Carbon dioxide is essential for life, but an increase in its concentration can be harmful. Why?, a) It increases oxygen levels too much, b) It reduces rainfall, c) It traps more heat, leading to global warming, d) It blocks all sunlight, Fossil fuels are considered long-term carbon stores because:, a) They are formed quickly and used immediately, b) They keep carbon locked underground for millions of years, c) They absorb carbon dioxide from the air, d) They release oxygen continuously, Which situation best explains how burning fossil fuels disrupts the carbon cycle?, a) Carbon remains stored underground, b) Carbon is removed from the atmosphere, c) Stored carbon is rapidly released into the atmosphere, d) Carbon is converted into oxygen, A scientist says, “Earth would be uninhabitable without greenhouse gases.” Which explanation best supports this statement?, a) Greenhouse gases increase rainfall, b) Greenhouse gases trap heat and prevent extreme cold, c) Greenhouse gases produce oxygen, d) Greenhouse gases block harmful gases, During an ice age, which of the following conditions is most likely?, a) Increased global temperatures, b) Ice limited only to mountains, c) Large areas of Earth covered with ice, d) Continuous rainfall worldwide, How could dust from asteroid collisions in space lead to global cooling on Earth?, a) By increasing oxygen levels, b) By heating the atmosphere, c) By blocking sunlight from reaching Earth, d) By increasing rainfall, Why did the asteroid impact 67 million years ago affect life across the entire planet?, a) Only the impact site was damaged, b) Oceans disappeared completely, c) Earth stopped rotating, d) Dust spread globally, affecting sunlight and temperature, Which sequence correctly shows the effect of reduced sunlight after an asteroid impact?, a) Less photosynthesis → less food → species decline, b) More photosynthesis → more food → population increase, c) Increased rainfall → better crops → population growth, d) Higher temperatures → more biodiversity, A meteor is seen as a bright streak in the sky. Why does it usually disappear before reaching Earth?, a) It dissolves in clouds, b) It changes direction, c) It burns due to friction with the atmosphere, d) It slows down and stops, Why do scientists monitor both the size and distance of asteroids from Earth?, a) Distance does not matter, b) Larger asteroids can cause more damage even if farther away, c) Only small asteroids are dangerous, d) All asteroids are harmless, Earth’s climate has been relatively stable for the past 2000 years. Why is this stability important for humans?, a) It reduces sunlight, b) It increases oxygen levels, c) It prevents earthquakes, d) It allows predictable farming and crop cycles, Which situation best indicates climate change rather than normal weather variation?, a) A long-term increase in average global temperature, b) A rainy day after a sunny week, c) A storm occurring in one region, d) A sudden drop in temperature overnight, Why does an increase in carbon dioxide lead to higher global temperatures?, a) It increases wind speed, b) It traps more heat near Earth’s surface, c) It reflects sunlight away, d) It reduces ocean levels, How can higher global temperatures increase the frequency of extreme weather events?, a) By stopping wind movement, b) By decreasing evaporation, c) By increasing energy in the atmosphere, d) By reducing energy in the atmosphere, Why are coastal cities more vulnerable to rising sea levels?, a) They receive less rainfall, b) They are far from oceans, c) They are located at higher altitudes, d) They are close to sea level and prone to flooding

Climate Change

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