Greenhouse Gases and Ozone Layer

When we discuss greenhouse gases what is the main one we discuss?

• Methane (CH₄)
• Carbon Dioxide (CO₂)
• Nitrous oxide (N₂O)
• Flourinated gases

The main human activity that releases greenhouse gases is...

• using bottled water
• burning fossil fuels
• texting on cellphones
• eating meat

T/F: Water vapor is a greenhouse gas

• True
• False

T/F: Some greenhouse gases are naturally present in the Earth's atmosphere

• True
• False

The warming of the atmosphere by the trapping of heat being radiated to space is called

• evaporation
• condensation
• the greenhouse effect
• radiation

Without any greenhouse effect the Earth would be...

• Fine
• Too Cold to Support Life
• Very Hot

What are the two most common greenhouse gases?

• Water Vapor (H₂O) and Methane (CH₄)
• Carbon Dioxide CO₂ and Methane (CH₄)
• Water Vapor (H₂O) and Carbon Dioxide CO₂
• Water Vapor (H₂O) and Nitrous oxide (N₂O)

Over the past 200 years, the level of carbon dioxide in the atmosphere has

• decreased slightly.   
• increased until recently, and then decreased.
• increased steadily.   
• stayed about the same.

T/F: Earth Naturally goes through periods of warm and cold

• True
• False

Which layer in the atmosphere protects us form harmful UV radiation?

• Ozone
• Troposphere
• Ionosphere
• Exosphere