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Practice Quiz
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1An hypothesis can always be proven.
A)True
B)False


2Chemical compounds are composed of two or more atoms or ions chemically bonded together.
A)True
B)False


3A theory
A)Is based on observations
B)Can explain why something happens
C)Can be disproved
D)All of the above


4The nucleus of an atom has which of the following?
A)Proton
B)Neutron
C)Electron
D)Proton and Neutron


5pH is a measure of the
A)Hydrogen ion concentration
B)Hydroxide ion concentration
C)Number of protons in a molecule
D)Number of electrons in a molecule


6Chemical reactions that release heat are called
A)Endothermic
B)Exothermic
C)Catalyzed
D)All of the above


7Photosynthesis occurs in
A)Animals
B)Plants
C)people
D)all of the above


8Heat is a form of energy.
A)True
B)False


9Pollution is often created as a byproduct of energy conversion.
A)True
B)False


10A gasoline-powered automobile engine is more efficient than a diesel-powered engine.
A)True
B)False


11The first law of thermodynamics states that
A)Chemical bonds create heat
B)Atoms are composed of moving particles
C)Energy can neither be created nor destroyed
D)Energy is lost when converting from one form to another


12Processed plant biomass can be used to fuel automobiles.
A)True
B)False





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