Quarter 2 Exam - Physical Science - Part 1 Question Preview (ID: 34246)


Physical Science Exam. TEACHERS: click here for quick copy question ID numbers.

The natural gas that you burn in a stove or furnace is composed primarily of methane, a molecule with one carbon atom (C), and four hydrogen atoms (H). What is the chemical formula of methane?
a) CH4
b) C4H1
c) C1H4
d) 4H1C

Plants manufacture glucose for food. If the chemical formula for glucose is C6H12O6, how many atoms are in a molecule of glucose?
a) 12
b) 24
c) 18
d) 3

A molecule is composed of atoms that all pull on electrons with the same strength. Will this molecule be nonpolar?
a) yes
b) no
c)
d)

Carbon disulfide will not dissolve in water. Is it made of ionic molecules, polar molecules, or nonpolar molecules?
a) ionic molecules
b) polar molecules
c) nonpolar molecules
d)

What is responsible for the fact that, unlike virtually any other substance in the world, solid water (ice) is lighter than an equal volume of liquid water?
a) Hydrogen bonding
b) Atmospheric Pressure
c) Global Warming
d) Electrolysis

If a substance does not dissolve in water, it most likely _______________.
a) ionic
b) polar
c) nonpolar
d)

Is hard water the result of a city’s water treatment process?
a) yes
b) no
c)
d)

If a substance dissolves in water, will it dissolve in vegetable oil, a nonpolar substance?
a) yes
b) no
c)
d)

An important component of gasoline is octane, which is composed of molecules that have eight carbon atoms (C) and eighteen hydrogen atoms (H). What is the chemical formula of octane?
a) A. Carbonhydoctane
b) B. C8H18
c) C. Octane-26
d)

A sample of water is taken randomly from earth’s hydrosphere. What kind of water (freshwater or saltwater) is it most likely to be?
a) saltwater
b) freshwater
c)
d)

What is the largest source of liquid freshwater on the planet?
a) Lakes and Rivers
b) Groundwater
c) Oceans
d) Soil Moisture

If a lake has no means of getting rid of water except evaporation, which does it contain?
a) Saltwater
b) Freshwater
c)
d)

If no energy is added to air, what happens to the temperature when the air expands?
a) It will increase
b) It will Decrease
c) Nothing will happen
d)

_____27. What do the salinity levels of the oceans tell us about the age of the earth?
a) It is older than we thought
b) It cannot be millions of years old.
c) Nothing
d)

What have scientists observed in order to learn about earth’s interior?
a) seismic waves
b) cosmic rays
c) x-rays
d) ocean waves

What causes the earth’s magnetic field?
a) The flow of electricity in the inner core
b) The flow of plastic rock in the mantle
c) The flow of plastic rock in the asthenosphere
d) The flow of electricity in the outer core

What two theories attempt to explain the earth’s magnetic field?
a) Dynamo and Electromagnetic Decay
b) Rapid Decay and Dynamo
c) Electromagnetic Decay and Rapid Relay
d) Rapid Relay and Dynamo

Which theory is the most scientifically valid?
a) Dynamo
b) Rapid Decay
c) Electromagnetic Decay
d) Rapid Relay

If a region of the earth has a lot of volcanic activity, what two kinds of mountains do you expect to find there? A. Folded and Domed B. Volcanic and Domed C. Domed and Folded D. Fault Block and Volcanic
a) Folded and Domed
b) Volcanic and Domed
c) Domed and Folded
d) Fault Block and Volcanic

What is Pangaea?
a) A disease
b) a theory of evolution
c) A restaurant
d) A theoretical Supercontinent

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