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WorksheetsDMS Benchmark Re-assessment
Total questions: 12
Worksheet time: 3600secs
Name
Class
Date
1.
Iron and oxygen combines to form rust (iron oxide)If 111.7 grams of iron combines with 48.0 grams of oxygen, how many grams of iron oxide are produced?
a)
32.0
b)
63.7
c)
111.7
d)
159.7
2.
All of the forces acting on a rolling ball are balanced when the ball is ________
a)
slowing down.
b)
bouncing.
c)
moving at a constant speed.
d)
increasing its speed.
3.
Which of the following conditions is necessary for a moving object to accelerate?
a)
The forces acting on an object are unbalanced.
b)
The forces acting on an object are balanced.
c)
A force is equal to the mass of the object.
d)
A force converts friction into energy.
4.
What type of substance is methane gas (CH4)?
a)
an atom
b)
an element
c)
a compound
d)
a mixture
5.
Which of the following is formed when oil and water are shaken together?
a)
Heterogeneous mixture
b)
Compound
c)
Homogenous mixture
d)
Element
6.
Which quantity remains constant during any chemical reaction?
a)
the total number of compounds
b)
the total number of molecules
c)
the total amount of mass
d)
the total amount of heat
7.
K + Br -> KBr 39 grams of potassium was used to produced 118 grams of potassium bromide. What was the mass of bromide used for this reaction?
a)
157 grams
b)
79 grams
c)
97 grams
d)
160 grams
8.
If a net force acting on an object increases, then __________
a)
the object's mass will decrease
b)
the object will decelerate.
c)
the object will accelerate.
d)
the object's mass will increase.
9.
Which statement best distinguishes between a compound and a mixture?
a)
Only a mixture has more than one atom.
b)
Only a compound is a pure substance.
c)
Only a mixture has more than one element.
d)
Only a compound has chemical properties.
10.
As a pushed ball rolls downhill, its speed increases. Which of these forces causes the increase in speed?
a)
gravitational pull
b)
ground friction
c)
air pressure
d)
air resistance
11.
A wagon is rolling down a slight hill. What will eventually cause it to come to a stop?
a)
gravity
b)
friction
c)
inertia
d)
velocity
12.
Which of these substances is an element?
a)
Na+
b)
CO
c)
H2O
d)
MgCl
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