Electric Blue Sunsets Quiz

What are noctilucent clouds primarily composed of?

• Water vapor

• Tiny ice crystals

• Dust particles

• Carbon dioxide

When were the first recorded observations of noctilucent clouds made?

• In the 18th century

• In the 19th century

• In the 20th century

• In the 21st century

What event was initially thought to have caused noctilucent clouds?

• The eruption of Krakatoa

• The eruption of Vesuvius

• The eruption of Mauna Loa

• The eruption of Mount St. Helens

How does carbon dioxide affect the mesosphere?

• It warms the mesosphere

• It cools the mesosphere

• It has no effect on the mesosphere

• It increases the pressure in the mesosphere

What happens to methane as it rises in the atmosphere?

• It turns into carbon dioxide

• It oxidizes into water

• It forms ozone

• It remains unchanged