ASVAB General Science Practice Test 520304 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.03
Score	0%	61%

Review

Elements that belong to the same period in the Periodic Table of the Elements have the same number of:

50% Answer Correctly

	protons
	electron shells
	atomic mass units
	electrons

Solution

The rows of the Periodic Table are called periods and contain elements that have the same number of electron shells ordered from lower to higher atomic number.

Which of the following is not true about simple magnets?

62% Answer Correctly

	all of these are untrue
	opposite poles attract each other
	opposite poles repel each other
	same poles repel each other

Solution

Simple magnets have two poles, north and south, and opposite poles attract each other (N attracts S, S attracts N). Likewise, the same pole of two magnets repel (N repels N, S repels S). The Earth has a magnetic field and North and South Poles which enables the use of a magnetic compass to determine direction.

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
	refraction
	reflection
	sound radiation

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.

Generally, an atom has __________ negative electrons orbiting the nucleus as it does positive protons inside.

67% Answer Correctly

	more
	fewer
	equal numbers of
	double the number of

Solution

An electron is a subatomic particle that orbits the nucleus of an atom. It carries a negative electric charge. Generally, an atom has the same number of negative electrons orbiting the nucleus as it does positive protons inside.

Which of the following is the formula for power?

56% Answer Correctly

	\(P = w t\)
	\(P = {\vec{w} \over t}\)
	\(P = {w \over t}\)
	\(P = \vec{w}t\)

Solution

Power is the rate at which work is performed or work per unit time: \(P = {w \over t}\) and is measured in watts (W).