ASVAB General Science Test 3 — Questions and Answers
Question 1: 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 2: 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 3: 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 4: 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 5: 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 6: 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 7: 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.
ASVAB General Science Test 3
What is the smallest unit of an element that retains the chemical properties of that element?