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Practice Quiz
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1

An hypothesis can always be proven.
A)True
B)False
2

Chemical compounds are composed of two or more atoms or ions chemically bonded together.
A)True
B)False
3

A theory
A)Is based on observations
B)Can explain why something happens
C)Can be disproved
D)All of the above
4

The nucleus of an atom has which of the following?
A)Proton
B)Neutron
C)Electron
D)Proton and Neutron
5

pH 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
6

Chemical reactions that release heat are called
A)Endothermic
B)Exothermic
C)Catalyzed
D)All of the above
7

Photosynthesis occurs in
A)Animals
B)Plants
C)people
D)all of the above
8

Heat is a form of energy.
A)True
B)False
9

Pollution is often created as a byproduct of energy conversion.
A)True
B)False
10

A gasoline-powered automobile engine is more efficient than a diesel-powered engine.
A)True
B)False
11

The 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
12

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





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