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WorksheetsVocabulary List - Letter A
Total questions: 100
Worksheet time: 50mins
A skin disorder characterized by scaly skin, pimples, blackheads, whiteheads, and nodules is called _________.
Acne
Psoriasis
Eczema
Rosacea
A volcano that erupts or has erupted during the past 10,000 years is called an _________.
Active volcano
Dormant volcano
Extinct volcano
Shield volcano
A liquid form of a gas is known as _________
Aerosol
Vapor
Foam
Mist
A minor tremor after the principal shock of an earthquake is called an _________
Aftershock
Epicenter
Magnitude
Seismograph
An artificial vegetative propagation technique where a stem is slit and enclosed with moist moss is called _________.
Air layering
Grafting
Cutting
Budding
A substance that causes allergic reactions is called an _________
Allergen
Antibody
Enzyme
Pathogen
The alternation of sexual and asexual phases in the life cycle of ferns and mosses is called _________.
Alternation of generations
Metamorphosis
Binary fission
Budding
An air sac in the lung is called _________.
Alveolus
Bronchus
Trachea
Capillary
A chemical that is made up of hydrogen and nitrogen is called _________.
Ammonia
Methane
Nitric acid
Hydrogen peroxide
A condition characterized by temporary or permanent memory loss is called _________.
Amnesia
Insomnia
Dementia
Epilepsy
A protozoan with a clear shapeless cell that moves slowly along a surface by using its pseudopodia is called _________.
Amoeba
Paramecium
Euglena
Plasmodium
A cold-blooded vertebrate that is covered with moist skin, lays eggs in water, and has a three-chambered heart is called an _________.
Amphibian
Reptile
Fish
Bird
A short tube below the rectum that serves as passageway of solid waste is called _________.
Anal canal
Esophagus
Ureter
Trachea
A condition characterized by an abnormally low number of red blood cells or by a decrease in the amount of hemoglobin in the blood is called _________.
Anemia
Leukemia
Hemophilia
Polycythemia
An instrument that measures the speed of wind is called an _________.
Anemometer
Barometer
Thermometer
Hygrometer
A condition in which a blood vessel swells and its walls become thin is called _________.
Aneurysm
Thrombosis
Embolism
Stenosis
An invertebrate having a long cylindrical body that is divided into segments is called _________.
Annelid
Mollusk
Arthropod
Cnidarian
The period from midnight to noon is called _________.
Ante meridiem
Post meridiem
Twilight
Midday
The male organ of ferns and mosses that forms and holds the sperm cells is called _________.
Antheridium
Archegonium
Sporangium
Prothallus
A protein that protects the body against disease-causing microorganisms is called an _________
Antibody
Enzyme
Hormone
Hemoglobin
The opening in the body through which solid waste is eliminated is called the _________.
Anus
Esophagus
Urethra
Trachea
The largest artery is called the _________.
Aorta
Pulmonary vein
Carotid artery
Femoral artery
The point where Earth is farthest from the sun is called _________.
Aphelion
Perihelion
Solstice
Equinox
The part of the bulb that grows upward at the peak and produces leaves and flowers is called the _________?
Apical bud
Basal plate
Root cap
Lateral bud
An inflammation of the appendix is called _________
Appendicitis
Gastritis
Hepatitis
Nephritis
A finger-shaped structure in the large intestine that may play a role in fighting infection is called the _________.
Appendix
Cecum
Rectum
Colon
An arthropod that has four pairs of legs, with head and thorax in a single prosoma is called _________.
Arachnid
Insect
Crustacean
Myriapod
The female organ of ferns and mosses that forms and holds the egg cells is called _________.
Archegonium
Antheridium
Sporangium
Prothallus
A condition when the rhythm of the heart becomes irregular is called _________.
Arrhythmia
Hypertension
Bradycardia
Tachycardia
A blood vessel that is smaller than an artery is called an _________.
Arteriole
Vein
Capillary
Venule
A blood vessel that generally carries oxygenated blood is called _______.
Artery
Vein
Capillary
Venule
The inflammation of the joints is known as _______.
Arthritis
Osteoporosis
Myalgia
Dermatitis
A group of animals characterized by segmented chitinous exoskeleton and jointed appendages are called _______.
Arthropod
Mollusk
Echinoderm
Annelid
An infection in the lining of the intestines caused by ascarides is called _______.
Ascariasis
Amoebiasis
Giardiasis
Taeniasis
An elongated and cylindrical intestinal worm that infects humans is called _______.
Ascaris
Taenia
Ancylostoma
Enterobius
A way of propagating plants that does not involve reproductive cells is called _______.
Asexual reproduction
Sexual reproduction
Pollination
Fertilization
An ash deposit from the volcano is called _______.
Ashfall
Lava flow
Pyroclastic surge
Magma chamber
A neuron that connects a sensory neuron and a motor neuron is called _______.
Associative neuron
Sensory neuron
Motor neuron
Glial cell
The narrowing of the bronchial tubes that may be caused by allergens, weather, or certain medications is called _______.
Asthma
Bronchitis
Pneumonia
Emphysema
A scientist who studies the heavenly bodies is called an _______.
Astronomer
Biologist
Geologist
Chemist
A condition in which fats, calcium, and dead cells deposit along the inner walls of the arteries and prevent the smooth flow of blood is called _______.
Atherosclerosis
Osteoporosis
Leukemia
Emphysema
The force exerted by air is called _______.
Atmospheric pressure
Gravity
Magnetic force
Friction
A circular reef with open water at the center is called _______.
Atoll reef
Barrier reef
Fringing reef
Patch reef
The receiving chamber of the heart is called _______.
Atrium
Ventricle
Aorta
Valve
A division of the peripheral nervous system that controls involuntary actions and activities of the smooth and cardiac muscles is called _______.
Autonomic nervous system
Somatic nervous system
Central nervous system
Sensory nervous system
The time when approximately equal length of day and night occurs; takes place on September 23 is called _______.
Autumnal equinox
Summer solstice
Winter solstice
Vernal equinox
An imaginary line that passes through the poles at which Earth rotates is called _______.
Axis
Equator
Meridian
Latitude
A long nerve fiber of a neuron is called _______.
Axon
Dendrite
Synapse
Cell body
A type of joint that allows the connected bones to move in many directions is called _______.
Ball-and-socket joint
Hinge joint
Pivot joint
Gliding joint
An instrument that measures atmospheric pressure is called a _______.
Barometer
Thermometer
Hygrometer
Anemometer
A reef that is separated from the island shore by a lagoon, or a shallow stretch of water partly separated from the sea by a strip of sand is called _______.
Barrier reef
Fringing reef
Atoll
Coral island
A greenish fluid that aids in digestion of fats is called _______.
Bile
Saliva
Mucus
Plasma
A vertebrate that is warm-blooded, has a spindle-shaped body, and is covered with feathers is called a _______.
Bird
Fish
Reptile
Amphibian
A combination of fixed and movable pulleys is called _______.
Block-and-tackle pulley
Inclined plane
Lever system
Wheel and axle
The pressure that is exerted by blood on the inner walls of the blood vessels is called _______.
Blood pressure
Pulse rate
Osmotic pressure
Atmospheric pressure
The passageway of blood is called a _______.
Blood vessel
Nerve fiber
Air sac
Lymph node
The fluid that carries oxygen from the lungs to the different cells of the body is called _______.
Blood
Saliva
Urine
Sweat
The nostril on top of the head of a cetacean is called a _______.
Blowhole
Gill slit
Snout
Spiracle
The body fat of a cetacean is called _______.
Blubber
Flipper
Plankton
Barnacle
A soft and pasty mass produced from mechanical digestion in the mouth is called _______.
Bolus
Chyme
Feces
Saliva
The most highly specialized organ of the human body is the _______.
Brain
Liver
Heart
Kidney
A part of the brain that maintains the essential regulatory mechanisms of the body is called _______.
Brain stem
Cerebellum
Cerebrum
Hypothalamus
An abnormal growth of cells in the brain is known as _______.
Brain tumor
Stroke
Meningitis
Epilepsy
The process of getting oxygen-containing air into the body and expelling carbon dioxide-containing air out of the body is called _______.
Breathing
Digestion
Circulation
Excretion
A smaller branch of the bronchus is called a _______.
Bronchiole
Alveolus
Trachea
Larynx
The inflammation of the bronchi inside the lungs is called _______.
Bronchitis
Asthma
Pneumonia
Emphysema
A segment of the respiratory tract that serves as passageway of air from the trachea is called _______.
Bronchus
Alveolus
Diaphragm
Larynx
An artificial vegetative propagation technique that is similar to grafting except that a bud is used instead of a twig is called _______.
Budding
Layering
Cutting
Micropropagation
A vegetative plant that consists of short underground stems, and has many fleshy leaves that store food is called a _______.
Bulb
Tuber
Rhizome
Corm
A mineral that hardens the reef when the corals die is called _______.
Calcium carbonate
Silica
Magnesium sulfate
Sodium chloride
The growing layer of a stem is called _______.
Cambium
Cortex
Xylem
Phloem
The smallest blood vessel is called a _______.
Capillary
Vein
Artery
Venule
The main muscle comprising the heart is called _______.
Cardiac muscle
Skeletal muscle
Smooth muscle
Striated muscle
A division of the circulatory system that is composed of the heart, the blood vessels, and the blood for distribution of oxygen and nutrients throughout the body is called the _______.
Cardiovascular system
Respiratory system
Digestive system
Nervous system
A plant that eats small animals such as insects is called a _______.
Carnivorous plant
Herbivorous plant
Aquatic plant
Desert plant
A connective tissue that protects the bones from rubbing against each other is called _______.
Cartilage
Ligament
Tendon
Muscle
A type of fish that has a spindle-shaped body and tail fins that are used in swimming is called a _______.
Cartilaginous fish
Flatfish
Jawless fish
Lobe-finned fish
The central part of the neuron that contains the nucleus is called the _______.
Cell body
Axon
Dendrite
Synapse
The inflammation of the skin and deep underlying tissues is called _______.
Cellulitis
Eczema
Psoriasis
Impetigo
A division of the nervous system that is composed of the brain and the spinal cord is called the _______.
Central nervous system
Peripheral nervous system
Autonomic nervous system
Somatic nervous system
The second largest part of the brain is called the _______.
Cerebellum
Medulla
Pons
Thalamus
A partial or complete brain damage before, during, or shortly after birth is called _______.
Cerebral palsy
Epilepsy
Hydrocephalus
Autism
A fluid that surrounds the brain and the spinal cord, and can also be found in spaces within the brain is called _______.
Cerebrospinal fluid
Synovial fluid
Lymph
Blood
The largest part of the brain is called the _______.
Cerebrum
Cerebellum
Medulla
Pons
A mammal that lives in water, but must come to the surface to breathe air through its blowhole is called a _______.
Cetacean
Crustacean
Amphibian
Reptile
A process that occurs when chemicals break down food into simpler form is called _______.
Chemical digestion
Physical digestion
Absorption
Assimilation
A viral infection characterized by itchy rashes and fluid-filled blisters is called _______.
Chicken pox
Measles
Mumps
Influenza
The permanent loss of kidney function is called _______.
Chronic renal failure
Nephrolithiasis
Acute nephritis
Urinary tract infection
Short hairlike projections are called _______.
Cilia
Flagella
Villi
Pseudopodia
________ is the process by which oxygen and nutrients are carried by the blood to all parts of the body.
Circulation
Respiration
Digestion
Excretion
________ is the organ system that is responsible for circulation of blood and lymph throughout the body.
Circulatory system
Digestive system
Respiratory system
Nervous system
________ is the feather-like formation of cloud.
Cirrus cloud
Cumulus cloud
Stratus cloud
Nimbus cloud
________ is the ordinary legal day that begins at midnight and ends at midnight.
Civil day
Solar day
Business day
Calendar day
________ is a radially symmetrical animal with tentacles around its mouth.
Coelenterate
Annelid
Arthropod
Mollusk
________ is the nature of an animal that makes the body temperature of the animal change and become the same as the temperature in the environment.
Cold-blooded
Warm-blooded
Nocturnal
Herbivorous
________ is a viral infection characterized by clusters of small blisters.
Cold sore
Chickenpox
Measles
Wart
________ is a protein that holds the muscles and organs in place and gives strength and form to the skin.
Collagen
Hemoglobin
Insulin
Keratin
________ is a homogeneous mixture, which at times can appear as a heterogeneous mixture.
Colloid
Solution
Suspension
Alloy
________ is a bone fracture that results when a bone is crushed into several pieces.
Comminuted fracture
Greenstick fracture
Transverse fracture
Oblique fracture
________ is a bone fracture that results when a broken bone goes through the skin.
Compound fracture
Greenstick fracture
Simple fracture
Comminuted fracture
