ASVAB General Science Test — Questions and Answers

Question 1: Which organelle is responsible for producing energy in the form of ATP in a cell?

Nucleus
Ribosome
Mitochondria (Correct answer)
Golgi apparatus

Correct answer: Mitochondria

Mitochondria are known as the powerhouses of the cell because they produce ATP through cellular respiration.

Question 2: What is the pH of a neutral solution at 25°C?

0
7 (Correct answer)
14
5

Correct answer: 7

A pH of 7 is considered neutral, with values below 7 being acidic and above 7 being basic.

Question 3: Which law states that energy cannot be created or destroyed, only transformed?

Newton's Second Law
Law of Conservation of Mass
First Law of Thermodynamics (Correct answer)
Boyle's Law

Correct answer: First Law of Thermodynamics

The First Law of Thermodynamics (conservation of energy) states that the total energy of an isolated system remains constant.

Question 4: What type of rock is formed from cooled magma or lava?

Sedimentary
Metamorphic
Igneous (Correct answer)
Limestone

Correct answer: Igneous

Igneous rock forms when molten rock (magma or lava) cools and solidifies.

Question 5: Which gas do plants absorb from the atmosphere during photosynthesis?

Oxygen
Nitrogen
Carbon dioxide (Correct answer)
Hydrogen

Correct answer: Carbon dioxide

Plants absorb carbon dioxide (CO₂) from the air and use it along with sunlight and water to produce glucose.

Question 6: What force keeps planets in orbit around the Sun?

Electromagnetic force
Nuclear force
Friction
Gravity (Correct answer)

Correct answer: Gravity

Gravity is the attractive force between masses that keeps planets in elliptical orbits around the Sun.

Question 7: Which part of the human brain controls balance and coordination?

Cerebrum
Medulla oblongata
Hypothalamus
Cerebellum (Correct answer)

Correct answer: Cerebellum

The cerebellum coordinates voluntary movements, balance, and fine motor skills.

Question 8: What is the smallest unit of an element that retains the chemical properties of that element?

Molecule
Atom (Correct answer)
Proton
Electron

Correct answer: Atom

An atom is the smallest particle of an element that still has the chemical characteristics of that element.

Question 9: Which type of electromagnetic radiation has the shortest wavelength?

Radio waves
Visible light
Infrared
Gamma rays (Correct answer)

Correct answer: Gamma rays

Gamma rays have the shortest wavelengths and highest frequencies in the electromagnetic spectrum.

Question 10: What is the process by which water vapor cools and changes into liquid water called?

Evaporation
Condensation (Correct answer)
Sublimation
Precipitation

Correct answer: Condensation

Condensation occurs when water vapor loses heat energy and changes into liquid water droplets.

Question 11: Which blood type is considered the universal donor?

AB positive
O negative (Correct answer)
A positive
B negative

Correct answer: O negative

O negative blood can be given to patients of any blood type because it lacks A, B, and Rh antigens.

Question 12: What is the chemical formula for table salt (sodium chloride)?

NaOH
Na₂O
NaCl (Correct answer)
KCl

Correct answer: NaCl

Sodium chloride (NaCl) is formed when one sodium atom bonds ionically with one chlorine atom.

Question 13: Which layer of Earth's atmosphere contains the ozone layer?

Troposphere
Mesosphere
Stratosphere (Correct answer)
Thermosphere

Correct answer: Stratosphere

The ozone layer is located in the stratosphere, roughly 15 to 35 kilometers above Earth's surface.

Question 14: What type of reproduction involves only one parent and produces genetically identical offspring?

Sexual reproduction
Cross-pollination
Asexual reproduction (Correct answer)
Fertilization

Correct answer: Asexual reproduction

Asexual reproduction requires only one parent, producing offspring that are genetic clones of the parent.

Question 15: According to Newton's Third Law of Motion, when one object exerts a force on another, the second object exerts a force that is:

Greater in the same direction
Equal in the opposite direction (Correct answer)
Smaller in the opposite direction
Greater in the opposite direction

Correct answer: Equal in the opposite direction

Newton's Third Law states that for every action there is an equal and opposite reaction.

Question 16: Which planet in our solar system has the most moons?

Jupiter
Saturn (Correct answer)
Uranus
Neptune

Correct answer: Saturn

Saturn has the most confirmed moons of any planet in our solar system, surpassing Jupiter in recent counts.

Question 17: What is the term for the amount of matter in an object?

Weight
Density
Volume
Mass (Correct answer)

Correct answer: Mass

Mass is the measure of the amount of matter in an object and does not change with location or gravity.

Question 18: Which type of wave requires a medium to travel through?

Light waves
Radio waves
Sound waves (Correct answer)
X-rays

Correct answer: Sound waves

Sound waves are mechanical waves that need a medium such as air, water, or solids to propagate.

Question 19: What is the powerhouse process that converts glucose and oxygen into energy, water, and carbon dioxide?

Photosynthesis
Fermentation
Transpiration
Cellular respiration (Correct answer)

Correct answer: Cellular respiration

Cellular respiration is the metabolic process that breaks down glucose in the presence of oxygen to produce ATP.

Question 20: What is the atomic number of carbon?

6 (Correct answer)
12
8
14

Correct answer: 6

Carbon has atomic number 6, meaning its nucleus contains 6 protons.

Question 21: Which of the following is a vector quantity?

Temperature
Mass
Speed
Velocity (Correct answer)

Correct answer: Velocity

Velocity is a vector quantity because it describes both the speed and the direction of motion.

ASVAB General Science Test

Which organelle is responsible for producing energy in the form of ATP in a cell?

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