Seven Natural Wonders of the World Quiz

An aurora, also know as the polar lights or aurora polaris, is a natural display of coloured light in Earth's sky, usually seen in high-latitude regions around the Arctic and Antarctic. Which of the following statements about the cause of auroras is true?
A.	Auroras are caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky.
B.	Auroras are created when charged particles from the sun strike the upper atmosphere and excite atoms in the atmosphere, which then emit light of varying colour.
C.	Auroras are a result of diffraction of light which occurs when light from the sun bends around the clouds.
D.	Auroras are optical illusions caused by smoke coming from bushfires.

The Grand Canyon is a steep-sided canyon in Arizona, United States. Which of the following rivers is responsible for carving the Grand Canyon?
A.	Mississippi River
B.	Colorado River
C.	The Gulf of Mexico
D.	None. It was carved by sculptors

The Great Barrier Reef is the world's largest coral reef system, located in the Coral Sea, off the coast of Queensland, Australia. In which year was it labelled one of the seven natural wonders of the world by CNN?
A.	1997
B.	2006
C.	1846
D.	2011

Guanabara Bay is an oceanic bay located in Southeast Brazil in the state of Rio de Janeiro. The unique formation of granite mountains surrounding the bay can make the South Atlantic appear like a series of lakes depending on your point of view. Which of the following figures gives the correct area, in square kilometres, of Guanabara Bay?
A.	412 km2
B.	2770 km2
C.	1540 km2
D.	663 km2

Mount Everest is Earth's highest mountain above sea level. Its elevation of 8,848.86 m was most recently established in 2020 by the Chinese and Nepali authorities. Which mountain range is Mount Everest part of?
A.	the Rocky Mountains
B.	the Alps
C.	the Andes
D.	the Himalayas

Parícutin (or Volcán de Parícutin) is a volcano located in the Mexican state of Michoacán, near the city of Uruapan and about 322 kilometers (200 mi) west of Mexico City. What type of volcano is Parícutin?
A.	composite
B.	shield
C.	cinder cone
D.	lava dome

Victoria Falls is a waterfall on the Zambezi River in southern Africa, which provides habitat for several unique species of plants and animals. Which famous explorer is believed to have been the first European to view the Victoria Falls?
A.	Christopher Columbus
B.	Ferdinand Magellan
C.	Marco Polo
D.	David Livingstone