| 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. |
