Science Now Ep. 11

The video discusses various scientific studies. It begins with a study on the Greenland ice cap, highlighting the role of low-lying clouds in melting. Next, it covers a Rice University study on the decrease of ground-level ozone in American cities and the need for more accurate predictive models. The video then explores research from Ohio State University showing that older adults make better decisions when in a good mood. Finally, it presents findings from the University of Arizona on long-term droughts in the southwestern US, linked to a lack of seasonal rains.

What role do low-lying clouds play in affecting the Greenland ice cap?

• They reflect the Sun's rays back into space.

• They allow the Sun's rays to pass through and trap heat.

• They block the Sun's rays completely.

• They have no effect on the ice cap.

What did the study from Rice University find about ground-level ozone in American cities?

• Ozone levels have remained constant.

• Ozone levels have decreased faster than expected.

• Ozone levels have no impact on air quality.

• Ozone levels have increased significantly.

How do older adults perform in decision-making when they are in a good mood?

• They make worse decisions.

• Their decision-making ability is unaffected.

• They make better decisions and learn faster.

• They become indecisive.

What is the main cause of long-term droughts in the southwestern U.S. according to the University of Arizona study?

• High humidity levels throughout the year.

• A lack of both winter and summer rains.

• Excessive rainfall during winter.

• Increased snowfall in the region.

What method did researchers use to piece together a 470-year climate history in the southwestern U.S.?

• Ocean temperature records.

• Satellite imagery.

• Weather station data.

• Tree ring archives.