Praxis 5005 Science form 3
The process by which a gas becomes a liquid is called
A.condensation
B.freezing
C.melting
D.reduction - answerD.reduction
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 - answerA.kinetic energy
Which of the following is the best example of an interaction between different biotic
factors in an ecosystem?
A.A caterpillar undergoing metamorphosis
B.A plant absorbing sunlight
C.A grazing animal eating plants
D.An icicle melting on a warm day - answerC.A grazing animal eating plants
A neutral atom becomes a positive ion when it loses one or more
A.electrons
B.neutrons
C.protons
D.nuclei - answerA.electrons
Which of the following best describes a galaxy?
A.A small celestial body composed of ice
B.A giant planet orbited by ten or more moons
C.A collection of planets revolving around a star
D.A large cluster of stars, dust, and gas - answerD.A large cluster of stars, dust, and
gas
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. -
answerc.The object will continue moving in the same direction but will speed up.
, Researchers found fossils of marine organisms in rock layers that are located high
above sea level. Which of the following conclusions is best supported by the
researchers' observations?
A.The fossils were transported to the research site by wind currents.
B.The rock layer in which the fossils were found is igneous rock.
C.The organisms from which the fossils were formed lived less than a hundred years
ago.
D.The area containing the rock layers was previously submerged under water. -
answerD.The area containing the rock layers was previously submerged under water.
During a total solar eclipse, the Moon is in which of the following phases?
A.New Moon
B.First quarter Moon
C.Full Moon
D.Third quarter Moon - answerA.New Moon
Which of the following best describes the type of chemical reaction that occurs when the
acid HClH C l is mixed with the base NaOHN a O H in a solution?
A.Combustion
B.Decomposition
C.Neutralization
D.Dehydration - answerC.Neutralization
The balanced chemical equation shown above represents a reaction between methane
( CH4CH4) and oxygen ( O2O2) that produces carbon dioxide ( CO2CO2) and water
( H2OH2O). Based on the balanced chemical equation, how many molecules of oxygen
react with each molecule of methane?
A.One
B.Two
C.Three
D.Four - answerB. TWO
Which of the following processes in a plant's life cycle involves the emergence of leaves
and roots from a seed?
A.Germination
B.Fertilization
C.Pollination
D.Flowering - answerA.Germination
On the periodic table, the elements lithium, sodium, and potassium are grouped
together in the first column. Based on their locations on the periodic table, which of the
following is most likely true about the elements lithium, sodium, and potassium?
A.They have the same atomic number.
B.They have the same atomic mass.
C.They have similar chemical properties.
D.They have similar melting points. - answerC.They have similar chemical properties.
The process by which a gas becomes a liquid is called
A.condensation
B.freezing
C.melting
D.reduction - answerD.reduction
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 - answerA.kinetic energy
Which of the following is the best example of an interaction between different biotic
factors in an ecosystem?
A.A caterpillar undergoing metamorphosis
B.A plant absorbing sunlight
C.A grazing animal eating plants
D.An icicle melting on a warm day - answerC.A grazing animal eating plants
A neutral atom becomes a positive ion when it loses one or more
A.electrons
B.neutrons
C.protons
D.nuclei - answerA.electrons
Which of the following best describes a galaxy?
A.A small celestial body composed of ice
B.A giant planet orbited by ten or more moons
C.A collection of planets revolving around a star
D.A large cluster of stars, dust, and gas - answerD.A large cluster of stars, dust, and
gas
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. -
answerc.The object will continue moving in the same direction but will speed up.
, Researchers found fossils of marine organisms in rock layers that are located high
above sea level. Which of the following conclusions is best supported by the
researchers' observations?
A.The fossils were transported to the research site by wind currents.
B.The rock layer in which the fossils were found is igneous rock.
C.The organisms from which the fossils were formed lived less than a hundred years
ago.
D.The area containing the rock layers was previously submerged under water. -
answerD.The area containing the rock layers was previously submerged under water.
During a total solar eclipse, the Moon is in which of the following phases?
A.New Moon
B.First quarter Moon
C.Full Moon
D.Third quarter Moon - answerA.New Moon
Which of the following best describes the type of chemical reaction that occurs when the
acid HClH C l is mixed with the base NaOHN a O H in a solution?
A.Combustion
B.Decomposition
C.Neutralization
D.Dehydration - answerC.Neutralization
The balanced chemical equation shown above represents a reaction between methane
( CH4CH4) and oxygen ( O2O2) that produces carbon dioxide ( CO2CO2) and water
( H2OH2O). Based on the balanced chemical equation, how many molecules of oxygen
react with each molecule of methane?
A.One
B.Two
C.Three
D.Four - answerB. TWO
Which of the following processes in a plant's life cycle involves the emergence of leaves
and roots from a seed?
A.Germination
B.Fertilization
C.Pollination
D.Flowering - answerA.Germination
On the periodic table, the elements lithium, sodium, and potassium are grouped
together in the first column. Based on their locations on the periodic table, which of the
following is most likely true about the elements lithium, sodium, and potassium?
A.They have the same atomic number.
B.They have the same atomic mass.
C.They have similar chemical properties.
D.They have similar melting points. - answerC.They have similar chemical properties.
