Mariana Trench Quiz Questions for 12-Year-Old Students

Instructions

Read each question carefully and answer to the best of your ability. The Mariana Trench is a fascinating and extreme environment. Let's see what you know about the deepest place on Earth!

Part 1: Multiple Choice

Circle the best answer for each question.

1. In which ocean is the Mariana Trench located?

   A) Atlantic Ocean
   B) Indian Ocean
   C) Pacific Ocean
   D) Arctic Ocean

2. What is the name of the deepest known point within the Mariana Trench?

   A) The Hadal Hole
   B) Challenger Deep
   C) The Mariana Pit
   D) Explorer's End

3. The water pressure at the bottom of the trench is immense. It is over 1,000 times the pressure we feel at sea level. This is like having...

   A) a bicycle resting on your fingertip.
   B) a school bus resting on your fingertip.
   C) 100 elephants resting on your head.
   D) a feather resting on your fingertip.

4. Many creatures living in the pitch-black darkness of the trench have a special adaptation to produce their own light. What is this called?

   A) Photosynthesis
   B) Chemosynthesis
   C) Echolocation
   D) Bioluminescence

Part 2: True or False

Read each statement. Write 'T' for True or 'F' for False on the line provided.

1. ____ The Mariana Trench was formed when two continental tectonic plates pulled apart.
2. ____ The water temperature at the bottom of the trench is near boiling because of underwater volcanoes.
3. ____ The first two humans to ever travel to the Challenger Deep were Don Walsh and Jacques Piccard in 1960.
4. ____ Scientists have discovered that no life can exist at the very bottom of the trench due to the pressure.

Part 3: Fill in the Blanks

Complete the sentences below using the words from the word bank.

1. The trench was created by the subduction of one _______________ plate beneath another.
2. The extreme environment of the ocean's deepest trenches is known as the _______________ zone, named after the Greek god of the underworld.
3. The famous filmmaker _______________ _______________ completed a record-breaking solo dive to the bottom of the trench in 2012.
4. Animals in the trench must be adapted to survive extreme cold, total _______________, and crushing _______________.

Answer Key

Part 1: Multiple Choice

1. C) Pacific Ocean
2. B) Challenger Deep
3. C) 100 elephants resting on your head. (This is a common analogy used to describe the immense pressure).
4. D) Bioluminescence

Part 2: True or False

1. F (False. It was formed when one oceanic plate, the Pacific Plate, slid beneath another, the Mariana Plate).
2. F (False. The water temperature is just above freezing, between 1 to 4 degrees Celsius / 34 to 39 degrees Fahrenheit).
3. T (True. They made the journey in the bathyscaphe Trieste).
4. F (False. Scientists have found life, including microorganisms, amphipods like the Mariana Snailfish, and other creatures).

Part 3: Fill in the Blanks

1. tectonic
2. hadal
3. James Cameron
4. darkness, pressure (or pressure, darkness)