Homework Due May 2nd, 2017
Answer the following questions
1)What equation would you use to find the volume of a
rectangular box?
A) volume = length × width × height B) volume = length +
width + height C) volume =
length × width D) volume = length + width
2)Which of the following is the equation used to calculate a
substance’s density?
A) D = V/m B) D = m/V C) D = m + V D) D = V × m
3)What happens to a solid object with a density that is less
than the density of water when it is
placed in water?
A) The object dissolves in the water. B) The object
displaces a quantity of water greater
than its volume. C) The object settles to the bottom of the
water. D) The object floats on
top of the water.
4)Which of the following units are best for expressing the
density of a solid?
A) g/mL B) m3/kg C) g/cm3 D) N/cm3
5)Which physical property of matter describes the
relationship between mass and volume?
A) density B) ductility C) reactivity D) weight
6)Why does ice float on top of liquid water?
A) Ice has a lower density than water. B) Ice has a higher
density than water. C) Ice is a
solid. D) Ice is colder than water.
7)If you have 5 mL of a liquid that has a mass 20 g, what is
the density of the liquid?
A) 0.79 mL/g B) 0.79 g/mL C) 1.26 mL/g D) 4 g/mL
8)To compare the densities of oil and water, pour the
liquids into a container and observe how
they
A) change color. B) evaporate quickly. C) separate into
layers. D) create an odor.
9)What units would you use to measure liquid volume in an
experiment?
A) grams or kilograms B) meters or centimeters C) newtons D)
liters or milliliters
10) Why is density
considered a useful property for identifying matter?
A) Different substances have the same densities. B) Density
is unique to each substance.
C) Density predicts whether objects float. D) Density varies
at different temperature.
11)What property of matter is demonstrated by the fact that
you cannot fit any more books onto a
bookshelf that is already filled?
A) inertia B) mass C) volume D) weight
13)Why doesn’t an ice cube float in air?
A) Water is less dense than air. B) Air is denser than ice.
C) An ice cube is denser than
air. D) Air has more pressure.
14)Which of the following is NOT true about water?
A) Water is more dense than air. B) A volume of water weighs
more than the same
volume of air. C) Water exerts more pressure than air. D)
Water is less dense than air.
15)What is the secret of how a ship floats?
A) the number of passengers it carries B) the amount of
cargo it carries C) its hollow
shape D) its size
16)Which of the following causes an object to buoy up?
A) buoyant force greater than the object’s weight B) buoyant
force less than the object’s
weight C) buoyant force equal to the object’s weight D) high
air pressure
17)How do you find the volume of an irregular solid?
A) by multiplying the lengths of its sides B) through water
displacement C) by using a
balance D) by weighing it
19)Which of the following substances is less dense than air?
A) water B) helium C) ice D) gold
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20) Why do air
bubbles in water rise to the surface?
A) Liquids cannot be
compressed very much. B) Water is about 1,000 times denser than
air. C) Pressure is the amount of force exerted on a given
area. D) The weight of the
atmosphere pushes down on the water.
21) Snowshoes enable a person to walk on deep snow because
the snowshoes
A) decrease the person’s weight on the snow. B) increase the
area over which the
person’s weight is distributed. C) increase the pressure on
the snow. D) increase the
buoyancy of the person.
22) A unit of
pressure is called a
A) bernoulli. B) pascal. C) pound. D) meter.
23) Given that the
air pressure outside your body is so great, why aren’t you crushed?
A) Human skin is extremely strong. B) Earth’s gravity
cancels out the air pressure.
C) Pressure inside your body balances the air pressure
outside your body. D) Inertia
changes the pressure before it comes into contact with you.
24) Air pressure
decreases as
A) velocity increases. B) elevation increases. C)
acceleration decreases. D) gravity
increases.
25) Water pressure increases as
A) depth increases. B) gravity increases. C) force
decreases. D) acceleration decreases.
26) Which of the
following is true of the buoyant force?
A) It acts in the downward direction. B) It acts with the
force of gravity. C) It acts in the
upward direction. D) It makes an object feel heavier.
27) What effect does
a buoyant force have on a submerged object?
A) It causes the object to sink in a fluid. B) It causes a
net force acting upward on the
object. C) It causes the object to float in a fluid. D) It
causes a net force acting
downward on the object.
28)According to Archimedes’ principle, if an object floats,
the volume of displaced water is
equal to the volume of
A) the entire object. B) the portion of the object that is
above water. C) the portion of
the object that is submerged. D) exactly half of the object.
29) What scientific
rule states that the buoyant force on an object is equal to the weight of the
fluid displaced by the object?
A) Archimedes’ principle B) Pascal’s principle C)
Bernoulli’s principle D) Newton’s
third law of motion
30) A ship stays
afloat as long as the buoyant force is
A) less than the ship’s weight. B) greater than the ship’s
weight. C) less than the ship’s
speed. D) greater than the ship’s speed.
31) The mass per unit
volume of a substance is its
A) density. B) buoyancy. C) weight. D) fluid pressure.
32) Which of these
substances is the LEAST dense?
A) wood B) copper C) mercury D) rubber
33) Pressure can be
measured in units of
A) newtons. B) newtons per square centimeter. C) newtons per
centimeter. D) newtons
per cubic centimeter.
35) Fluid pressure is
the total force exerted by the fluid divided by
A) the area over which the force is exerted. B) the
acceleration of the force. C) the
gravitational pull within the fluid. D) water pressure or
depth.
