click below
click below
Normal Size Small Size show me how
6th Grade Chapter 7
Section 2
Question | Answer |
---|---|
Water exerts fluid pressure on | all sides of an object |
Pressure exerted horizontally on one side of an object is | equal to the pressure exerted on the opposite side |
Buoyant force is not affected by | weight |
An object in fluid will sink if | its weight is greater than the buoyant force |
Ice cube floats on water because | it is less dense than water |
Balloon floats with helium because | helium has one-seventh the density of air |
Secret of how a ship floats | is its shape |
Hollow shape increases | volume of the ship |
(changing mass) Submarines have | ballast tanks that can be opened to allow sea water to flow in |
Three methods to change the overall density of an object | Change shape, change mass, change volume |
Changing volume - bony fishes have an organ called a swim bladder (inflated swim bladder increases fishes volume) that is filled with | gasses produced in the blood |