Study these General Science ASVAB practice exam questions as part of your ASVAB study plan to identify categories you should focus your studies on and to learn what to expect on the actual ASVAB test. Share this page on Twitter or like us on Facebook or Google Plus to see the Answers and Explanations for free.
ASVAB Practice Questions | General Science Set 2
Question 1: The earth completes one trip around the sun approximately every:
(A) 7 days
(B) 365 days
(C) 30 days
(D) 30 weeks
Question 2: The stratosphere is above the _______?
Question 3: What is the normal average human adult heart rate?
(A) 72 beats per minute
(B) 120 beats per minute
(C) 16 beats per minute
(D) 1 beat per minute for every year of age
Question 4: Which of the following options do ovaries produce?
(D) growth hormone
Question 5: Salt helps to melt ice because it?
(A) dissolves in water to form an acid.
(B) chemically destroys the water molecules.
(C) lowers the temperature at which water freezes.
(D) is attracted to concrete sidewalks below the ice.
ASVAB Practice Questions | Answers & Explanations
Question 1 – (B) 365 days
Explanation – 365 days is the orbital period of the Earth moving around the Sun which is also equivalent to a year.
Question 2 – (D) troposphere
Explanation – The exosphere is the outermost layer of Earth’s atmosphere. The thermosphere is the layer of the Earth’s atmosphere directly above the mesosphere and directly below the exosphere. The mesosphere is the layer of the Earth’s atmosphere that is directly above the stratosphere and directly below the thermosphere. The stratosphere is the second major layer of Earth’s atmosphere, just above the troposphere, and below the mesosphere. The troposphere is the lowest portion of Earth’s atmosphere.
Question 3 – (A) 72 beats per minute
Explanation – The normal heart rate ranges from 60-100 bpm. Bradycardia refers to a slow heart rate, defined as below 60 bpm. Tachycardia refers to a fast heart rate, defined as above 100 bpm.
Question 4 – (B) estrogen
Explanation – Estrogens are a group of compounds named for their importance in both menstrual and estrous reproductive cycles. They are the primary female sex hormones which are produced in the ovaries.
Question 5 – (C) lowers the temperature at which water freezes.
Explanation – Salt melts ice essentially because adding salt lowers the freezing point of the water. Pure water freezes at 32°F (0°C). Water with salt (or any other substance in it) will freeze at some lower temperature. Just how low this temperature will be depends on the de-icing agent.