PRAXIS 5005 Science ETS Practice Test Exam with Questions and Answers – 100%
Solved
A neutral atom becomes a positive ion when it loses one or more
A.electrons
B.neutrons
C.protons
D.nuclei - ✔✔✔-A.electrons
Protons are positively charged, and electrons are negatively charged. A neutral atom has the
same number of protons and electrons. A neutral atom becomes a positive ion when it loses
one or more electrons, resulting in the ion having more positive charges than negative charges.
A teacher rubs an inflated balloon with a wool cloth and then holds the balloon over bits of
paper that are lying on a table. The students in the class watch as the bits of paper rise from the
table toward the balloon. Which of the following hypotheses is best supported by the observed
interaction between the balloon and the bits of paper?
A.The balloon contains helium.
B.The balloon is unaffected by gravity.
C.The balloon has an electrostatic charge.
D.The balloon weighs more than the bits of paper do. - ✔✔✔-C.The balloon has an electrostatic
charge.
The attraction of the bits of paper to the balloon is best explained by the hypothesis that the
balloon has an electrostatic charge. Rubbing the balloon with a wool cloth transferred electrons
from the wool to the balloon, resulting in an electrostatic charge on the balloon's surface.
Holding the charged balloon over the bits of paper induced a rearrangement of charges within
the paper, resulting in positively charged areas in the bits of paper that caused them to be
attracted to the negatively charged balloon.
,PRAXIS 5005 Science ETS Practice Test Exam with Questions and Answers – 100%
Solved
An animal is found to have the following characteristics.
>It has a backbone.
>It has soft, moist skin covered by a slippery layer of mucus.
>It goes through complete metamorphosis in its life cycle.
>It lives part of its life in water and part of its life on land.
To which of the following groups does the animal most likely belong?
A.Amphibians
B.Insects
C.Mammals
D.Reptiles - ✔✔✔-A.Amphibians
The characteristics presented are typical of frogs. Frogs belong to the class Amphibia, which also
includes toads and salamanders.
An object is moving in a straight line at a constant speed. What will happen if a constant force is
then applied to the object in the same direction in which the object is moving?
A.The object will stop moving.
B.The object will continue moving in the same direction but will slow down.
C.The object will continue moving in the same direction but will speed up.
D.The object will move in the opposite direction but at the same speed as before. - ✔✔✔-C.The
object will continue moving in the same direction but will speed up.
When a constant force is applied to the object in the same direction in which the object is
moving, the object will accelerate in that direction.
, PRAXIS 5005 Science ETS Practice Test Exam with Questions and Answers – 100%
Solved
As a rock begins tumbling down a hillside, most of its gravitational potential energy is converted
into
A.kinetic energy
B.thermal energy
C.chemical energy
D.nuclear energy - ✔✔✔-A.kinetic energy
Kinetic energy is the energy of motion. As the rock begins moving down the hillside under the
influence of gravity, most of the rock's gravitational potential energy is converted into kinetic
energy.
As part of a unit on plate tectonics, students use various materials to construct physical models
of Earth's layered structure. The students will use the models to explore how the separate
plates of the lithosphere, Earth's solid outer layer, move over the asthenosphere, the partially
molten upper portion of Earth's mantle, over geologic time.
Based on the description provided, which of the following materials would best represent the
asthenosphere?
A.Paper that is thin, delicate, and easily punctured
B.A solid wood block that has a rough and uneven surface
C.Soft wax that can bend or stretch without breaking
D.A piece of stainless steel that is rigid and impermeable - ✔✔✔-C.Soft wax that can bend or
stretch without breaking
Solved
A neutral atom becomes a positive ion when it loses one or more
A.electrons
B.neutrons
C.protons
D.nuclei - ✔✔✔-A.electrons
Protons are positively charged, and electrons are negatively charged. A neutral atom has the
same number of protons and electrons. A neutral atom becomes a positive ion when it loses
one or more electrons, resulting in the ion having more positive charges than negative charges.
A teacher rubs an inflated balloon with a wool cloth and then holds the balloon over bits of
paper that are lying on a table. The students in the class watch as the bits of paper rise from the
table toward the balloon. Which of the following hypotheses is best supported by the observed
interaction between the balloon and the bits of paper?
A.The balloon contains helium.
B.The balloon is unaffected by gravity.
C.The balloon has an electrostatic charge.
D.The balloon weighs more than the bits of paper do. - ✔✔✔-C.The balloon has an electrostatic
charge.
The attraction of the bits of paper to the balloon is best explained by the hypothesis that the
balloon has an electrostatic charge. Rubbing the balloon with a wool cloth transferred electrons
from the wool to the balloon, resulting in an electrostatic charge on the balloon's surface.
Holding the charged balloon over the bits of paper induced a rearrangement of charges within
the paper, resulting in positively charged areas in the bits of paper that caused them to be
attracted to the negatively charged balloon.
,PRAXIS 5005 Science ETS Practice Test Exam with Questions and Answers – 100%
Solved
An animal is found to have the following characteristics.
>It has a backbone.
>It has soft, moist skin covered by a slippery layer of mucus.
>It goes through complete metamorphosis in its life cycle.
>It lives part of its life in water and part of its life on land.
To which of the following groups does the animal most likely belong?
A.Amphibians
B.Insects
C.Mammals
D.Reptiles - ✔✔✔-A.Amphibians
The characteristics presented are typical of frogs. Frogs belong to the class Amphibia, which also
includes toads and salamanders.
An object is moving in a straight line at a constant speed. What will happen if a constant force is
then applied to the object in the same direction in which the object is moving?
A.The object will stop moving.
B.The object will continue moving in the same direction but will slow down.
C.The object will continue moving in the same direction but will speed up.
D.The object will move in the opposite direction but at the same speed as before. - ✔✔✔-C.The
object will continue moving in the same direction but will speed up.
When a constant force is applied to the object in the same direction in which the object is
moving, the object will accelerate in that direction.
, PRAXIS 5005 Science ETS Practice Test Exam with Questions and Answers – 100%
Solved
As a rock begins tumbling down a hillside, most of its gravitational potential energy is converted
into
A.kinetic energy
B.thermal energy
C.chemical energy
D.nuclear energy - ✔✔✔-A.kinetic energy
Kinetic energy is the energy of motion. As the rock begins moving down the hillside under the
influence of gravity, most of the rock's gravitational potential energy is converted into kinetic
energy.
As part of a unit on plate tectonics, students use various materials to construct physical models
of Earth's layered structure. The students will use the models to explore how the separate
plates of the lithosphere, Earth's solid outer layer, move over the asthenosphere, the partially
molten upper portion of Earth's mantle, over geologic time.
Based on the description provided, which of the following materials would best represent the
asthenosphere?
A.Paper that is thin, delicate, and easily punctured
B.A solid wood block that has a rough and uneven surface
C.Soft wax that can bend or stretch without breaking
D.A piece of stainless steel that is rigid and impermeable - ✔✔✔-C.Soft wax that can bend or
stretch without breaking
