NSF Science Now 11

The video discusses various scientific studies. It begins with research on the Greenland ice cap, highlighting the role of low-lying clouds in melting. Next, it covers a study from Rice University on the decrease of ground-level ozone in American cities, noting that current models may be too conservative. The video then shifts to research from Ohio State University, which finds that older adults make better decisions when in a good mood. Finally, it explores long-term droughts in the southwestern US, attributed to a lack of seasonal rains, as studied by the University of Arizona.

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

• They reflect sunlight away from the surface.

• They cause more snowfall on the ice cap.

• They increase the ice cap's thickness.

• They trap heat near the surface while allowing sunlight to pass through.

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

• Ozone levels have only decreased in rural areas.

• Ozone levels have remained constant.

• Ozone levels have decreased faster than expected.

• Ozone levels have increased significantly.

According to the NSF-funded study, what was a limitation of the model used to predict ozone changes?

• It was too conservative.

• It was too complex.

• It was too optimistic.

• It was too simplistic.

How does being in a good mood affect older adults, according to Ohio State University research?

• It decreases their decision-making abilities.

• It has no effect on their cognitive functions.

• It improves their decision-making and learning speed.

• It makes them more forgetful.

What does the University of Arizona's research suggest about long-term droughts in the southwestern U.S.?

• They are caused by volcanic activity.

• They are unrelated to precipitation patterns.

• They are due to a lack of both summer and winter rains.

• They are caused by excessive rainfall.