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Matter Review
Test Description: Review of molecules, atoms, and states of matter.
Instructions: Answer all questions to get your test result.
1) What do scientists call a substance that is made of two or more elements?
A
Nucleus
B
Element
C
Atom
D
Compound
2) What is a pure lump of elemental gold made of?
A
Gold and air atoms
B
Compound ds of gold
C
Gold atoms
D
Gold cells
3) Which of the following is the best model for molecules in a gas?
A
Marbles in a box
B
Marbles glued together in a lump
C
Marbles being shaken in a box
D
Marbles frozen in a box
4) Early chemists thought the parts of the atom were spread evenly throughout the atom. How has the model changed? We now know
A
That it is shaped like a cube
B
It has most of its mass in the center
C
It is standing still
D
Most of Tha atoms particles are in the outer layers
5) An understanding of the structure of an atom has been developed. How much time did it take to do?
A
1 -2 years in a government project
B
Fifty years when a scientist created it as a special project
C
Several hundred years as many scientists worked on it.
D
Several weeks of time at a university physics department
6) What happens to molecules of a liquid when it turns to gas? The molecules have:
A
Moved around from the container
B
Moved slowly enough to escape the liquid
C
Moved toward the other molecules
D
Moved fast enough to escape the liquid
7) An increase in temperature of a liquid causes it to change to which phase?
A
Solid
B
Gas
C
Liquid
D
Plasma
8) A decrease in the temperature of a gas would cause a change to which of the following phases first?
A
Liquid
B
Plasma
C
Gas
D
Solid
9) Students placed a balloon with air in the freezer for several hours. What will they observe when they take the balloon out?
A
The balloon had expanded
B
The balloon was the same as when they started
C
The balloon had shrunk
D
The balloon changed color and shape
10) Sidewalks have cracks that are imprinted every meter or two. What is the purpose of these cracks?
A
They help prevent cracking when the cement is heated
B
It makes the sidewalk easier to measure
C
They have always been there
D
The sidewalk looks better and can be more easily manufactured
*select an answer for all questions
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