Ocean and Natural Phenomena Quiz

What was the name of the British ship that first measured the depths of the Mariana Trench?

• HMS Beagle

• HMS Endeavour

• HMS Challenger

• HMS Victory

How deep is the Challenger Deep, the deepest known point in the ocean?

• 35,856 feet

• 12,000 feet

• 21,180 feet

• 27,500 feet

What percentage of the Earth's surface is covered by water?

• 80%

• 71%

• 60%

• 50%

What would happen to Earth's climate if the oceans disappeared?

• The poles would become tropical

• The equator would freeze

• The entire planet would become a desert

• The equator would overheat and the poles would freeze

What is the primary reason oceans are salty?

• Evaporation of water

• Dissolution of minerals from the sea floor

• Pollution

• Presence of marine life

Why are some lakes, like the Dead Sea, saltier than the ocean?

• They have no outlets for water to escape

• They are closer to the equator

• They have more marine life

• They are deeper than the ocean

What natural process is responsible for the formation of sand?

• Tidal waves

• Earthquakes

• Erosion

• Volcanic eruptions

What gives pink sand beaches their distinctive color?

• Forminifera with red shells

• Basalt rocks

• Coral reefs

• Iron oxide

Why are hurricanes given names?

• To honor meteorologists

• To differentiate them from other storms

• To commemorate historical events

• To make tracking and identification easier

What is the minimum wind speed for a storm to be classified as a hurricane?

• 100 miles per hour

• 157 miles per hour

• 74 miles per hour

• 50 miles per hour