On the heels of a time change and the U.S. presidential election, today's show centers on the science of sleep. We're discussing how it affects our bodies, what we can do to optimize conditions for better rest, what the possible reasons are for "sleep inertia," and what different types of noise may help some people drift off. Plus: a sleep study involving octopuses and whether they can dream as we do.

This news quiz covers topics featured throughout the week on The World from A to Z:

1. On Sunday morning, most of the United States “fell back” from daylight-saving time to what other civil time?

2. True or False: The U.S. Constitution set Election Day as the first Tuesday after the first Monday in November.

3. The Balearic Sea (or Iberian Sea) is off the east coast of what nation, which was recently struck by disastrous flooding in and around the community of Valencia?

4. How many voting seats in the U.S. House of Representatives were up for election this week?

5. What type of rare coin, which was missing an “s” on its head side, recently sold for more than $506,000?

6. Following Tuesday’s vote, what political party is projected to take control of the U.S. Senate in January with at least 52 seats in the chamber?

7. What political party currently controls the U.S. Senate with a majority of 51 seats (including the Independents who typically vote with this party)?

8. Only two U.S. presidents, including Donald Trump (who won re-election on Tuesday), have been elected to non-consecutive terms. Name the other leader who did this.

9. The presidential election between Republican George W. Bush and Democrat Al Gore, which was associated with a historic recount in Florida, occurred in what year?

10. What two-word term, a synonym for morning grogginess, was used in Friday’s show to describe a leftover sleepiness that can affect memory, mood and reaction time as you wake up?