ASVAB General Science Practice Test 612111 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.18
Score	0%	64%

Review

Earth's history is divided into time periods, which of these is the shortest time period?

57% Answer Correctly

	eon
	age
	period
	epoch

Solution

The Earth is approximately 4.6 billion years old and its history is divided into time periods based on the events that took place and the forms of life that were dominant during those periods. The largest graduation of time is the eon and each eon is subdivided into eras, eras into periods, periods into epochs, and epochs into ages.

The number system most used in science is the:

93% Answer Correctly

	English system
	metric system
	British system
	American system

Solution

The metric system is a number system that designates one base unit for each type of measurement. For example, the base unit for length is the meter and the base unit for mass is the gram.

In the food chain, omnivores may be which of the following?

45% Answer Correctly

	secondary or tertiary consumers
	primary or secondary consumers
	primary or tertiary consumers
	secondary consumers or scavengers

Solution

Secondary or tertiary consumers may be omnivores.

What part of the nervous system controls simple reflexes?

54% Answer Correctly

	spinal cord
	autonomic
	cerebrum
	medulla

Solution

The spinal cord connects the brain to the body's network of nerves. It carries impulses between all organs and the brain and controls simple reflexes.

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
	sound radiation
	reflection

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.