GED Science Test (2024/2025)
1. Abiogenesis Belief that livings things may develop from lifeless matter
2. Acid A compound that In water produces hydrogen ions, usu-
ally tastes sour, a pH less than 7
3. Acid rain rain containing acids that form in the atmosphere when
industrial gas emissions (especially sulfur dioxide and
nitrogen oxides) combine with water
4. Alloy Homogenous mixture composed of two or more metals
5. Amoeba A type of Protozoan that has no permanent shape
6. Amorphous having no definite form or distinct shape
7. Amplitude The maximum value of a wave or vibration
8. Anaerobic respi- Fermentation, or respiration in the absence of oxygen
ration
9. Anemia lack of a normal number of red blood cells
10. Anode Positive electrode of an electrolytic cell; negative terminal
of a battery; negative plate of a vacuum tube; site where
oxidation occurs
11. Antibiotic compound that blocks the growth and reproduction of
bacteria
12. Antibody A protein, usually in the blood of an organism, that serves
to counteract the effects of disease-producing bacteriabor
viruses
13. Antidote a remedy that stops or controls the effects of a poison
14. Anticeptic A substance that prevents the growth or activity of bacte-
ria
15. Antitoxin Substance in the body neutralizes toxins
, GED Science Test (2024/2025)
16. Appendix Wormlike, narrow part of the alimentary canal, in the
lower right-hand part of the human abdomen
17. Armature A piece of metal or a coil of wire that moves back and
forth, or rotates, in a magnetic field
18. Artery a blood vessel that carries blood away from the heart to
the periphery of the body
19. Arthropods A group of organisms that have jointed appendages, an
exoskeleton, bilateral symmetry, and reproduce sexually;
insects, arachnids, millipedes and cenitpedes, and crus-
taceans
20. Ascorbic acid Vitamin C; found in citrus fruits, tomatoes, and green
vegetables
21. Aseptic Free of living bacteria
22. Asexual repro- Producing offspring without inion of individulaln or germ
duction cells
23. Assimilation Process by which digested food is utilized by the body to
build up or repair cells
24. Asteroid One of a group of "minor plants" between Mars and
Jupiter, of which about 1,500 are known
25. Atmosphere The whole mass of gases surrounding a planet
26. Atom smallest particle of an element, consisting of a nucleus
surrounded bynelectrons
27. Atomic fission The breaking down of an atomic nucleus, into two or more
parts, with a great release of energy
28. Atomic fusion The joining of atomic nuclei to form heavier nuclei, such
as deuterium (heavy hydrogen) and tritium (another iso-
tope of hydrogen) to make helium, resulting in the release
of enormous quantities of energy
, GED Science Test (2024/2025)
29. Auricle An upper chamber of the heart thatnreceives blood from
the veins-also called the atrium
30. Autotroph Organism (a green plant) that nourishes itself by making
organic materials out of inorganic
31. Auxin a plant hormone that promotes root formation and bud
growth
32. Bacillus aerobic rod-shaped spore-producing bacterium
33. Bacteria (microbiology) single-celled or noncellular spherical or
spiral or rod-shaped organisms lacking chlorophyll that
reproduce by fission
34. Balance in Na- the balence of animals and palntes in their enviroment
ture
35. Barometer an instrument that measures atmospheric pressure
36. Basel Metabo- A term used to discribe the amount of energy the body
lism expends when in a inactive or basic (basal) state.
37. Base any of various water-soluble compounds capable of turn-
ing litmus blue and reacting with an acid to form a salt and
water
38. Bedrock solid unweathered rock lying beneath surface deposits of
soil
39. Benign Tumor a tumor that is not cancerous
40. Bile a digestive juice secreted by the liver and stored in the
gallbladder
41. Binomal Nomen- the naming system for organism in wich each organsim is
clature given a two part name-a genus name of different species
in an area
42. Biome
1. Abiogenesis Belief that livings things may develop from lifeless matter
2. Acid A compound that In water produces hydrogen ions, usu-
ally tastes sour, a pH less than 7
3. Acid rain rain containing acids that form in the atmosphere when
industrial gas emissions (especially sulfur dioxide and
nitrogen oxides) combine with water
4. Alloy Homogenous mixture composed of two or more metals
5. Amoeba A type of Protozoan that has no permanent shape
6. Amorphous having no definite form or distinct shape
7. Amplitude The maximum value of a wave or vibration
8. Anaerobic respi- Fermentation, or respiration in the absence of oxygen
ration
9. Anemia lack of a normal number of red blood cells
10. Anode Positive electrode of an electrolytic cell; negative terminal
of a battery; negative plate of a vacuum tube; site where
oxidation occurs
11. Antibiotic compound that blocks the growth and reproduction of
bacteria
12. Antibody A protein, usually in the blood of an organism, that serves
to counteract the effects of disease-producing bacteriabor
viruses
13. Antidote a remedy that stops or controls the effects of a poison
14. Anticeptic A substance that prevents the growth or activity of bacte-
ria
15. Antitoxin Substance in the body neutralizes toxins
, GED Science Test (2024/2025)
16. Appendix Wormlike, narrow part of the alimentary canal, in the
lower right-hand part of the human abdomen
17. Armature A piece of metal or a coil of wire that moves back and
forth, or rotates, in a magnetic field
18. Artery a blood vessel that carries blood away from the heart to
the periphery of the body
19. Arthropods A group of organisms that have jointed appendages, an
exoskeleton, bilateral symmetry, and reproduce sexually;
insects, arachnids, millipedes and cenitpedes, and crus-
taceans
20. Ascorbic acid Vitamin C; found in citrus fruits, tomatoes, and green
vegetables
21. Aseptic Free of living bacteria
22. Asexual repro- Producing offspring without inion of individulaln or germ
duction cells
23. Assimilation Process by which digested food is utilized by the body to
build up or repair cells
24. Asteroid One of a group of "minor plants" between Mars and
Jupiter, of which about 1,500 are known
25. Atmosphere The whole mass of gases surrounding a planet
26. Atom smallest particle of an element, consisting of a nucleus
surrounded bynelectrons
27. Atomic fission The breaking down of an atomic nucleus, into two or more
parts, with a great release of energy
28. Atomic fusion The joining of atomic nuclei to form heavier nuclei, such
as deuterium (heavy hydrogen) and tritium (another iso-
tope of hydrogen) to make helium, resulting in the release
of enormous quantities of energy
, GED Science Test (2024/2025)
29. Auricle An upper chamber of the heart thatnreceives blood from
the veins-also called the atrium
30. Autotroph Organism (a green plant) that nourishes itself by making
organic materials out of inorganic
31. Auxin a plant hormone that promotes root formation and bud
growth
32. Bacillus aerobic rod-shaped spore-producing bacterium
33. Bacteria (microbiology) single-celled or noncellular spherical or
spiral or rod-shaped organisms lacking chlorophyll that
reproduce by fission
34. Balance in Na- the balence of animals and palntes in their enviroment
ture
35. Barometer an instrument that measures atmospheric pressure
36. Basel Metabo- A term used to discribe the amount of energy the body
lism expends when in a inactive or basic (basal) state.
37. Base any of various water-soluble compounds capable of turn-
ing litmus blue and reacting with an acid to form a salt and
water
38. Bedrock solid unweathered rock lying beneath surface deposits of
soil
39. Benign Tumor a tumor that is not cancerous
40. Bile a digestive juice secreted by the liver and stored in the
gallbladder
41. Binomal Nomen- the naming system for organism in wich each organsim is
clature given a two part name-a genus name of different species
in an area
42. Biome
