PAX Exam Science Practice Test with Answer Explanations
autotroph
1. An organism with chloroplast in its cell is
probably a
2. autotrophs are organisms that produce their own
food from inorganic substances, plants
are autotrophs
3. heterotrophs obtain their food by consuming plants or
other animals. They are also referred to
as consumers.
, PAX Exam Science Practice Test with Answer Explanations
Primary consumers may be herbivores
4. herbivores plant eaters
5. omnivores plant and meat eaters
6. Secondary consumers are carnivores, meat eaters, or omni-
vores that eat herbivores.
7. Tertiary consumers are carnivores that eat other carnivores or omnivores.
8. What property of water allows someone to surface tension
fill a glass slightly above the rim without the Water molecules are polar. This is due
water flowing over? to the fact that oxygen draws the elec-
trons in the molecule toward itself. Thus,
there is a negative charge surrounding
the oxygen and a positive charge around
the hydrogen. The unbalanced charges
, PAX Exam Science Practice Test with Answer Explanations
cause the water molecules to cluster, and
this gives the water the properties called
surface tension. Surface tension is the
the attraction between molecules at the
surface of a liquid, which allows a glass to
be filled above the rim without the water
flowing over.
9. The gap between the neurons are called synapses
10. Which group of chemicals are not normally silicates
found in most living things? Carbohydrates, proteins and nucleic
acids (RNA and DNA) are all very impor-
tant chemicals in living things.
Silicates examples are in sand and glass
11. The alimentary canal is associated with the the whole passage along which food
passes through the body from mouth to
anus. It includes the esophagus, stom-
ach, and intestines.
digestive tract
12. The numerous villi in the small intestine provide greater surface area for absorp-
serve to tion
13. refraction
, PAX Exam Science Practice Test with Answer Explanations
As light passes obliquely from air to water, it refraction is the bending of light as it
is bent. The bending is called passes obliquely from one medium to
another, in this case from air to water. The
speed of light wave changes changes
when it changes media. When the light
wave enters the second medium at an
oblique angle, it changes direction; the
light wave is bent.
14. diffraction refers to the spreading of light waves as
they pass through a narrow opening
15. reflection occurs when light bounces ott an object.
16. dispersion occurs when light is separated into its
spectrum
17. Which of the following organelles is not in- mitochondrion
volved in protein synthesis?
18. To be absorbed by cells, proteins must be amino acids
changed into
19. A neuron that transmits impulses from the a sensory neuron
receptors to the spinal cord is called
20. Potential energy can be thought of a func- or at the bottom of the incline.
tion of height. Since total energy is always
conserved, the kinetic energy is at its maxi-
mum when the potential is at its minimum.
autotroph
1. An organism with chloroplast in its cell is
probably a
2. autotrophs are organisms that produce their own
food from inorganic substances, plants
are autotrophs
3. heterotrophs obtain their food by consuming plants or
other animals. They are also referred to
as consumers.
, PAX Exam Science Practice Test with Answer Explanations
Primary consumers may be herbivores
4. herbivores plant eaters
5. omnivores plant and meat eaters
6. Secondary consumers are carnivores, meat eaters, or omni-
vores that eat herbivores.
7. Tertiary consumers are carnivores that eat other carnivores or omnivores.
8. What property of water allows someone to surface tension
fill a glass slightly above the rim without the Water molecules are polar. This is due
water flowing over? to the fact that oxygen draws the elec-
trons in the molecule toward itself. Thus,
there is a negative charge surrounding
the oxygen and a positive charge around
the hydrogen. The unbalanced charges
, PAX Exam Science Practice Test with Answer Explanations
cause the water molecules to cluster, and
this gives the water the properties called
surface tension. Surface tension is the
the attraction between molecules at the
surface of a liquid, which allows a glass to
be filled above the rim without the water
flowing over.
9. The gap between the neurons are called synapses
10. Which group of chemicals are not normally silicates
found in most living things? Carbohydrates, proteins and nucleic
acids (RNA and DNA) are all very impor-
tant chemicals in living things.
Silicates examples are in sand and glass
11. The alimentary canal is associated with the the whole passage along which food
passes through the body from mouth to
anus. It includes the esophagus, stom-
ach, and intestines.
digestive tract
12. The numerous villi in the small intestine provide greater surface area for absorp-
serve to tion
13. refraction
, PAX Exam Science Practice Test with Answer Explanations
As light passes obliquely from air to water, it refraction is the bending of light as it
is bent. The bending is called passes obliquely from one medium to
another, in this case from air to water. The
speed of light wave changes changes
when it changes media. When the light
wave enters the second medium at an
oblique angle, it changes direction; the
light wave is bent.
14. diffraction refers to the spreading of light waves as
they pass through a narrow opening
15. reflection occurs when light bounces ott an object.
16. dispersion occurs when light is separated into its
spectrum
17. Which of the following organelles is not in- mitochondrion
volved in protein synthesis?
18. To be absorbed by cells, proteins must be amino acids
changed into
19. A neuron that transmits impulses from the a sensory neuron
receptors to the spinal cord is called
20. Potential energy can be thought of a func- or at the bottom of the incline.
tion of height. Since total energy is always
conserved, the kinetic energy is at its maxi-
mum when the potential is at its minimum.
