This Friday, we're featuring a quick update on the U.S. presidential race, and we're quizzing you about the Constitution and the history of social media. In addition, we're reporting on a "Floating Chef" in Austria, a sand sculpture festival in Denmark, and a diamond discovery in Botswana.

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

1. Name the capital of Belgium, where a “flower carpet” recently adorned a historic square in a tradition that dates back to 1971.

2. Name the U.S. Democratic Party’s nominee for president, who received the support of delegates following President Joe Biden’s announcement that he would leave the race.

3. Name the U.S. Republican Party’s nominee for president, who survived an assassination attempt on July 13th while speaking at a campaign rally in Pennsylvania.

4. Name one of the two countries mentioned in Tuesday’s report about East Africa’s “Great Migration,” when more than 1 million wildebeest and zebras move across the Serengeti.

5. In what European country, which is located in the North Atlantic, are scientists exploring ways to harness the extraordinary amount of energy being released by ongoing volcanic eruptions?

6. What commodity, which is considered by many investors to be a safe bet in uncertain times, hit a record high value this week of more than $2,550 per ounce?

7. The larvae of what kind of insect, which can feed on organic waste, are being used to break down the amount of garbage produced by Colombia?

8. In what West African country, whose capital is Dakar, are so-called “agri-influencers” utilizing social media to help sell their crops?

9. Sodium, potassium and magnesium carry a positive or negative charge and are all examples of what, which can be found in many hydration drinks?

10. What gave the U.S. Congress the power to determine when Election Day is held?