ASVAB General Science Test 5 — Questions and Answers
Question 1: Which organ in the human body is primarily responsible for filtering blood and producing urine?
- Liver
- Pancreas
- Kidney (Correct answer)
- Spleen
Correct answer: Kidney
The kidneys filter waste products from the blood and regulate water balance by producing urine.
Question 2: What is the term for a change in state directly from solid to gas without passing through the liquid phase?
- Condensation
- Evaporation
- Sublimation (Correct answer)
- Deposition
Correct answer: Sublimation
Sublimation is the phase transition from solid directly to gas, as seen with dry ice (solid CO₂).
Question 3: Which element is most abundant in Earth's atmosphere by volume?
- Oxygen
- Argon
- Carbon dioxide
- Nitrogen (Correct answer)
Correct answer: Nitrogen
Nitrogen makes up approximately 78% of Earth's atmosphere, far exceeding oxygen at about 21%.
Question 4: What type of chemical bond involves the sharing of electrons between atoms?
- Ionic bond
- Hydrogen bond
- Covalent bond (Correct answer)
- Metallic bond
Correct answer: Covalent bond
A covalent bond forms when two atoms share one or more pairs of electrons to achieve stable configurations.
Question 5: What is the unit used to measure electric current?
- Volt
- Watt
- Ohm
- Ampere (Correct answer)
Correct answer: Ampere
The ampere (amp) is the SI unit for electric current, measuring the flow of electric charge per second.
Question 6: Which process describes the movement of water through a semi-permeable membrane from an area of low solute concentration to high solute concentration?
- Diffusion
- Active transport
- Osmosis (Correct answer)
- Endocytosis
Correct answer: Osmosis
Osmosis is the passive movement of water across a semi-permeable membrane toward the region of higher solute concentration.
Question 7: What is the main function of red blood cells in the human body?
- Fighting infections
- Clotting blood
- Transporting oxygen (Correct answer)
- Producing antibodies
Correct answer: Transporting oxygen
Red blood cells (erythrocytes) contain hemoglobin, which binds to oxygen and transports it throughout the body.
ASVAB General Science Test 5
Which organ in the human body is primarily responsible for filtering blood and producing urine?