La ciencia del cambio climático | Video HHMI BioInteractive

Which of the following extreme weather events are mentioned as becoming more frequent and intense globally?

• Earthquakes and tsunamis

• Hurricanes, droughts, floods, and wildfires

• Volcanic eruptions and blizzards

• Asteroid impacts and solar flares

What factor is identified as contributing to the explosive growth of mega-fires in forests?

• Increased lightning strikes

• Abundant dead wood resulting from multi-year droughts

• Human-caused arson

• Volcanic ash in the atmosphere

What has been the approximate change in global average temperature since the 1880s, according to scientific monitoring?

• A decrease of 0.5°C

• No significant change

• An increase of approximately 1°C

• Fluctuations without a clear trend

Which of the following is NOT one of the three primary factors that control Earth's temperature?

• Intensity of solar radiation

• Composition of Earth's atmosphere

• Reflectivity of the ground surface (albedo)

• Earth's magnetic field strength

What primarily causes the observed seasonal fluctuations in atmospheric carbon dioxide concentrations?

• Changes in ocean absorption rates

• Seasonal cycles of plant photosynthesis and respiration

• Variations in volcanic activity

• Annual industrial emissions

What overall trend has been observed in atmospheric carbon dioxide concentrations from the late 1950s to the present day?

• A steady decrease in CO2 levels

• A significant and continuous increase in CO2 levels

• Stable CO2 levels with only minor, short-term fluctuations

• Erratic and unpredictable changes in CO2 concentrations

How do scientists analyze ice cores to determine past atmospheric conditions, specifically the concentration of greenhouse gases?

• By measuring the density and thickness of the ice layers.

• By studying the types of microorganisms preserved within the ice.

• By extracting and analyzing the ancient air bubbles trapped within the ice.

• By observing the color and clarity of the ice.

Based on the global record of carbon dioxide and temperature over the past 800,000 years, what relationship exists between these two factors?

• They are inversely related; as one increases, the other decreases.

• There is no consistent relationship between them.

• They are directly and closely related; changes in one correspond to changes in the other.

• Temperature changes always precede CO2 changes by several millennia.

What distinguishes Carbon-12 from Carbon-13?

• The number of protons

• The number of electrons

• The number of neutrons

• Their atomic number

Which carbon isotope do plants preferentially absorb for photosynthesis?

• Carbon-14

• Carbon-13

• Carbon-12

• Carbon-11