Our Oceans Quiz Sci7

What is the primary reason it's difficult to explore the ocean?

• It's too vast and deep

• It's too cold

• There are too many creatures

• It's too polluted

What percentage of the Earth is covered with water?

• 71%

• 75%

• 80%

• 65%

Why can't a very long snorkel be used for deep diving?

• Fish may block the snorkel opening

• It gets tangled easily

• The air won't travel down due to pressure differences

• The water pressure crushes the snorkel

What does SCUBA stand for?

• Submarine Controlled Underwater Breathing Apparatus

• Self-Contained Underwater Breathing Apparatus

• Surface Controlled Underwater Breathing Apparatus

• Submerged Capsule Underwater Breathing Apparatus

What technology replaced the method of using a weight on a rope to measure ocean depth?

• Satellite imaging

• Sonar

• GPS mapping

• Echo-sounding equipment

What principle is used to measure the depth of the ocean?

• Temperature measurement

• Light reflection

• Echo sounding

• Chemical analysis

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

• 50%

• 80%

• 60%

• 70%

What is the primary challenge faced by organisms living on the deep ocean floor?

• High pressure and low temperature

• Lack of sunlight

• High salinity

• Predation from larger animals

Which vehicle is mentioned as being capable of reaching deep parts of the ocean?

• Poseidon

• Apollo

• Alvin

• Nautilus

What does the remotely operated vehicle 'Jason' do?

• Measures ocean temperature

• Predicts ocean currents

• Collects deep-sea samples

• Tracks marine animals