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Second Semester Practice II
Test Description: Review
Instructions: Answer all questions to get your test result.
1) A scientist knows that a pure substance has six protons in the nucleus of each of its atoms. Which of the following can the scientist conclude?
A
The pure substance has a negative charge
B
The pure substance can be identified as a metal.
C
substance can be identified as a specific element.
D
The pure substance has a positive charge.
2) In the electron cloud model of the atom, what does the electron cloud contain?
A
electrons and a little empty space
B
electrons and a lot of empty space
C
electrons and protons
D
electrons and neutrons
3) What particle in an atom's nucleus has no charge?
A
newton
B
electron
C
neutron
D
proton
4) Which measurement changes when an object is taken from Earth to the moon?
A
volume
B
density
C
weight
D
mass
5) A chemical change differs from a physical change because in a chemical change a substance
A
changes into another substance.
B
changes into another state of matter
C
changes shape
D
changes color.
6) Which choice below best describes water vapor?
A
gas with electric charges that comes from heating water
B
gas above boiling water
C
particles of water under extreme pressure
D
little drops of condensed water found on glasses of iced drinks in the summer
7) When a substances particles are moderately spread apart and can slide past each other, what state of matter is the substance.
A
liquid
B
gas
C
solid
D
plasma
8) A metalworker takes a piece of copper and shapes it by pounding it with a hammer. Which of the following best describes the property the metalworker used?
A
The copper is malleable, which is a chemical property.
B
The copper is ductile, which is a chemical property.
C
The copper is ductile, which is a physical property.
D
The copper is malleable, which is a physical property.
9) One container (A) has liquid with an object at the bottom, another (B) has the same liquid but an object is at the top. What can you determine about the density of the objects?
A
Container A's object is denser than B's.
B
The density of the objects are the same.
C
Container B's object is denser than As.
D
You cannot compare the two without more information
10) The amount of space an object takes up is its
A
mass
B
height
C
density
D
volume
11) A substance's melting point is the same as its
A
freezing point.
B
chemical point
C
evaporation point.
D
boiling point.
12) How is plasma different from gas?
A
The particles in plasma can break away from each other.
B
The particles in plasma have electric charges.
C
The particles in plasma have a set volume.
D
The particles in plasma are magnetic.
13) In which state of matter do particles move the slowest?
A
plasma
B
gas
C
solid
D
liquid
14) Which statement describes a chemical property of an object?
A
Copper is a conductor.
B
Water is colorless.
C
Wood is flammable.
D
Iron is malleable.
15) Which object has the greatest density?
A
twenty kilograms of cement
B
twenty kilograms of paperclips
C
twenty kilograms of plastic bottles
D
twenty kilograms of feathers
16) What physical property of matter can you measure with cubic centimeters?
A
volume
B
density
C
mass
D
length
17) When does hail form?
A
when the temperature directly beneath clouds is freezing
B
when wind tosses ice crystals up and down inside cumulonimbus clouds
C
when rain falls through a thick layer of freezing air that freezes the rain
D
when rain falls through cold air and then freezes upon hitting Earth's surface
18) A volcanic eruption can change the climate by
A
making Earth warmer by burning the Earth's surface with ash and lava
B
making Earth cooler by blocking sunlight with ash and other materials.
C
making Earth warmer by trapping heat on Earth's surface.
D
making Earth cooler by increasing the amount of oxygen
19) Why do meteorologists use satellites to help them predict the weather?
A
The satellites can use radio waves to measure wind speed and precipitation to map storm paths.
B
The satellites can gather information about weather conditions all over the world at the same time.
C
The satellites can gather information about specific, local weather conditions.
D
The satellites are the only weather instruments that can quickly gather information from the troposphere.
20) If an air mass forms over a desert in the southern United States, what will its temperature and moisture be like?
A
The air mass will be cool and dry.
B
The air mass will be hot and dry.
C
The air mass will be hot and moist.
D
The air mass will be cool and moist.
*select an answer for all questions
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