CSET CSET Physical Sciences: Physics and Chemistry 1 — Questions and Answers
Question 1: According to Newton's Second Law of Motion, force equals:
- mass × velocity
- mass × acceleration (Correct answer)
- mass × distance
- velocity × time
Correct answer: mass × acceleration
Newton's Second Law states F = ma, where force equals mass multiplied by acceleration.
Question 2: What is the SI unit for electric charge?
- Ampere
- Volt
- Coulomb (Correct answer)
- Ohm
Correct answer: Coulomb
The coulomb (C) is the SI unit of electric charge, equal to the charge transported by one ampere in one second.
Question 3: Which type of chemical bond involves the sharing of electrons between atoms?
- Ionic bond
- Covalent bond (Correct answer)
- Metallic bond
- Hydrogen bond
Correct answer: Covalent bond
Covalent bonds form when atoms share one or more pairs of electrons.
Question 4: What is the atomic number of an element?
- The number of neutrons in the nucleus
- The total number of protons and neutrons
- The number of protons in the nucleus (Correct answer)
- The number of electrons in the outer shell
Correct answer: The number of protons in the nucleus
The atomic number uniquely identifies an element and equals the number of protons in its nucleus.
Question 5: A wave with a higher frequency will have a:
- Longer wavelength
- Shorter wavelength (Correct answer)
- Greater amplitude
- Slower wave speed
Correct answer: Shorter wavelength
Frequency and wavelength are inversely proportional (v = fλ), so higher frequency means shorter wavelength at constant speed.
Question 6: Which of the following best describes an exothermic reaction?
- A reaction that absorbs heat from the surroundings
- A reaction that releases heat to the surroundings (Correct answer)
- A reaction that requires light to proceed
- A reaction that only occurs at high temperatures
Correct answer: A reaction that releases heat to the surroundings
Exothermic reactions release energy (heat) to the surroundings, resulting in a negative enthalpy change (ΔH < 0).
CSET CSET Physical Sciences: Physics and Chemistry 1
According to Newton's Second Law of Motion, force equals: