Duplicate of BJU Earth Science Chapter 15 5th ed.

Photocells are more accurate and more widely used than Secchi disks today.

Satellite radars can detect only large changes in sea level.

A plankton net is used to scrape sediments and specimens from the sea floor and bring them to the surface.

Which of the following types of data would best be collected by a wide-area sampling method?

Water clarity can be measured at night using __________.

A sounding will reveal the __________ of a body of water.

The best device for determining the shape of a seamount would be a __________.

Important advantage of sampling seawater using a Niskin bottle carousel compared with dropping a line of Nansen bottles?

Modern underwater habitats are simple in design and easy to use.

The first true oceanographic expedition was conducted by which vessel?

Which sampling device could best provide a history of sediment deposition at a given location in the ocean?

Most ancient sailors considered the ocean’s surface featureless except for islands.

Modern oceanographers no longer have to be concerned with difficult working conditions at sea.

A greater amount of life is found in the earth's oceans than is found on land.

The first attempts in history to use technology to extend the time a diver could stay underwater involved diving bells.

Which of the following inventions did the most to make ocean navigation more accurate?

The greatest challenge to helmet diving was

Beebe and Barton constructed and crewed the Bathysphere

The greatest challenge to deep-sea diving is

Very little ocean exploration probably happened before the Age of Exploration.

Early ocean explorers took great risks mainly to learn more about the oceans.

The one hazard of deep diving that cannot be corrected by a special mixture of gases is __________.

People can’t explore most of the ocean in person.

UUVs were developed to balance the exploration the need to protect human life from the hazards of deep sea exploration.

If there's an open "moon pool," which of the following describes the air pressure in the habitat?

Nansen bottles collect more data more quickly than Niskin bottles do.

The risks and expense of manned deep-water exploration must be balanced with the knowledge that will be gained.

Which of the following would an oceanographer likely not be employed to do?

The remains of the oldest-known boat were found in a desert.

The HMS Challenger expedition covered three oceans and lasted four years.

Which of the following types of vessels can cover the most territory in a given amount of time?

Small-area sampling gives oceanographers the best overall understanding of the oceans.

Which of the following was the first vessel to descend into Challenger Deep, the deepest point known in the oceans?

In what ways does an ROV differ from a DSV?

The HMS Challenger was the first research vessel to use sonar.

If a scuba diver ascends to the surface too quickly oxygen bubbles can form in his blood, causing the bends.

The oldest known remains are of a boat that was likely built

Which of the following has been measured using satellite technology?

Due to the dangers involved, no one would ever consider diving to Challenger Deep alone.

Mixed-gas diving is typically used for