In a series of controlled experiments, a student
measures the force acting on a wheeled cart and the
cart’s acceleration. The student’s data is shown below.
Based on the student’s observations, what is the mass
of the cart in kilograms?
How many oxygen atoms are
in the compound Cu(NO3)2?
Earth’s land, oceans, and atmosphere maintain fairly
constant average temperatures. What is the best
explanation for these constant average temperatures?
A. Earth’s Northern
have opposite seasons.
B. Earth is tilted and rotates
daily on its axis.
C. The continuous motion of
air and water distributes
the sun’s energy.
D. Global energy systems
generally move from west
The function of the plant cell
structure shown in the
enlargement is to -
A. provide support for the
B. direct the cell’s
C. use energy from
sunlight to make
D. regulate substances
that enter and exit the
All chemical reactions follow
the law of conservation of
mass. Which equation below
A. 2Al + 6HCl → 3AlCl3 + 3H2
B. CS2 + 2O2 → CO2 + SO2
C. NO2 + H2O → HNO3 + NO
D. Zn + H2SO4 → H2 + ZnSO4
In the food web below, which organism
transfers energy from producers to secondary
A Prickly pear cactus
B Kangaroo rat
C Great horned owl
D Gila monster
A major difference between an
element and a compound is
A an element can be combined with
other elements to make larger
molecules, but compounds cannot be
combined with other compounds.
B a compound can be broken down into
elements, but elements cannot be
broken down into simpler
C an element can easily dissolve in
water, while compounds are
insoluble except in extreme
D a compound can easily react with
other substances, but an element is
Measurements I through IV were made for a
cube-shaped object consisting of an unknown
substance. Using the information below, what
is the density of the unknown substance?
A. 0.9 g/mL
B. 1.1 g/mL
C. 3.3 g/mL
D. 8.6 g/mL
I. W hen the cube is placed on a ba lan ced, it reads 30 g .
II. W hen a ther mom et er is plac ed on the cub e, the te mper ature is reco rded at
III. A m eas ure m ent of o ne side of the c ube us ing ca lipers is 3.0 cm .
IV. The wat er leve l increases fro m 50 m l to 7 7 m L when the cu be is placed in a
gradua ted cy lind er of water.
V. The cu be has a har dness m easur em ent of 3.5 on the M ohs sca le
A bird flies north at a constant
3.5 m/s. Which of the following
A The bird’s velocity is 3.5
B The bird’s acceleration is
3.5 m/s2 north.
C The bird’s acceleration is
D The bird’s speed is 3.5
Which of the energy
transformations occur in the
A Chemical energy is converted to
thermal energy and light energy.
B Chemical energy is converted to
electrical energy and kinetic
C Light energy is converted to
chemical energy and thermal
D Kinetic energy is converted to light
energy and thermal energy.