1 Flashcards
(26 cards)
What is the carbon cycle?
The carbon cycle is the process by which carbon atoms are exchanged among the Earth’s atmosphere, oceans, soil, and living organisms.
True or False: Carbon is only found in living organisms.
False
What are the main components of the carbon cycle?
The main components include photosynthesis, respiration, decomposition, combustion, and ocean absorption.
Fill in the blank: Plants take in carbon dioxide during __________.
photosynthesis
What process releases carbon dioxide back into the atmosphere?
Respiration and combustion.
Multiple Choice: Which of the following is a major reservoir of carbon? A) Atmosphere B) Oceans C) Soil D) All of the above
D) All of the above
What role do oceans play in the carbon cycle?
Oceans absorb carbon dioxide from the atmosphere and serve as a major carbon sink.
True or False: The carbon cycle is a closed system.
True
What is the significance of carbon sinks?
Carbon sinks are natural systems that absorb more carbon than they release, helping to mitigate climate change.
Fill in the blank: The process of converting organic matter into carbon dioxide and nutrients is called __________.
decomposition
Multiple Choice: Which human activity significantly contributes to the increase of carbon dioxide in the atmosphere? A) Deforestation B) Recycling C) Planting trees D) Water conservation
A) Deforestation
What is the greenhouse effect?
The greenhouse effect is the warming of the Earth’s surface due to the trapping of heat by greenhouse gases like carbon dioxide.
True or False: Carbon can exist in different forms, such as carbon dioxide and organic carbon.
True
What is the role of fossil fuels in the carbon cycle?
Fossil fuels release stored carbon into the atmosphere when burned, contributing to climate change.
Fill in the blank: Carbon is essential for __________, as it forms the backbone of organic molecules.
life
What is photosynthesis?
Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with carbon dioxide and water.
Multiple Choice: Which gas is primarily absorbed by plants during photosynthesis? A) Oxygen B) Nitrogen C) Carbon dioxide D) Methane
C) Carbon dioxide
What impact does deforestation have on the carbon cycle?
Deforestation reduces the number of trees that can absorb carbon dioxide, leading to increased atmospheric CO2 levels.
True or False: The carbon cycle has no influence on climate change.
False
What is the difference between a carbon source and a carbon sink?
A carbon source releases more carbon into the atmosphere than it absorbs, while a carbon sink absorbs more carbon than it releases.
Fill in the blank: The burning of __________ contributes to the increase of carbon dioxide in the atmosphere.
fossil fuels
What is the role of soil in the carbon cycle?
Soil stores carbon in the form of organic matter and contributes to carbon exchange between the atmosphere and living organisms.
Multiple Choice: What process occurs when organisms break down organic material? A) Photosynthesis B) Respiration C) Fermentation D) Decomposition
D) Decomposition
What are greenhouse gases?
Greenhouse gases are gases that trap heat in the atmosphere, including carbon dioxide, methane, and nitrous oxide.
