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Which of these uses the force of gravity to make it move?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 A
sai
lboat
movi
ng a
c...
A c
ar m
akin
g a ri
ght turn
A s
now sle
d goin
g ...
A b
icyc
le ro
lling to
a ..
.
25% 25%25%25%A. A sailboat moving across a lake
B. A car making a right turn
C. A snow sled going downhill
D. A bicycle rolling to a stop
The presence of permafrost is acharacteristic of which major biome?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%A. Tundra
B. Taiga
C. Temperate forest
D. Grasslands
Plants release oxygen into the air as aresult of photosynthesis. Which of these
do plants need for photosynthesis?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%A. Carbon dioxide
B. Nitrogen
C. Methane
D. Hydrogen
A student wanted to test the hypothesis that adding antifreeze to water lowers the freezing
point of water. The student found that pure water froze at 0°C, while the water/antifreeze mixture
froze at 20°C. In order to confirm the results, the student should repeat the experiment using —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 a
con
tain
er o
...
a d
iffer
ent .
..
a d
iffer
ent .
..
exa
ctly
the
...
25% 25%25%25%A. a container of a different size
B. a different amount of antifreeze
C. a different amount of water
D. exactly the same set-up as the first experiment
This experiment was set up to test thehypothesis that plants grow faster in green
light. What is the independent variable in this experiment?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%
A. Type of plant
B. Amount of water
C. Color of light
D. Size of pot
Which of the following elements has16 protons?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%
A. Oxygen
B. Chlorine
C. Sulfur
D. Germanium
The amount of gravitational attractionbetween the Earth and an object
depends on the object’s distance fromthe Earth and the object’s —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%A. shape
B. mass
C. state of matter
D. size
Of the following, which is the correctprogression in the food chain?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%A. Producers → herbivores → carnivores
B. Herbivores → producers → carnivores
C. Producers → carnivores → herbivores
D. Carnivores → herbivores → producers
Which of these are found in plant cellsbut not in animal cells?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
Mito
chond
ria
Chlo
ropla
sts
Cel
l mem
bran
es
Endop
lasm
ic re
ticulu
m
25% 25%25%25%A. Mitochondria
B. Chloroplasts
C. Cell membranes
D. Endoplasmic reticulum
A student predicts that more sugar willdissolve in warm water than in cold water. She
puts some water in a container, adds sugar, and then stirs. The amount of undissolved sugar is then observed. When this student
repeats the experiment to verify her prediction, the only thing that should change is the —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 a
mou
nt of .
..
tem
perat
ure...
am
ount o
f ...
am
ount o
f ...
25% 25%25%25%
A. amount of water used
B. temperature of the water
C. amount of sugar used
D. amount of time stirring
Which of the following molecules does not contain three atoms?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 O
3 N
2 H
2O C
O2
25% 25%25%25%A. O3
B. N2
C. H2O
D. CO2
The function of a cell nucleus is to —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 d
irect
the
activ
ities
of..
.
hel
p th
e ce
ll ex
pel w
aste
dig
est f
oreig
n subst
...
tran
sport
subs
tance
s...
25% 25%25%25%A. direct the activities of the cell
B. help the cell expel waste
C. digest foreign substances
D. transport substances around the cell
Which of these best shows what is happening to the cell in pure water?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%
A. B. C. D.
Which of these processes in the water cycle causes dew to form in
the morning?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%A. Condensation
B. Evaporation
C. Transpiration
D. Precipitation
A student conducted an experiment on plant growth that required adding about one cupful of liquid fertilizer to several plants each week. In order to accurately measure the fertilizer givento each plant, the fertilizer volume should be
measured in —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%
A. cubic meters
B. milliliters
C. cubic feet
D. kiloliters
Early space flights were unmannedbecause —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 h
uman
s had
no
inte
re..
relia
ble li
fe-s
upport
...
rock
ets
flew
too fa
st f.
.
hum
ans
could
not w
i...
25% 25%25%25%A. humans had no interest in space exploration
B. reliable life-support systems were not yet developed
C. rockets flew too fast for human survival
D. humans could not withstand the force of takeoff
One way plants and animals are alike is that they both —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 m
ove
to g
et th
eir f
ood
mak
e th
eir o
wn food
use
car
bon dio
xide
use
oxy
gen
25% 25%25%25%
A. move to get their food
B. make their own food
C. use carbon dioxide
D. use oxygen
Consumers of electrical energy arebilled according to how much energy they
use. The unit most commonly used for measuring electrical energy consumption
is the —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
mill
ivolt
ohm
met
er
new
ton-
met
er
kilo
watt-h
our
25% 25%25%25%
A. millivolt
B. ohmmeter
C. newton-meter
D. kilowatt-hour
Which of these cannot be separated into its parts by an ordinary chemical
or physical process?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%A. A mixture of salts (NaCl, KI)
B. A compound of nitrogen (NH3)
C. An atom of carbon (C)
D. An acid of chlorine (HCl)
A student determined the mass andvolume of a gold ring. What physical
property of the gold can be determinedusing these two measurements?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%A. Its reactivity
B. Its expansion rate
C. Its density
D. Its melting point
Which of these best shows particles in a mixture?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%A. B.
C. D.
Which of the following orientations ofmagnets would result in the greatestattraction between the two magnets?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%A. B.
C. D.
The Earth is warmed by solar energy. How is this energy transferred from
the sun to the Earth?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%
A. Radiation
B. Convection
C. Conduction
D. Ultrasonic
An example of kinetic energy continuously being changed to potential energy and
back again might be —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%A. a girl swinging on a swing
B. a train moving down a track
C. electric charges moving in a straight path
D. a plate sitting on the edge of a table
A new medication dissolves blood clots. However, if too much is used, excessive bleeding occurs. Which method should scientists use to determine the best
dosage of this new medication?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%A. Use people of many different ages as test
subjects
B. Have the test subjects eat a wide variety of foods with the medication
C. Change the times the medication is given to determine if timing affects bleeding
D. Vary only the dosages of the medication while keeping everything else constant
In an experiment combining vinegarand baking soda, gas is given off. In
this chemical reaction, the vinegar andbaking soda are —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%
A. Reactants
B. Products
C. Elements
D. suspensions
Suppose that in a certain area, mice are the main food source for wolves. Based on the
graph, in which year would there be the least amount of competition among wolves for food.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%
A. 1975
B. 1980
C. 1985
D. 1990
A wheel-and-axle is a lever that rotatesaround a fixed point. All of the following
machines employ a wheel-and-axle except a —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%A. bicycle
B. skateboard
C. pencil sharpener
D. crowbar
Scientists have been able to find noatmosphere around this planet becauseit has little gravity and is closest to the
sun. The planet described is —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%A. Mercury
B. Earth
C. Venus
D. Saturn
As a supplement to some diets, iron istaken in tablet form. The mass of iron
in these tablets is often measured in —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%A. milliliters
B. calories
C. centimeters
D. milligrams
Some students counted the birds in an area. They counted the number of species present and the number of birds in each species. Which of these would be best
to use to report the results?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%
A. B.
C. D.
Which amphibian is most aquatic?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%
A. B.
C. D.
Between points 4 and 5, energy isbeing used to change water from a —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%
A. solid to a liquid
B. solid to a gas
C. liquid to a gas
D. liquid to a solid
Which drawing shows a circuit thatwill cause the light to come on?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%
A. B.
C. D.
A compound is a molecule made up ofatoms from at least two elements. Which of the following gases is a compound?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%A. Ozone (O3)
B. Oxygen (O2)
C. Methane (CH4)
D. Nitrogen (N2)
Which of these correctly shows how alight ray is reflected from a mirror?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%
A. B.
C. D.
This flashlight uses three different forms of energy. Which of these shows the energy
changes in the correct order?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%
A. Mechanical → heat → chemical
B. Heat → chemical → light
C. Electrical → mechanical → chemical
D. Chemical → electrical → light
In humans, which of these is requiredfor carrying oxygen from the lungs to
body cells?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%A. Plasma
B. Platelets
C. Red blood cells
D. White blood cells
The only place visited by mannedexploration outside Earth is —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
the
sun
the
moon
Ven
us
Mar
s
25% 25%25%25%A. the sun
B. the moon
C. Venus
D. Mars
The primary producer in the ecosystem below is the —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%
A. plant
B. rabbit
C. hawk
D. fox
During mitosis, the doubling ofchromosomes ensures that both
new cells —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%A. have identical genetic makeup
B. are twice the size of the parent cell
C. serve different functions
D. remain attached to each other
Many living organisms have body structures that go from very simple to very complex.
Which of these places the structures in the correct order, from least complex to most
complex?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%
A. System, organ, tissue, cell
B. Organ, tissue, cell, system
C. Cell, system, organ, tissue
D. Cell, tissue, organ, system
During the process of evaporation,liquid water becomes —
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
tiny
drops
of wat
er
sep
arat
e at
oms
of wat
er
mol
ecul
es o
f wat
er v
...
ato
ms
of hyd
rogen
a..
25% 25%25%25%A. tiny drops of water
B. separate atoms of water
C. molecules of water vapor
D. atoms of hydrogen and oxygen
Which of the following is an example of a decomposer at work
in the food web?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25
25% 25%25%25%A. A tree growing in a field
B. A grasshopper eating leaves
C. A seagull catching a fish
D. A fungus growing on a log