| A | B |
|---|
| People who explore inner space are called | aquanauts |
| Floating objects are supported by a force called | buoyancy |
| _____ attempted to circumnavigate the earth by ship. | Magellan |
| A ____ device uses sound to make readings of the sea floor | Sonar |
| Early divers could work underwater in a helmeted diving chamber. How do modern divers breathe underwater? | modern divers breathe compressed air from an aqualung |
| The Nansen bottle is used to | sample water at different depths. |
| Another term used to describe the ocean world is ____. | inner space |
| _______ laid down the laws of flotation and the principle which states that a body immersed in a fluid experiences a buoyant force equal to the weight of the displaced fluid. | Archimedes |
| Archimedes' principle states that the buoyant force on any object is equal to the _______of the liquid that the object displaces or pushes aside. | Weight |
| Archimedes' principle states that a body immersed in a liquid seems to lose _______. | Weight |
| A ship floats because it is constructed of many __-filled compartments. __ weighs less than water. Thus, the weight of __ and steel in the ship is less than the weight of the water displaced by the ship so the ship floats. | Air |
| Why do some objects sink while others float? | Archimedes' principle explains this. |
| The buoyant force on any object is equal to the ________. | weight of the liquid that the object displaces or pushes aside |
| The earliest recorded trading routes were started by the _____about 2000 B.C. They lived in the coastal area of the ________ Sea where present-day Syria and Lebanon are located | Phoenicians; Mediterranean |
| List 5 special characteristics that Viking ships had | flat bottoms so they could sail in shallow waters; 15-30 meters long, made almost entirely of oak;powered by sails and oars. |
| The ancient sea farers used the ocean primarily for | shipping and trading |
| The best explanation for the failure to find all sunken ships is | the ocean |
| Because of his work, ________ is | Sir Charles Thompson |
| An important advantage that a submersible has over scuba is that the submersible | be used at greater depths. |
