ASVAB ASVAB Certifications ASVAB-SECTION-7 Questions & Answers

• Question 91:

  The nucleus of an atom consists of __________.

  A. protons, which have a positive electrical charge, and neutrons, which have no charge.

  B. electrons, which have a positive electrical charge, and neutrons, which have no charge.

  C. protons, which have no electrical charge, and neutrons, which have a positive charge.

  D. protons (positive charge), electrons (negative charge), and neutrons (no charge).

  Correct Answer: A

  Explanation:

  The nucleus of an atom consists of protons, which have a positive electrical charge, and neutrons, which

  have no charge – Electrons, which have a negative charge, circle the nucleus in the orbital shell.

• Question 92:

  A gamete is a cell that __________.

  A. fuses with a zygote during fertilization

  B. provides nutritional support to a developing fetus

  C. fuses with another gamete during fertilization

  D. fuses with a spermatid before fertilization

  Correct Answer: C

  Explanation:

  A gamete is a cell that fuses with another gamete during fertilization.

• Question 93:

  What is the smallest part of matter that retains the chemical properties characteristic of a particular element?

  A. Isotope

  B. Molecule

  C. Electron

  D. Atom

  Correct Answer: D

  Explanation:

  The smallest part of matter that retains the chemical properties characteristic of a particular element is an

  atom.

  Molecules are made up of two or more atoms, and electrons are particles within the atom.

  An isotope is one of two or more atoms of the same element that have the same atomic number (i.e., the

  same number of protons) but a different number of neutrons.

• Question 94:

  The average distance of the Sun from the Earth is about __________.

  A. 240,000 miles

  B. 10 million miles

  C. 93 million miles

  D. 240 million miles

  Correct Answer: C

  Explanation:

  The average distance of the Sun from the Earth is about 93 million miles.

  The Earth's moon is about 240,000 miles from the Earth.

• Question 95:

  Humans have ____ pairs of chromosomes.

  A. 13

  B. 23

  C. 46

  D. 47

  Correct Answer: B

  Explanation:

  Humans have 23 pairs of chromosomes, or 46 chromosomes in all.

• Question 96:

  What is the scientific study of human culture called?

  A. Sociology

  B. Archaeology

  C. Anthropology

  D. Scientology

  Correct Answer: C

  Explanation:

  The scientific study of human culture is called anthropology, and includes study of the origin and behavior

  of humankind as well as its physical, social, and cultural development.

  Sociology is the study of human society, including patterns of social relations, social interaction, and

  culture.

  Archaeology is the study of past human life and culture by the recovery or discovery and examination of

  material evidence such as graves, buildings, tools, weapons, and other artifacts.

• Question 97:

  What are chloroplasts?

  A. Structures found in plant cells that assist in photo synthesis.

  B. Organelles found in plant cells that conduct photo synthesis.

  C. Substances found in primitive cyanobacteria.

  D. Substances found in green plants only after they blossom.

  Correct Answer: B

  Explanation:

  Chloroplasts are organelles found, in plant cells that conduct photosynthesis.

• Question 98:

  What are the major layers of Earth's atmosphere in order from the Earth's surface upward?

  A. Troposphere, stratosphere, mesosphere, thermosphere, exo sphere

  B. Troposphere, stratosphere, ionosphere, exo sphere

  C. Troposphere, tropopause, ionosphere, stratosphere, exo sphere

  D. Meso sphere, stratosphere, troposphere, tropopause

  Correct Answer: A

  Explanation:

  The five major layers of the atmosphere from the Earth's surface upward are the troposphere,

  stratosphere, mesosphere, thermosphere, and exosphere.

  The troposphere starts at the Earth's surface and extends to between 23,000 ft (7 km) at the poles and

  60,000 ft (17 km) at the equator, with some variations due to weather factors.

  The stratosphere extends from the top of the troposphere (23,000-60,000 ft or 7-17 km) to about 160,000

  ft (60 km). The stratosphere contains the ozone layer, which is mainly located in the lower part of the

  stratosphere from about 50,000-115,000 ft (15-35 km) above the surface, although the thickness varies

  somewhat across both the seasons and the Earth's geographical regions.

  The mesosphere extends from about 160,000 ft (50 km) to about 265,000-285,000 ft (50-54 miles or 80-85

  km).

  This is also where most meteors bum up when entering the atmosphere.

• Question 99:

  A substance that speeds up chemical reactions is a(n) __________.

  A. accelerator

  B. adipose

  C. compound

  D. catalyst

  Correct Answer: D

  Explanation:

  A substance that speeds up chemical reactions is a catalyst.

• Question 100:

  Which of the following is not usually a gas at room temperature?

  A. Oxygen

  B. Fluorine

  C. Sulfur

  D. Argon

  Correct Answer: C

  Explanation:

  Which of the following is not usually a gas at room temperature?

  Sulfur is normally a soft, bright-yellow solid at room temperature.

  The others are gaseous at room temperature.