CLEP Introduction to Natural Science 3 — Questions and Answers
Question 1: What is the pH value considered neutral on the pH scale?
- 0
- 7 (Correct answer)
- 10
- 14
Correct answer: 7
A pH of 7 indicates a neutral solution, neither acidic nor basic.
Question 2: Which planet is the largest in our solar system?
- Saturn
- Earth
- Jupiter (Correct answer)
- Neptune
Correct answer: Jupiter
Jupiter is the largest planet by both mass and volume.
Question 3: What molecule carries genetic information in living organisms?
- ATP
- DNA (Correct answer)
- Glucose
- Hemoglobin
Correct answer: DNA
DNA stores the genetic instructions used in development and function.
Question 4: Which law states that energy cannot be created or destroyed?
- Newton's first law
- Law of conservation of energy (Correct answer)
- Boyle's law
- Ohm's law
Correct answer: Law of conservation of energy
The law of conservation of energy states energy only changes form.
Question 5: What is the basic structural and functional unit of all living organisms?
- Tissue
- Organ
- Cell (Correct answer)
- Molecule
Correct answer: Cell
The cell is the smallest unit capable of carrying out life processes.
Question 6: Which layer of the atmosphere contains the ozone that absorbs UV radiation?
- Troposphere
- Stratosphere (Correct answer)
- Mesosphere
- Thermosphere
Correct answer: Stratosphere
The ozone layer resides in the stratosphere and blocks harmful UV rays.
Question 7: What is the speed of light in a vacuum approximately equal to?
- 300,000 km/s (Correct answer)
- 30,000 km/s
- 3,000 km/s
- 300 km/s
Correct answer: 300,000 km/s
Light travels at about 300,000 kilometers per second in a vacuum.
CLEP Introduction to Natural Science 3
What is the pH value considered neutral on the pH scale?