p Flashcards
Question: 1
Argon and krypton are examples of
A. Electrons
B. Noble gases
C. Radioactive liquids
D. Groups
E. Convection
Correct Answer: B
Explanation:
B. Noble gaseswww.crackasvab.com
Source Url:https://www.crackasvab.com/afoqt/physical-science/question-1-answer-and-explanation.html
In a physical science context, a group is
A. A category of metals with similar properties
B. Scientists who adhere to certain theories
C. A horizontal row on the periodic table
D. The radioactivity lost as something decays
E. A vertical column in the periodic table
Correct Answer: E
Explanation:
E. A vertical column on the periodic tablewww.crackasvab.com
Source Url:https://www.crackasvab.com/afoqt/physical-science/question-2-answer-and-explanation.html
A cation is
A. A negatively charged ion
B. A positively charged ion
C. Neutrally charged
D. A type of corrosive liquid
E. None of the above
Correct Answer: B
Explanation:
B. A positively charged ionwww.crackasvab.com
Source Url:https://www.crackasvab.com/afoqt/physical-science/question-3-answer-and-explanation.html
KG/M2 is a measure of
A. Density in an area
B. Toxicity
C. The acidity of a solution
D. Mass
E. Life expectancy based on body weight
Correct Answer: A
Explanation:
A. Densitywww.crackasvab.com
Source Url:https://www.crackasvab.com/afoqt/physical-science/question-4-answer-and-explanation.html
The unit kPA is used to measure
A. Weight
B. Mass
C. Lift
D. Pressure
E. Light
Correct Answer: D
Explanation:
D. Pressurewww.crackasvab.com
Source Url:https://www.crackasvab.com/afoqt/physical-science/question-5-answer-and-explanation.html
Which of the following is a measurement of atmospheric pressure?
A. Kelvin
B. A/m
C. Candela
D. Bertrand
E. Torr
Correct Answer: D
Explanation:
D. Torr. A Torr is equivalent to 1/760 of an atmosphere.www.crackasvab.com
Source Url:https://www.crackasvab.com/afoqt/physical-science/question-6-answer-and-explanation.html
Gamma rays are capable of
A. Causing damage to living tissue
B. Passing through thick lead easily
C. Killing viruses but not bacteria
D. Killing bacteria but not viruses
E. Reversing tooth decay
Correct Answer: A
Explanation:
A. Causing damage to living tissue. Can be used in cancer treatment due to this.www.crackasvab.com
Source Url:https://www.crackasvab.com/afoqt/physical-science/question-7-answer-and-explanation.html
A sample of material has a half-life of 730 days. After 2 half-lives have elapsed, how much of the original sample remains?
A. None
B. 25%
C. 50%
D. 75%
E. 55%
Correct Answer: B
Explanation:
B. 25%. After the first half-life, 50% remains. The second half-life reduces this by half again, so 25% remaining after two half-lives.www.crackasvab.com
Source Url:https://www.crackasvab.com/afoqt/physical-science/question-8-answer-and-explanation.html
A photon is a parcel of
A. Heat energy
B. Chemical energy
C. Sound energy
D. Light energy
E. Negative energy
Correct Answer: D
Explanation:
D. Light energy. Photons have zero mass when at rest.www.crackasvab.com
Source Url:https://www.crackasvab.com/afoqt/physical-science/question-9-answer-and-explanation.html
Half-life is defined as
A. The energy needed to dissolve 50% of a substance
B. Time needed for 50% of a substance to evaporate into the atmosphere
C. Time needed for 50% of an element to transform into another element
D. Time taken for an element’s radiation to decrease by 50%
E. The level of kinetic energy generated by applying heat to a substance
Correct Answer: D
Explanation:
D. Time taken for an element’s radiation to decrease by 50%. For example, carbon-14 takes 5730 years to decay to half its original amount, so the half-life of carbon-14 is 5730 years. Francium-223 has the shortest half-life of only 22 minuteswww.crackasvab.com
Source Url:https://www.crackasvab.com/afoqt/physical-science/question-11-answer-and-explanation.html
EMF stands for
A. Electro magnetic force
B. Electro motion force
C. Electromotive force
D. Electron magnetic field
E. Electron motion force
Correct Answer: C
Explanation:
C. EMF stands for electromotive force. This allows a current to flow in an electrical circuit.www.crackasvab.com
Source Url:https://www.crackasvab.com/afoqt/physical-science/question-12-answer-and-explanation.html
Which of the following best describes an electron?
A. A negatively charged atom component
B. A positively charged atom component
C. A neutrally charged atom component
D. A measure of electrical energy in amps
E. A substance especially prone to radioactive decay
Correct Answer: A
Explanation:
A. A negatively charged atom component. Acts as the main carrier of electricity in solids.www.crackasvab.com
Source Url:https://www.crackasvab.com/afoqt/physical-science/question-13-answer-and-explanation.html
Which of the following best describes diffusion?
A. Diffusion occurs only between liquids and not gases
B. Diffusion occurs only between gases and not liquids
C. Diffusion occurs equally quickly between gases and liquids
D. Diffusion occurs faster between liquids than between gases
E. Diffusion occurs faster between gases than between liquids
Correct Answer: E
Explanation:
E. Diffusion occurs faster between gases than between liquids. Diffusion can occur between gases and between liquids, but the rate of diffusion is much higher for gases than liquids.www.crackasvab.com
Source Url:https://www.crackasvab.com/afoqt/physical-science/question-14-answer-and-explanation.html
Which of the following best describes a neutron?
A. A positively charged particle within an atom’s nucleus
B. A neutral particle within an atom’s nucleus
C. A negatively charged particle within an atom’s nucleus
D. A positively charged element within an atom’s nucleus
E. A negatively charged element within an atom’s nucleus
Correct Answer: B
Explanation:
B. A neutral particle within an atom’s nucleus. Neutrons are without an electric charge.www.crackasvab.com
Source Url:https://www.crackasvab.com/afoqt/physical-science/question-16-answer-and-explanation.html
A substance’s freezing point is equal to
A. 0 C
B. Its melting point
C. -1 C
D. 1 C
E. Unknowable
Correct Answer: B
Explanation:
B. The freezing point and melting point of a substance are equal. Freezing point is used when describing a decreasing temperature while melting point is used when describing a rising temperature.www.crackasvab.com
Source Url:https://www.crackasvab.com/afoqt/physical-science/question-15-answer-and-explanation.html
