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- 1. Multiple Choice
Which is a phase change of matter that can always occur without a substance changing its identity?
dissolving
freezing
reacting
rusting
- 2. Multiple Choice
Which describes a chemical property of iron?
Iron is ductile.
Iron readily forms rust in moist air.
The melting point of iron is 2,797°F.
Iron is a silvery-white or grayish metal.
- 3. Multiple Choice
Why would the objects pictured above MOST likely have different weights?
They have different shapes.
They have different masses.
They have different dimensions.
They have different surface areas.
- 4. Multiple Choice
When bubbles form in a liquid, which physical change is happening?
condensing
boiling
freezing
melting
- 5. Multiple Choice
According to the particle theory of matter, there is space between the small particles that make up matter. The space between particles differs depending on the state of the matter. Which list ranks the states of matter, according to the spacing between particles, from largest to smallest?
solid, liquid, gas
gas, solid, liquid
liquid, gas, solid
gas, liquid, solid
- 6. Multiple Choice
Which list contains only objects made up of atoms?
steel, water, sand, dolphin
light, rock, apple, squirrel
palm tree, electricity, salt, air
paper, vinegar, heat, helium
- 7. Multiple Choice
Materials that let electrons flow very easily from one atom to another
are called insulators.
are called conductors.
are called non-metals.
are called resistors.
- 8. Multiple Choice
Which of the following has the ability to change the state of matter?
heat
wind
light
sound
- 9. Multiple Choice
When water changes from a liquid to a gas and then the steam condenses back to the liquid form, these types of changes are
physical
chemical
electrical
mechanical
- 10. Multiple Choice
Students took some ice cubes out of the freezer at 1:00 p.m. An hour later, they observed how the ice cubes had changed. The change is BEST described as
chemical because a liquid formed.
physical because it happened over time.
physical because no new substance was formed.
Chemical because heat caused the change.
- 11. Multiple Choice
Which best explains what will happen to the particles in a liquid when heat is removed?
Motion of the particles will immediately stop.
Motion of the particles will not change.
Motion of the particles will slow down.
Motion of the particles will speed up.
- 12. Multiple Choice
Which basic units of matter have the same properties as an element?
protons
electrons
atoms
neutrons
- 13. Multiple Choice
The ice cubes in a freezer are melting. Which change MOST likely is causing the ice cubes to melt?
a decrease in the mass of the ice cubes
an increase in the mass of the ice cubes
a decrease in the temperature inside the freezer
an increase in the temperature inside the freezer
- 14. Multiple Choice
A student tried to twist a metal lid off a glass jar without success. The student then placed the metal lid under hot running water and was able to remove the lid. Which best describes why the student was able to remove the lid?
The molecules in the glass jar were heated and moved toward the lid.
The molecules in the lid were heated and expanded away from the jar.
The contents in the jar were heated and moved away from the top of the lid.
The air surrounding the jar was heated and moved away from the sides of the jar.
- 15. Multiple Choice
Which does 12.0 grams represent?
mass
volume
speed
force
- 16. Multiple Choice
Which changes when a solid becomes a liquid?
number of atoms present
movement of the atoms
color of the atoms
mass of the atoms
- 17. Multiple Choice
In order to determine if two atoms are copper (Cu) atoms, what must be the same for each?
the number of valence electrons
the number of protons
the charge of the atom
the size of the atom
- 18. Multiple Choice
What has occurred when bubbles form in a liquid that is being heated?
Oxygen has been absorbed from air.
Heat has radiated through the liquid.
Boiling point has been reached.
Molecular stability has increased.
- 19. Multiple Choice
A student conducted an experiment with a chamber filled with nitrogen gas. During the experiment, a change in motion of the atoms of the nitrogen occurs as shown in the figure below.What action by the student could have caused this change in atomic motion?
She spun the chamber in a centrifuge.
She placed the chamber in an ice bath.
She heated the chamber with a Bunsen burner.
She added more nitrogen gas into the Chamber.
- 20. Multiple Choice
What does the symbol in the diagram represent?
a compound
an element
a molecule
an isotope
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