Science Chapter 17 test
Which has a greater density water or ice?
Water has a greater density because when water molecules freeze into ice crystals they form a pattern and there is a unusual amount of empty space left.
Brittleness measures a material's
ability to shatter upon impact
Which is more malleable aluminium or glass cookie dough or life savers
aluminium and cookie dough
What is a fluid
any matter that is able to flow it can be liquid or gas
Malleability measures a solid's ability to
be pounded into thin sheets
Which has more tensile strength bungee cord or extension cord tennis racquet or baseball bat
bungee cord and tennis racquet
Which is harder diamond or glass soap or marble
diamond and marble
Archimedes' Principle tells us that the force
exerted on an object in a liquid is equal to the weight of the fluid displaced
Which is more brittle glass or rubber ceramic mug or plastic water bottle
glass and ceramic mug
Density is a property that describes the relationship between
mass and volume
Tensile strength is a measure
of how pulling or tension a material can withstand before breaking
Name 3 fluids with high viscosity
olive oil, canola oil, and cold syrup
Which is more elastic rubber or wood rubber band or salt water taffy
rubber and rubber band
Hardness measures a solid's resistance to
scractiching
Elasticity is the measure of a solid's ability to be
stretched and then returned to its original size
Why are some liquids more viscous than others?
Because of their hydrogen bonds with the oxygen atoms
A steel block and a steel boat have the same density the block sinks while the boat floats why?
Because off the shape of the object since it was flat it floated
An object floats if
the buoyant force is equal to the weight of the object
Neutral buoyancy occurs when
the buoyant force is equal to the weight of the object
Name and define 3 important properties or fluids
Density:how tightly packed the molecules and atoms are Viscosity: fluids resistant to flow Buoyancy: an upward force that a liquid exerts on a object
What is the hardest natural substance on earth?
Diamond
As temperature of a solid increases, the volume increase slightly because of the increase vibrations of the molecules. How does this effect density?
the density decreases
Viscosity measures
the material's resistance to flow
Buoyancy measures
the upward force a fluid exerts on a object
Name 3 fluids with low viscosity
warmed maple syrup,Hot fudge, hot cocoa
Liquid and Solid Silver Do the have the same mass? DO they have the same volume? Do they have the same density?
yes,no,no
How does the temperature affect viscosity of Liquids? Gases?
Liquids- in lower temperatures the hydrogen atoms tend to loose connections Gas- of you raise the temperature of gas it is more resistant to flow