosphere
Mesosphere
Thermosphere
Exosphere
#16
What is the primary role of the ionosphere in the Earth's atmosphere?
Absorbing harmful UV radiation
Reflecting radio waves
Producing ozone
Regulating the Earth's temperature
#17
Which phenomenon is responsible for the formation of the ozone hole?
Volcanic eruptions
Industrial pollution
Release of CFCs (chlorofluorocarbons)
Deforestation
#18
What is the role of the mesosphere in protecting the Earth?
It filters out harmful UV radiation
It reflects solar wind
It burns up most meteoroids
It traps greenhouse gases