WorksheetsMock Exam
Total questions: 40
Worksheet time: 21mins
In a solution the substance that does the dissolving is called ______.
soluble
the solute
the solvent
an ion
Ethanol dissolved in water would be an example of ______.
a solution between two miscible liquids
a solution between a solid and liquid
a suspension between two liquids
ethanol and water do not form a solution
Which one of the following is an example of a physical change?
iron rusting
a steak cooking
sugar dissolving in water
a candle burning
Heptane is always composed of 84% carbon and 16% hydrogen by mass. What law does this observation illustrate?
The Law of Multiple Proportions
The Law of Definite Proportions.
The Law of Conservation of Mass
The Law of Conservation of Energy
Give the mass number for an atom that has 10 protons, 10 electrons, and 11 neutrons.
31
20
10
21
Compared to a glass of ice water with ice in it, a glass of plain ice-cold water without ice on a warm day will warm up ______.
faster
slower
in the same amount of time
none of the above
Jacques Charles was a French hot air balloonist and scientist. He discovered Charles' law by studying the relationship between the volume and temperature of a gas at a constant atmospheric pressure. As the temperature of the gas in a balloon increased, its volume also increased. These increases inflated and lifted the balloon.
In equation form, for the case of a constant pressure:
V/T = constant
If the volume of a gas at a certain pressure is halved, ______.
its temperature is halved
its temperature is doubled
its temperature remains constant
its temperature increases according to a geometric progression
Unless an object at rest is acted upon by a force, it stays at rest due to its ______.
matter
inertia
fricton
gravity
Maron rode on his bike from 9:00 am to 10:30 am. If he drove at an average speed of 15kph, what was the total distance he covered?
17.5 km
22.5 km
27.5 km
32.5 km
The 0.20 kg block is attached to a spring which has a spring constant of 20 N/m. The block is initially stretched 0.10 meters and released at time t = 0 seconds. Complete the following statement: In order to increase the frequency of the motion, one would have to ______.
reduce the spring constant
decrease the mass of the block on the end of the spring
increase the length of the spring
reduce the distance that the spring is initially stretched
The acceleration in a body is due to
balanced force
unbalanced force
mass
electrostatic force
From the illustration, one can conclude that ______.
cube A has the least weight
cube C has the highest density
cube A has the highest density
water has greater buoyant force than cube A
Cube c sinks because ______
it weighs much
it displaces much water
its weight is less than the weight of the water it has displaced
its weight is greater than the weight of the water it has displaced
A 200 N box is pushed up an incline that is 5.00 m long and rises 1.00 m. If the incline is frictionless, then the work done by the pushing force is ______.
336 J
305 J
275 J
200 J
A 2000 kg car accelerates from rest to a velocity of 20 m/s in 10 seconds. The power of the engine during this acceleration is ______.
200 kW
20,000 kW
4,000 W
40 kW
Your flashlight has three identical 1.5 volt batteries in it, arranged in a chain to give a total of 4.5 volts. Current passes first through battery (a), then through battery (b), then through battery (c), on its way to the bulb. When you operate the flashlight, the batteries provide power to the current and they gradually use up their chemical potential energy. Which battery will run out of chemical potential energy first?
All three will run out at the same time.
Battery (a) will run out first.
Battery (b) will run out first.
Battery (c) will run out first.
A student wishes to find the density of an irregular piece of rock. How will she find volume?
length x width x height
place it on a triple beam balance
put it in a beaker
use water displacement
Suppose you have a pendulum clock which keeps correct time on Earth (acceleration due to gravity = 9.8 m/s2). Without changing the clock, you take it to the Moon (acceleration due to gravity = 1.6 m/s2). For every hour interval (on Earth) the Moon clock will record ______.
(9.8/1.6) h
1 h
SQRT(9.8 / 1.6) h
(1.6/9.8) h
SQRT(1.6 / 9.8) h
As a star exhausts hydrogen in its core, it ______.
becomes hotter and more luminous
becomes cooler and more luminous
becomes hotter and less luminous
becomes cooler and less luminous
An upright stick that is allowed to cast a shadow in sunlight is called ______.
Almagest
Primum mobile
Equinox
gnomon
A solar or lunar eclipse will occur ______.
when the sun is near the line of nodes of the moon and the moon is new or full
any time the moon is new or full
when the sun is near the solstice and the moon is new or full
half way through an eclipse year
when the sun is near the equinox and the moon is new or full
Which country shows the greatest rate of increase over the years?
Hongkong
Kuwait
Italy
USA
The freezing point of this substance is ______.
0°C
10°C
20°C
30°C
What factor distinguishes a suspension from a colloid?
light reflects off the particles of a suspension
the particles of a suspension will sink out if left over time to rest
suspensions are clear
suspensions cannot be filtered
Hydrogen and oxygen molecules in a gas sample have the same temperature. This means the hydrogen molecules, on the average, have the same ______.
speed, but more kinetic energy
kinetic energy, but more speed
kinetic energy, but less speed
speed and the same kinetic energy
Taken by itself, the fact that 8.0 g of oxygen and 1.0 g of hydrogen combine to give 9.0 of water demonstrates what natural law?
Multiple Proportions
Periodicity
Conservation of Mass
The Atomic Theory
What are the coefficients that will balance the formula equation below?
AlCl3 + NaOH Al(OH)3 + NaCl
(a)
When heat is absorbed by the system from the surroundings, the process is said to be ______, and the sign of process is ______.
exothermic, negative
endothermic, positive
exothermic, positive
endothermic, negative
Which of the following did not help Darwin formulate his theory of evolution?
fossil evidence that species had changed over time
closely related species on oceanic islands
belief that the earth was several thousand years old
evidence of artificial selection in domestic animals
Of the following biological levels of organization, which represents the smallest or lowest level?
organs
organisms
cells
tissues
Differences between eukaryotic and prokaryotic cells include all of the following except ______.
eukaryotic cells have mitochondria
eukaryotic cells have cilia and flagella with complex structure
prokaryotic cells have more complex cell walls
prokaryotic cells have no genetic material
The optimum temperature for an organism is the one at which ______.
it grows with the shortest generation time
it has the longest time between cell divisions
it is near one extreme of its range of tolerated temperatures
its enzymes begin to denature
In a plant, what part stores sugars as starch?
leaves
roots
seeds
all of the above
ADP energy is used for _______.
synthetic reactions
active transport
all energy-requiring processes in cells
none of the above
The cytoskeleton of the cell functions to _______.
give the cell shape
anchor organelles
allow organelles to move
all of the above
During ______, the chromosomes attach to the spindle and align at the metaphase plate of the spindle.
prophase
prometaphase
metaphase
anaphase
If two flies heterozygous for wing length and body color are crossed, which of the following are possible results?
chance of L, long wings = 3/4
chance of l, short wings = 1/2
chance of G, grey body = 1/4
all of the above are true
A cross in which true-breeding plants differ in two traits is known as a _______ cross.
test
dihybrid
multi trait
hybrid
The vertebrate skeleton _______.
is a living tissue which grows with the animal.
protects internal organs.
serves as a place of attachment for muscles.
all of the above
Protoplasts are cells without _______.
a nucleus
a membrane
a wall
cytoplasm
