Question 1: Define the Greenhouse Effect in your own words.

Answer: The Greenhouse Effect is the process by which certain gases in the Earth's atmosphere trap heat from the Sun, warming the planet.

Question 2: List three major greenhouse gases involved in climate change.

Answer: Carbon dioxide (CO₂), Methane (CH₄), Nitrous oxide (N₂O)

Question 3: Explain how increased levels of greenhouse gases contribute to global warming.

Answer: Higher levels of greenhouse gases increase the Earth's atmospheric heat retention by trapping more infrared radiation, leading to a rise in global temperatures.

Question 1: Calculate the increase in energy retained in the atmosphere if the concentration of CO₂ rises from 400 ppm to 450 ppm, assuming a linear relationship where 400 ppm corresponds to 100 units of retained energy.

Answer: Calculate the increase as ((450 - 400) / 400) × 100 = 12.5 units of energy.

Question 1: Describe a simple experimental setup to test how different levels of CO₂ affect temperature increase in a controlled environment.

Answer: Use sealed containers with identical volume and material, introduce varying concentrations of CO₂, and measure the temperature after a fixed period using a thermometer. Control variables include light exposure, initial temperature, and container size.

Question 2: Identify two safety precautions that should be taken when handling greenhouse gases in such experiments.

Answer: Ensure proper ventilation and wear safety goggles to prevent inhalation or contact with gases.

Question 1: A report states that over a decade, atmospheric CO₂ levels increased from 380 ppm to 420 ppm, and global temperature rose by 0.8°C. Explain the possible correlation between these two observations.

Answer: The increase in CO₂ levels likely contributed to the greenhouse effect, trapping more heat and causing the observed rise in global temperature.

Question 1: Discuss the impact of human activities, such as burning fossil fuels, on the levels of greenhouse gases and climate change. Include at least two examples.

Answer: Burning fossil fuels releases large amounts of CO₂ and other greenhouse gases into the atmosphere, increasing the greenhouse effect. Examples include vehicle emissions and power station operations.

Question 2: Multiple Choice: Which of the following is NOT a greenhouse gas?

Answer: Nitrogen (N₂)

Question 3: Fill in the blank: The primary human source of increased CO₂ in the atmosphere is the combustion of __________.

Answer: fossil fuels