How many main layers does Earth's atmosphere have?

• 5
• 4
• 3
• 6

What is found in the exosphere?

• Dense air and weather systems

• Satellites and space stations

• Ozone molecules

• Meteors burning up

Which phenomenon occurs in the thermosphere?

• Weather formation

• Meteors burning up

• Ozone layer depletion

• Auroras (Northern and Southern Lights)

Which layer is the coldest in the atmosphere?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

What is the primary function of the ozone layer?

• To absorb harmful ultraviolet (UV) radiation

• To burn up meteors

• To trap heat and warm the Earth

• To create weather patterns

Which of the following occurs in the troposphere?

• Formation of auroras

• Weather phenomena

• Ozone layer absorption of UV rays

• Satellites orbit

Which layer of the atmosphere is closest to Earth's surface?

• Stratosphere
• Mesosphere
• Thermosphere
• Troposphere

In which layer of the atmosphere do commercial airplanes typically fly?

• Thermosphere
• Stratosphere
• Mesosphere
• Troposphere

What happens to meteors in the mesosphere?

• They orbit Earth

• They burn up due to friction

• They create auroras

• They reflect radio waves

Which elemental gas makes up around 78% of the Earth's atmosphere?

• Carbon Dioxide
• Hydrogen
• Nitrogen
• Oxygen