ASVAB General Science Practice Test 267086 Results

Your Results Global Average
Questions 5 5
Correct 0 3.60
Score 0% 72%

Review

1

Which of the following is not true of light waves?

62% Answer Correctly

are mechanical waves

can travel through a vacuum

are electromagnetic waves

travel faster than sound waves
Solution

Unlike mechanical sound waves that require a physical medium for propagation, light waves are electromagnetic and can travel through empty space. Light waves are also much faster, travelling at 186,000 m/s vs. 343 m/s for sound waves.

2

The pitch of the siren of an approaching ambulance changes as it approaches you. This is an example of which of the following?

70% Answer Correctly

Doppler effect

reflection

sound radiation

refraction
Solution

The Doppler effect occurs when the source or listener (or both) of sound waves is moving. If they're moving closer together, the listener perceives the sound with a higher pitch and, when they're moving apart, the listener perceives the sound with a lower pitch.

3

Which of the following is not a method of heat transfer?

68% Answer Correctly

radiation

reflection

convection

conduction
Solution

Heat is always transferred from warmer to cooler environments through conduction, convection, or radiation.

4

The heat from the Sun traveling to Earth is an example of which of the following?

86% Answer Correctly

radiation

electricity

convection

conduction
Solution

Radiation occurs when electromagnetic waves transmit heat. An example is the heat from the Sun as it travels to Earth.

5

Elements in the Periodic Table of the Elements are ordered by which of the following?

75% Answer Correctly

atomic weight

atomic number

atomic mass

number of electron shells
Solution

The Periodic Table of the Elements categorizes elements primarily by the number of protons in their nucleus (atomic number) and secondarily by the characteristics they exhibit.