Mysterious Oceans

The sea creature known as a giant tube worm can grow to be of what size?

• over 8 feet (2.4 meters) long
• up to 3 feet (0.9 meters) long
• around 10 feet (3 meters) long
• less than 5 feet (1.5 meters) long

The deep oceans , in contrast to shallow waters covers almost------ of the earths surface.

• one quarter

• two-thirds

• one half

• three quarters

The ocean"s floor is varied , consisting of

• vast plains

• steep canyons

• towering mountains

• coral reefs

Dormant means?

• Active or in motion
• Awake and alert
• Busy or occupied
• Inactive or in a state of rest.

The undersea world is a harsh environment because of its FRIGID temperature and lack of sunshine. Define the word frigid as it is used in this context.

• extremely cold
• slightly cool
• extremely dry
• mildly warm

Do any of them cashe food the way land animals do ? What is the meaning of the word CACHE in this context ?

• No, they do not cache food at all.
• Only some land animals cache food, not others.
• They cache food differently than land animals.
• Yes, some animals cache food like land animals do. They hide a collection of food for later use .

The Marianna Trench is located under a -------

• an udersea cayon

• mountain top

• forest and river trails

• desert

Appréciez-vous la leçon vidéo ?

• Oui

• Non

Few creatures can survive the deep ocean waters .What food sources are found to exist at the bottom of the deep ocean?

• Fish and crustaceans
• Coral and seaweed
• Dead plants and animals .

• Plankton and algae

Deepsea starfish are preditors that actively forage for food . What is the meaning of forage in this context?

• To search for and gather food actively.
• To eat food without searching.
• To store food for later use.
• To avoid food and stay inactive.