GED Science Exam Questions and
Answers Graded A+
acceleration - Correct answer-an increase in rate of change
acid - Correct answer-any substance that in water solution tastes sour, changes the
color of certain indicators, reacts with some metals to liberate hydrogen, reacts
with bases to form salts, and promotes certain chemical reactions
acid rain - Correct answer-rainfall that is more acidic than normal because of air
pollution
activation energy - Correct answer-the energy that an atomic system must acquire
before a process (such as an emission or reaction) can occur
adaptation - Correct answer-the process of adjusting or conforming to new
conditions
adequacy - Correct answer-the quality of being able to meet a need satisfactorily
air mass - Correct answer-a large body of air throughout which temperature and
moisture content are similar
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,alimentary canal - Correct answer-digestive tube that extends from the mouth to
the anus
alveolus - Correct answer-tiny air sac in the lung
amplitude - Correct answer-greatness of size or range; magnitude
antibody - Correct answer-a protein that produces an immune response
aorta - Correct answer-the large artery carrying blood from the heart to the body
artery - Correct answer-a blood vessel that carries blood away from the heart to the
body
assess - Correct answer-to evaluate
asteroid - Correct answer-any of numerous small celestial bodies composed of rock
and metal
atmosphere - Correct answer-the envelope of gases surrounding the Earth or
another planet
atom - Correct answer-Basic unit of matter
atomic mass - Correct answer-the property of an atom that causes it to have weight;
protons + neutrons
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, atomic number - Correct answer-quantity of protons in the nucleus or an atom of
an element
atrium - Correct answer-a chamber connected to other chambers or passageways
(such as the heart)
base - Correct answer-lowest support of a structure
Big Bang Theory - Correct answer-the theory that the universe originated in a huge
explosion that released all matter and energy about 20 billion years ago
biomass - Correct answer-the total amount of living matter in a given unit area
boiling point - Correct answer-the temperature at which a liquid changes to a gas
boson - Correct answer-an elementary particle that obeys Bose-Einstein statistics
bronchus - Correct answer-one of the two tubes that connect the lungs with the
trachea
bronchiole - Correct answer-the smallest of the tubes in the lungs
capillary - Correct answer-smallest blood vessel
carbohydrate - Correct answer-compound made up of carbon, hydrogen, and
oxygen atoms; major source of energy for the human body
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Answers Graded A+
acceleration - Correct answer-an increase in rate of change
acid - Correct answer-any substance that in water solution tastes sour, changes the
color of certain indicators, reacts with some metals to liberate hydrogen, reacts
with bases to form salts, and promotes certain chemical reactions
acid rain - Correct answer-rainfall that is more acidic than normal because of air
pollution
activation energy - Correct answer-the energy that an atomic system must acquire
before a process (such as an emission or reaction) can occur
adaptation - Correct answer-the process of adjusting or conforming to new
conditions
adequacy - Correct answer-the quality of being able to meet a need satisfactorily
air mass - Correct answer-a large body of air throughout which temperature and
moisture content are similar
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,alimentary canal - Correct answer-digestive tube that extends from the mouth to
the anus
alveolus - Correct answer-tiny air sac in the lung
amplitude - Correct answer-greatness of size or range; magnitude
antibody - Correct answer-a protein that produces an immune response
aorta - Correct answer-the large artery carrying blood from the heart to the body
artery - Correct answer-a blood vessel that carries blood away from the heart to the
body
assess - Correct answer-to evaluate
asteroid - Correct answer-any of numerous small celestial bodies composed of rock
and metal
atmosphere - Correct answer-the envelope of gases surrounding the Earth or
another planet
atom - Correct answer-Basic unit of matter
atomic mass - Correct answer-the property of an atom that causes it to have weight;
protons + neutrons
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
, atomic number - Correct answer-quantity of protons in the nucleus or an atom of
an element
atrium - Correct answer-a chamber connected to other chambers or passageways
(such as the heart)
base - Correct answer-lowest support of a structure
Big Bang Theory - Correct answer-the theory that the universe originated in a huge
explosion that released all matter and energy about 20 billion years ago
biomass - Correct answer-the total amount of living matter in a given unit area
boiling point - Correct answer-the temperature at which a liquid changes to a gas
boson - Correct answer-an elementary particle that obeys Bose-Einstein statistics
bronchus - Correct answer-one of the two tubes that connect the lungs with the
trachea
bronchiole - Correct answer-the smallest of the tubes in the lungs
capillary - Correct answer-smallest blood vessel
carbohydrate - Correct answer-compound made up of carbon, hydrogen, and
oxygen atoms; major source of energy for the human body
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
