ASVAB General Science Practice Test 610571 Results

Your Results Global Average
Questions 5 5
Correct 0 3.12
Score 0% 62%

Review

1

Which of the following is the primary difference between a comet and an asteroid?

47% Answer Correctly

asteroids contain frozen water

comets have an atmosphere

asteroids have a coma

comets orbit the Sun
Solution

A comet is a loose collection of ice, dust, and small rocky particles that, in contrast to an asteroid, has an extended atmosphere surrounding the center. When passing close to the Sun, this atmosphere warms and begins to release gases forming a visible coma or tail.

2

The __________ nervous system controls voluntary actions.

52% Answer Correctly

peripheral

autonomic

central

somatic
Solution

Part of the peripheral nervous system, the somatic nervous system is made up of nerve fibers that send sensory information to the central nervous system and control voluntary actions.

3

Absolute zero is which of the following?

58% Answer Correctly

the freezing point of hydrogen

the freezing point of oxygen

0°C

the coldest temperature possible in the universe
Solution

In contrast to the Celsius scale (measured in degrees centigrade) that fixes 0° at the freezing point of water and the Fahrenheit scale that uses 32°, the Kelvin scale fixes 0 at absolute zero (-273°C) which is the lowest temperature possible in the universe.

4

What prevents blood pumped out of the ventricles from flowing back into the heart?

73% Answer Correctly

atria

valves

capillaries

platelets
Solution

The heart is the organ that drives the circulatory system. In humans, it consists of four chambers with two that collect blood called atria and two that pump blood called ventricles. The heart's valves prevent blood pumped out of the ventricles from flowing back into the heart.

5

What is a major difference between the somatic and autonomic nervous systems?

82% Answer Correctly

one controls thinking, the other controls feeling

one is inherited, the other is learned

one controls voluntary activity, one controls involuntary activity

each belongs to a different nervous system
Solution

Both are part of the peripheral nervous system. The somatic nervous system sends sensory information to the central nervous system and controls voluntary actions while the autonomic nervous system regulates involuntary activity in the heart, stomach, and intestines.