Evolution On The Earths Atmosphere Flashcards
(15 cards)
What was the composition of the Earth’s early atmosphere?
The early atmosphere was primarily composed of carbon dioxide, water vapor, ammonia, and methane.
True or False: The Earth’s atmosphere has always contained oxygen.
False
Which process led to the increase of oxygen in the atmosphere?
Photosynthesis by early plants and cyanobacteria.
Fill in the blank: The Great Oxidation Event occurred approximately _____ billion years ago.
2.4
What gas was produced as a byproduct of photosynthesis?
Oxygen
What role did volcanic activity play in the evolution of the atmosphere?
Volcanic activity released gases such as carbon dioxide and water vapor, contributing to the early atmosphere.
Multiple choice: Which gas is not a primary component of the current Earth’s atmosphere? A) Nitrogen B) Oxygen C) Carbon Dioxide D) Methane
D) Methane
What effect did the formation of the ozone layer have on life on Earth?
It protected life from harmful ultraviolet radiation, allowing organisms to thrive on land.
Which human activities are currently affecting the composition of the atmosphere?
Burning fossil fuels and deforestation.
True or False: The percentage of oxygen in the atmosphere has remained constant over geological time.
False
What is the primary source of carbon dioxide in the current atmosphere?
Human activities, particularly the combustion of fossil fuels.
Fill in the blank: The current atmosphere is approximately _____% nitrogen.
78
What is one consequence of increased greenhouse gases in the atmosphere?
Global warming and climate change.
Short answer: Name one natural process that removes carbon dioxide from the atmosphere.
Photosynthesis.
Multiple choice: Which of the following contributes to acid rain? A) Sulfur dioxide B) Oxygen C) Nitrogen D) Argon
A) Sulfur dioxide
