ASVAB General Science Solved MCQs

 

ASVAB General Science Solved MCQs

The basic unit of life is

(A) the cell. ✔

(B) DNA

(C) the carbon molecule.

(D) oxygen.

The largest planet in the solar system is

 (A) Earth.

 (B) Mars.

 (C) Saturn.

 (D) Jupiter. ✔

 The intestines are part of the

 (A) circulatory system.

 (B) nervous system.

 (C) respiratory system.

 (D) digestive system. ✔

Which planet is named after the Greek god who personified the sky?

 (A) Earth

 (B) Mars

 (C) Pluto

 (D) Uranus✔

 An animal that eats only meat is called a(n)

 (A) omnivore.

 (B) herbivore.

 (C) carnivore. ✔

 (D) voracious.

The atmosphere of Mars is composed mostly of

 (A) oxygen.

 (B) carbon dioxide. ✔

 (C) helium.

 (D) Mars has no atmosphere

 Not counting the sun, the closest star to the Earth is

 (A) Rigel.

 (B) Proxima Centauri. ✔

 (C) Antares.

 (D) Betelgeuse

Edmund Halley studied comets, meteors, planets, and stars. He was a/an _____.

(A) Biologist

(B) Astronomer✔

(C) Meteorologist

(D) Ichthyologist

Igneous rocks are formed from the cooling of molten material. _____ is an example of igneous rock.

(A) Pumice✔

(B) Shale

(C) Marble

(A) Coal

Which of the following can hold the most moisture?

(A) Cold air

(B) Moving air

(C) Stable air

(D) Warm air✔

When a prevailing wind reaches a mountain range, what happens to the air?

(A) It is blocked and starts to move backward

(B) It rises and cools, causing condensation. ✔

(C) It expands and heats, resulting in rain.

(D) It expands and heats, resulting in a dry, desertlike area

The process of erosion is linked to the formation of which of the following types of rocks?

(A) Igneous

(B) Extrusive

(C) Sedimentary✔

(D) Metamorphic

Scientists believe that the universe is expanding because of which of the following indicators?

(A) The difference in time it takes for light from various stars to reach us

(B) The red shift in the spectra of stars✔

(C) The difference in chemical composition of various stars

(D) The explosion of supernovas

The _____ cells in the blood are responsible for carrying antibodies that fight off infection.

(A) Platelet

(B) Plasma

(C) Red blood

(D) White blood✔

 The chemical process in which electrons are removed from a molecule is called

 (A) respiration.

 (B) recreation.

 (C) oxidation. ✔

 (D) metabolism.

 What is a single unit of quanta called?

 (A) quantum✔

 (B) quantumonium

 (C) quantus

 (D) quanfactorial

 Light waves travel at a rate of about

 (A) 186,000 miles per hour.

 (B) 186,000 miles per minute.

 (C) 18,600 miles per hour.

 (D) 186,000 miles per second✔

 

 Joints that hold bones firmly together are called

 (A) hinge joints.

 (B) ball and socket joints.

 (C) fixed joints. ✔

 (D) pivot joints.

 Of the levels listed, the top or broadest level of the classification system for living organisms is called the

 (A) class.

 (B) phylum.

 (C) kingdom. ✔

 (D) genus.

 Which planet is the brightest object in the sky, aside from the sun and moon?

 (A) Saturn

 (B) Pluto

 (C) Venus✔

 (D) Mercury

 The human heart includes

 (A) 2 chambers.

 (B) 3 chambers.

 (C) 4 chambers. ✔

 (D) 5 chambers

 White blood cells

 (A) produce antibodies.

 (B) fight infections.

 (C) carry oxygen and carbon dioxide.

 (D) both A and B✔

 A measureable amount of protein can be found in all of the following foods EXCEPT

 (A) eggs.

 (B) meat.

 (C) peas.

 (D) apples. ✔

Power is defined as the rate of work done. It is measured in _____.

(A) Decibels

(B) Joules

(C) Watts✔

(D) Hertz

When the moon moves into the Earth’s shadow, a _____ occurs.

(A) Half moon

(B) Full moon

(C) Solar eclipse

(D) Lunar eclipse✔

The simplest form of a substance is known as _____.

(A) Molecule

(B) Cell

(C) Mixture

(D) Element✔

A ______ is a DNA unit that contains the code for a particular characteristic

(A) Gene✔

(B) Chromosome

(C) Allele

(D) Double helix

_____ is known as the ability to do work.

(A) Power

(B) Movement

(C) Energy✔

(D) Force

A strip of land 1 kilometer long is equal to _____.

(A) 10,000 centimeters

(B) 1000 meters✔

(C) 100 decimeters

(D) 10 dekameters

When a plant undergoes photosynthesis, one of the by-products is

(A) carbon dioxide.

(B) light.

(C) ozone.

(D) oxygen. ✔

Why is the nucleus so important to a living cell?

(A) It controls the production and elimination of cell waste.

(B) It controls most of the activities of the cell. ✔

(C) It controls photosynthesis.

(D) It uses oxygen to make carbon dioxide.

Which of the following do not have organelles?

(A) Muscle cells

(B) Protozoa

(C) Nerve cells

(D) Bacteria✔

Which of the following is not an example of a fruit?

(A) Raspberries

(B) Sunflower seeds

(C) Corn

(D) Potato✔

Which of the following terms can be used to describe a bird?

(A) Invertebrate, omnivore

(B) Vertebrate, warm-blooded✔

(C) Endoskeleton, cold-blooded

(D) Crustacean, endoskeleton

Why are decomposers important to an ecosystem?

(A) They make nutrients available for plants to use. ✔

(B) They create soil for farming.

(C) They stabilize the soil.

(D) They enhance the habitat with specialized particles important to life.

Which of the following is the part of the skeletal system that protects the spinal cord?

(A) Marrow

(B) Cartilage

(C) Ligaments

(D) Vertebrae✔

A bruise on your skin is the result of which of the following?

(A) Excess strain on the muscle

(B) Broken capillaries✔

(C) Overactive sweat glands

(D) Swelling

The function that moves food from one part of the digestive system to another is called

(A) respiration.

(B) digestion.

(C) mechanical decomposition.

(D) peristalsis. ✔

Which of the following words are all associated with the nervous system?

 (A) Nephrons, urethra, bladder

(B) Antigens, T cells, cilia

(C) Hypothalamus, pons, cortex✔

(D) Lymph nodes, spleen, tonsils

Which of the following is the name for the space between two nerve cells where an electric charge transmits information?

(A) Nerve cell gap

(B) Synapse✔

(C) Axon

(D) Dendrite

Which of the following states is likely to have the greatest biodiversity?

(A) North Dakota

(B) Illinois

(C) Nebraska

(D) Florida✔

Which of the following best represents what happens to ultraviolet radiation from the sun when it reaches Earth’s atmosphere?

(A) It changes into chlorofluorocarbons.

(B) Some of it is absorbed by the ozone layer. ✔

(C) All of it reaches Earth’s surface.

(D) It is deflected back into space.

Which of the following properties of a sound wave affects how loud or soft the sound is?

(A) Crest

(B) Trough

(C) Frequency

(D) Amplitude✔

The major force causing sea-floor spreading, continental drift, and the collision of continental plates is

(A) subduction of Earth’s core.

(B) creation of oceanic ridges.

(C) compression of continents.

(D) convection currents in the mantle. ✔

Earth’s greenhouse effect is caused by which of the following conditions?

(A) Changing rainfall patterns from global warming

(B) Heat from the sun that is trapped by atmospheric gases✔

(C) The increase in the thickness of the ozone layer

(D) The number of plants in tropical rainforests trapping CO2

The thinnest and uppermost layer of the Earth is known as _____.

(A) Crust✔

(B) Asthenosphere

(C) Soil

(D) Upper Mantle

Acids have a pH level below 7. The taste of acids is _____.

(A) Sweet

(B) Spicy

(C) Sour✔

(D) Salty

In this food chain, Plankton → Shrimp →Salmon → Sea Gull → Falcon, the role of the plankton is _____.

(A) Producer✔

(B) Primary consumer

(C) Secondary consumer

(D) Decomposer

 What is the most abundant element, by mass, in the Earth’s crust?

 (A) carbon

 (B) oxygen✔

 (C) gold

 (D) salt

 Osmosis is

 (A) diffusion of water. ✔

 (B) transfer of oxygen.

 (C) low blood sugar.

 (D) protein.

 A meter consists of

 (A) 10 centimeters.

 (B) 100 millimeters.

 (C) 100 centimeters. ✔

 (D) 10 millimeters.

 One light-year is

 (A) the distance traveled by light in one year. ✔

 (B) the brightness of light at 30,000 miles.

 (C) 17 standard Earth years.

 (D) Spock’s birthday

Electrons are particles that are

 (A) positively charged

 (B) neutral.

 (C) able to move freely.

 (D) negatively charged✔

 The asteroid belt is located

 (A) around Mercury.

 (B) between Mars and Jupiter. ✔

 (C) inside the orbit of Venus.

 (D) There is no such thing as an asteroid belt.

 The atomic number of an atom is determined by

 (A) the size of its nucleus.

 (B) the number of protons. ✔

 (C) the number of electrons.

 (D) its location in the periodic table.

 The “control center” of a cell is called the

 (A) nucleus. ✔

 (B) compound

 (C) mitochondria

 (D) atom.

 How many planets in the solar system have rings?

 (A) one

 (B) two

 (C) three

 (D) four✔

When two tectonic plates converge and one rises above the other, which of the following are likely to form?

(A) Volcanoes✔

(B) Hot spots

(C) Tsunamis

(D) Rifts

Breaking waves or breakers that occur near the shoreline are caused by which of the following conditions?

(A) Earthquakes that occur far out in the ocean

(B) Friction between the wave trough and the ocean bottom✔

(C) The expansion of the wavelength of the wave

(D) Increasing tidal forces

How long does it take for Earth to make one revolution around the sun?

(A) 1 year✔

(B) 1 month

(C) 1 week

(D) 1 day

An eclipse of the sun occurs under which of the following conditions?

(A) Earth is between the sun and the moon.

(B) Earth is rotating faster than the moon.

(C) Earth, the sun, and the moon are perpendicular to each other.

(D) The moon is between the sun and Earth. ✔

 The temperature at which a substance’s solid and liquid states exist in equilibrium is its

 (A) melting point. ✔

 (B) boiling point.

 (C) anti-freezing point.

 (D) concentration point.

The green coloring that allows plants to produce food through photosynthesis is known as _____.

(A) Cellulose

(B) Hemoglobin

(C) Chitin

(D) Chlorophyll✔

The vector quantity that measures how fast an object moves and the direction in which it moves is ______.

(A) Speed

(B) Velocity✔

(C) Momentum

(D) Acceleration

On the Celsius scale, the boiling point is _____.

(A) 0°

(B) 100°✔

(C) 212°

(D) 373.15°

_____ are biomes characterized by lots of rainfall and high temperatures.

(A) Deserts

(B) Tropical rainforests✔

(C) Deciduous forests

(D) Grasslands

Newton’s law of _____ states that the force needed to accelerate an object is directly proportional to the mass of the object.

(A) Gravity

(B) Relativity

(C) Entropy

(D) Inertia✔

The planet that is fourth nearest to the sun is ______.

(A) Venus

(B) Earth

(C) Mars✔

(D) Jupiter

Digestion is the process of breaking down food that enters the body. It starts in the _____.

(A) Mouth✔

(B) Esophagus

(C) Stomach

(D) Small intestines

The ______ is the part in the Earth where all life exists.

(A) Crust

(B) Atmosphere

(C) Biosphere✔

(D) Biome

The system of organs responsible for controlling all functions of the body is the _____.

(A) Central system

(B) Endocrine system

(C) Lymphatic system

(D) Nervous system✔

An example of a marsupial is ______.

(A) Squirrel

(B) Kangaroo✔

(C) Platypus

(D) Woodpecker

Bread, rice, pasta, and potatoes are examples of foods rich in _____. They are main sources of energy for the body.

(A) Carbohydrates✔

(B) Protein

(C) Fats

(D) Vitamins

Dogs and lions both have strong canine teeth for eating meat. This meat-eating animal group is most commonly known as _____.

(A) Herbivores

(B) Carnivores✔

(C) Omnivores

(D) Dectrivores

The sub-atomic particle that is found in orbits around the nucleus and carries a negative charge is called _____.

(A) Atom

(B) Proton

(C) Electron✔

(D) Neutron