ASVAB General Science 5 — Questions and Answers
Question 1: Which subatomic particle has a negative charge?
- Proton
- Neutron
- Electron (Correct answer)
- Positron
Correct answer: Electron
Electrons carry a negative charge and orbit the nucleus of an atom in energy shells.
Question 2: What is the primary function of red blood cells?
- Fight infections
- Carry oxygen throughout the body (Correct answer)
- Form blood clots
- Produce antibodies
Correct answer: Carry oxygen throughout the body
Red blood cells contain hemoglobin, which binds oxygen in the lungs and delivers it to body tissues.
Question 3: Which law states that energy cannot be created or destroyed, only transformed?
- Law of Gravity
- First Law of Thermodynamics (Correct answer)
- Second Law of Thermodynamics
- 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 is the speed of light in a vacuum, approximately?
- 300,000 km/s (Correct answer)
- 150,000 km/s
- 3,000 km/s
- 30,000 km/s
Correct answer: 300,000 km/s
Light travels at approximately 300,000 kilometers per second (3 × 10⁸ m/s) in a vacuum.
Question 5: Which element is essential for the formation of bones and teeth?
- Iron
- Potassium
- Calcium (Correct answer)
- Sodium
Correct answer: Calcium
Calcium, often obtained from dairy products and leafy greens, is the primary mineral that gives bones and teeth their strength.
Question 6: What is the process by which water vapor cools and turns into liquid water?
- Evaporation
- Sublimation
- Condensation (Correct answer)
- Precipitation
Correct answer: Condensation
Condensation occurs when water vapor loses heat energy and transitions back into liquid water, as seen on a cold glass.
Question 7: Which type of electromagnetic radiation has the shortest wavelength?
- Radio waves
- Infrared
- Ultraviolet
- Gamma rays (Correct answer)
Correct answer: Gamma rays
Gamma rays have the shortest wavelengths and highest frequencies in the electromagnetic spectrum, making them the most energetic.
ASVAB General Science 5
Which subatomic particle has a negative charge?