Exploring Earth's Undersea World

Multiple Choice

Why is it important to study the features of the ocean floor?

• To understand marine life and Earth's geology

• To learn about outer space

• To improve weather forecasting

• To find new continents

Multiple Choice

Which vocabulary word describes a small vehicle that can travel deep underwater?

• submersible

• hydrothermal vent

• seamount

• rugged

Open Ended

Explain how seafloor spreading leads to the formation of mid-ocean ridges.

Fill in the Blanks

Hydrothermal vents release mineral-rich water when water seeps into Earth's crust and is heated by

.

Multiple Select

Select all features that are formed as a result of tectonic plate movement.

• Mid-ocean ridges

• Ocean trenches

• Hydrothermal vents

• Seamounts

Multiple Choice

Which of the following is an example of experiencing something firsthand?

• Watching a video about hydrothermal vents

• Reading about ocean trenches in a book

• Diving in a submersible to see a seamount

• Reading about the ocean online

Open Ended

Why is it important to understand the order of adjectives when describing something?

Fill in the Blanks

The root 'rupt' means

or burst.

Multiple Choice

What is the effect when tectonic plates move apart very slowly in the ocean?

• Mountains are formed

• Islands are formed

• Seafloor spreading occurs

• Hydrothermal vents form

Open Ended

Name two technologies scientists use to explore the deep ocean and explain how they help in ocean exploration.

Multiple Choice

Which of the following processes is responsible for the creation of seamounts on the ocean floor?

• Seafloor spreading

• Subduction

• Volcanic activity

• Hydrothermal vents

Multiple Choice

Which of the following is a feature created by seafloor spreading?

• Hydrothermal vent

• Mid-ocean ridge

• Seamount

• Trench