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level: A changing atmosphere

Questions and Answers List

level questions: A changing atmosphere

QuestionAnswer
The process in which plants and algae use light energy to produce glucose and oxygen.Photosynthesis
What is the primary result of photosynthesis in plants and algae?The primary result of photosynthesis is the production of glucose and oxygen.
Primitive plants began producing oxygen approximately 2.7 billion years ago through photosynthesis.Oxygen Evolution
When did primitive plants start producing oxygen through photosynthesis?Primitive plants started producing oxygen around 2.7 billion years ago.
The production of oxygen by plants gradually increased over time.Gradual Increase in Oxygen
How did oxygen levels change over time due to plant evolution?Oxygen levels gradually increased over time as a result of plant evolution.
Increasing oxygen levels eventually allowed for the evolution of animal life.Impact on Animal Evolution
What impact did the increase in oxygen levels have on the evolution of animal life?Increasing oxygen levels played a crucial role in enabling the evolution of animal life.
Algae and plants are organisms that produce oxygen through photosynthesis.Oxygen-Producing Organisms
Name two types of organisms that produce oxygen through photosynthesis.Algae and plants are organisms that produce oxygen through photosynthesis.
Equations representing the process of photosynthesis, where light energy is used to produce glucose.Photosynthesis Equations
The method used to determine the presence of oxygen gas.Chemical Test for Oxygen
What is the chemical test for oxygen gas?The chemical test for oxygen gas involves placing a glowing splint in the test tube of gas.
The specific test using a glowing splint to detect the presence of oxygen.Glowing Splint Test
How is the presence of oxygen detected in the glowing splint test?If oxygen is present, the glowing splint will relight.
If oxygen is present, the extinguished glowing splint will reignite.Relighting of Splint
What happens to the glowing splint if oxygen is present during the test?The extinguished glowing splint will relight in the presence of oxygen.
A result indicating the presence of oxygen in the tested gas.Positive Result
What does a relighting splint indicate in terms of the test result?A relighting splint is a positive result, indicating the presence of oxygen.
The apparatus used for conducting the chemical test for oxygen.Test Tube Setup
What is the setup for the chemical test for oxygen, and what is placed in the test tube?The test tube setup involves placing a glowing splint in the test tube of gas to test for oxygen.
Oxygen (O2) is a colorless, odorless gas vital for various biological processes.Oxygen Gas
What gas is specifically being tested for in the chemical test with the glowing splint?The chemical test is specifically designed to detect the presence of oxygen gas (O2).
How does photosynthesis contribute to reducing carbon dioxide levels?Photosynthesis increases as plants and algae grow, leading to a decrease in carbon dioxide levels.
Organic compounds, such as crude oil and natural gas, formed from the remains of dead plants and algae over millions of years.Fossil Fuels
How do fossil fuels contribute to reducing carbon dioxide levels?Dead algae and plants turn into fossil fuels, trapping carbon and aiding in the reduction of atmospheric carbon dioxide.
The process of capturing and storing carbon to prevent it from entering the atmosphere.Carbon Sequestration
What is carbon sequestration, and how does it help reduce carbon dioxide levels?Carbon sequestration involves trapping carbon, such as in fossil fuels, preventing its release into the atmosphere and reducing carbon dioxide levels.
The process where carbon dioxide dissolves in the oceans.Ocean Dissolution
How does the dissolution of carbon dioxide in the oceans contribute to reducing atmospheric carbon dioxide?Carbon dioxide dissolves in the oceans, reducing its concentration in the atmosphere.
Compounds formed when carbon dioxide in the oceans combines with minerals, precipitating as sedimentary rocks like limestone.Carbonates and Sedimentary Rocks
How do carbonates and sedimentary rocks contribute to decreasing carbon dioxide levels?Carbon dioxide in the oceans forms carbonates, which can precipitate as sedimentary rocks, further reducing carbon dioxide levels.
The process by which dissolved carbonates come together and settle out of the water, forming solid deposits.Precipitation of Carbonates
What role does the precipitation of carbonates play in reducing atmospheric carbon dioxide?Precipitation of carbonates from the oceans contributes to the reduction of carbon dioxide levels in the atmosphere.