MR. LEWIS’S 8 TH GRADE SCIENCE FORCES IN FLUID QUIZ

SNOWSHOES ENABLE A PERSON TO WALK ON DEEP SNOW BECAUSE THE SNOWSHOES… a.Decrease the person’s weight on the snow.Decrease the person’s weight on the snow. b.Increase the area over which the person’s weight is distributedIncrease the area over which the person’s weight is distributed c.Increase the pressure on the snowIncrease the pressure on the snow d.Increase the buoyancy of the personIncrease the buoyancy of the person

A UNIT OF PRESSURE IS CALLED A … a.BernoulliBernoulli b.PascalPascal c.PoundPound d.metermeter

AIR PRESSURE EXERTED EQUALLY ON AN OBJECT FROM DIFFERENT DIRECTIONS IS … a.Balanced pressureBalanced pressure b.Gravitational pressureGravitational pressure c.Fluid pressureFluid pressure d.Constant pressureConstant pressure

GIVEN THAT THE AIR PRESSURE OUTSIDE YOUR BODY IS SO GREAT, WHY AREN’T YOU CRUSHED? a.Human skin is extremely strong.Human skin is extremely strong. b.Earth’s gravity cancels out air pressureEarth’s gravity cancels out air pressure c.Pressure inside your body balances the air pressure outside your body.Pressure inside your body balances the air pressure outside your body. d.Inertia changes the pressure before it comes into contact with you.Inertia changes the pressure before it comes into contact with you.

AIR PRESSURE DECREASES AS… a.Velocity increasesVelocity increases b.Elevation increasesElevation increases c.Acceleration decreasesAcceleration decreases d.Gravity increasesGravity increases

WATER PRESSURE INCREASES AS… a.Depth increasesDepth increases b.Gravity increasesGravity increases c.Force decreasesForce decreases d.Acceleration increasesAcceleration increases

WHICH TYPE OF SUBSTANCE DOES PASCAL’S PRINCIPLE DEAL WITH? a.SolidsSolids b.FluidsFluids c.PowdersPowders d.MetalsMetals

ONE APPLICATION OF PASCAL’S PRINCIPLE IS… a.A hydraulic car liftA hydraulic car lift b.The flight of an airplaneThe flight of an airplane c.A speedboat’s bottom slapping against the waves.A speedboat’s bottom slapping against the waves. d.The buoyancy shown by ducks and other waterfowlThe buoyancy shown by ducks and other waterfowl

WHAT SCIENTIFIC RULE DESCRIBES WHY WATER SQUIRTS FROM A PLASTIC BOTTLE WHEN SQUEEZED? a.Bernoulli’s principleBernoulli’s principle b.Archimedes’ principleArchimedes’ principle c.Pascal’s principlePascal’s principle d.Newton’s first law of motionNewton’s first law of motion

WHAT DOES A HYDRAULIC SYSTEM DO? a.Decrease pressureDecrease pressure b.Increase velocityIncrease velocity c.Multiply forceMultiply force d.Reduce inertiaReduce inertia

ANSWERS 1.B 2.B 3.A 4.C 5.B 6.A 7.B 8.A 9.C 10.C