ASVAB General Science Practice Test 3 — Questions and Answers
Question 1: Newton's first law of motion states that an object at rest will remain at rest unless acted upon by a(n):
- Balanced force
- Unbalanced net force (Correct answer)
- Gravitational field
- Magnetic field
Correct answer: Unbalanced net force
Newton's first law (law of inertia) states that an object's state of motion changes only when a net unbalanced force acts on it.
Question 2: Which of the following is an example of a chemical change rather than a physical change?
- Melting ice
- Dissolving sugar in water
- Cutting paper
- Burning wood (Correct answer)
Correct answer: Burning wood
Burning wood is a chemical change because new substances (ash, carbon dioxide, water vapor) are formed with different properties.
Question 3: The process by which water vapor cools and turns into liquid water is called:
- Evaporation
- Sublimation
- Condensation (Correct answer)
- Precipitation
Correct answer: Condensation
Condensation occurs when water vapor loses thermal energy, slows down, and changes state from gas to liquid.
Question 4: Which blood type is considered the universal donor for red blood cell transfusions?
- Type A
- Type B
- Type AB
- Type O negative (Correct answer)
Correct answer: Type O negative
Type O negative blood lacks A, B, and Rh antigens, so it can be transfused to patients of any blood type without triggering an immune reaction.
Question 5: Which of the following best describes an element?
- A mixture of two or more compounds
- A substance made of only one type of atom (Correct answer)
- A molecule containing different atoms
- A solution of dissolved salts
Correct answer: A substance made of only one type of atom
An element is a pure substance composed entirely of atoms with the same atomic number and cannot be broken down into simpler substances by chemical means.
Question 6: What is the name of the force that opposes the sliding motion of two surfaces in contact?
- Tension
- Gravity
- Friction (Correct answer)
- Normal force
Correct answer: Friction
Friction is the contact force that resists the relative motion between two surfaces and converts kinetic energy into heat.
Question 7: In which phase of mitosis do chromosomes line up along the cell's equatorial plane?
- Prophase
- Metaphase (Correct answer)
- Anaphase
- Telophase
Correct answer: Metaphase
During metaphase, chromosomes align at the cell's metaphase plate, ensuring each daughter cell will receive the correct number of chromosomes.
ASVAB General Science Practice Test 3
Newton's first law of motion states that an object at rest will remain at rest unless acted upon by a(n):