Praxis Science 5905 Vocabulary
Acceleration - *answers *how quickly an object changes velocity
Acid - *answers *a compound that is able to contribute a hydrogen ion and has a ph
lower than 7
Alto-cloud - *answers *a cloud located in the middle level of the sky
Amphibians - *answers *a class of cold-blooded vertebrate animals that have gills when
they hatch but develop lungs in adulthood
Amplitude - *answers *a measure of a wave's displacement from its rest position
Anatomy - *answers *the study of the structure of living organisms
Animalia - *answers *the kingdom that contains multicellular organisms that can move
around and must consume other organisms for energy
Anther - *answers *part of the male reproductive organ of the flower =ing plant where
pollen is stored
Antibodies - *answers *special proteins that bind to foreign substances in the body and
neutralize them
Antigens - *answers *substances that the body recognizes as foreign
Artery - *answers *a blood vessel that carries blood away from the heart
Asexual - *answers *does not require the union of sex cells to reproduce
Asteroid - *answers *a large rocky body, smaller than a planet, that orbits the sun
Asthenosphere - *answers *the hot, semisolid part of the mantle under the lithosphere
Atmosphere - *answers *the mass of gasses that surround the Earth
Atom - *answers *the smallest particle of a chemical element that retains the properties
of the element
Atomic Mass - *answers *the mass of an atom calculated by adding the number of
protons and neutrons
Atomic Number - *answers *the number of protons in the nucleus of an atom
Attraction - *answers *a force that draws objects closer
,Praxis Science 5905 Vocabulary
B cells - *answers *(also called B lymphocytes) produce special proteins called
antibodies that bind to foreign substances, called antigens, and neutralize them
Balanced Equation - *answers *a chemical equation where the same amount of each
element is represented on both sides (the reactants and the products have equal
amounts of each element)
Base - *answers *a compound that is able to contribute a hydroxide ion and has a ph
greater than 7
Biofuel - *answers *biological matter that can be burned to produce heat, steam, or
electricity
Biomass - *answers *plant-based fuel, usually burned, for generating heat, steam, or
electricity
Biomes - *answers *large geographic areas that provide the environmental conditions
in which certain organisms live
Birds - *answers *endothermic vertebrate animals that have wings, feathers, scaly legs,
beaks, and no teeth, and bear their young in a hard-shelled egg
Black Holes - *answers *a massive star that has collapsed and has a gravitational force
that is so strong that light cannot escape
Calyx - *answers *all of the sepals of a flower together
Capillaries - *answers *the smallest blood vessels in the body where gas exchange
occurs
Carbohydrates - *answers *all sugars that act as a source of energy for all living things
Carpel - *answers *the ovary of a flowering plant where the ova are produced
Cell - *answers *the smallest living part of an organism
Cell Division - *answers *the separation of a cell into two cells with identical genes
Cell Membrane - *answers *the outer covering of a cell
Cell Wall - *answers *hard outer structure of a plant cell
Cellular Metabolism - *answers *(also called cellular respiration) how cells produce
energy
, Praxis Science 5905 Vocabulary
Cerebellum - *answers *part of the brain located at the back and bottom that controls
motor movements
Cerebrum - *answers *the biggest part of the brain, the wrinkly gray part at the front
and top, that controls different body functions like thinking, vision, hearing, touch, and
smell
Cervix - *answers *the passage that connects the uterus to the vagina
Chemical Change - *answers *making or breaking chemical bonds between atoms in a
chemical reaction
Chlorophyll - *answers *a chemical in the leaves of plants that uses energy from
sunlight to convert water and carbon dioxide into sugars
Chromosome - *answers *dense strands of DNA that contain the genetic code of an
organism
Cinder Cone Volcano - *answers *a small, steep volcano formed by ash with a single
lava vent and a crater on top
Cirrus Cloud - *answers *a thin, wispy cloud that appears high in the sky
Classification - *answers *sorting according to characteristics
Climate - *answers *an area's weather conditions over time
Climate Zone - *answers *a large area that experiences similar average temperature
and precipitation
Cloud - *answers *billions of tiny water droplets floating in the air together
Color - *answers *frequency of a light wave
Combustion - *answers *a chemical reaction that produces carbon dioxide and water,
usually from the burning of fuels
Comet - *answers *a small object made of ice and dust that orbits the sun
Communities - *answers *interdependent organisms living together in a habitat
Competition - *answers *occurs when two organisms need to use the same resources
Composite Volcano - *answers *a cone-shaped volcano with steep sides made of lava,
ash, and rock
Acceleration - *answers *how quickly an object changes velocity
Acid - *answers *a compound that is able to contribute a hydrogen ion and has a ph
lower than 7
Alto-cloud - *answers *a cloud located in the middle level of the sky
Amphibians - *answers *a class of cold-blooded vertebrate animals that have gills when
they hatch but develop lungs in adulthood
Amplitude - *answers *a measure of a wave's displacement from its rest position
Anatomy - *answers *the study of the structure of living organisms
Animalia - *answers *the kingdom that contains multicellular organisms that can move
around and must consume other organisms for energy
Anther - *answers *part of the male reproductive organ of the flower =ing plant where
pollen is stored
Antibodies - *answers *special proteins that bind to foreign substances in the body and
neutralize them
Antigens - *answers *substances that the body recognizes as foreign
Artery - *answers *a blood vessel that carries blood away from the heart
Asexual - *answers *does not require the union of sex cells to reproduce
Asteroid - *answers *a large rocky body, smaller than a planet, that orbits the sun
Asthenosphere - *answers *the hot, semisolid part of the mantle under the lithosphere
Atmosphere - *answers *the mass of gasses that surround the Earth
Atom - *answers *the smallest particle of a chemical element that retains the properties
of the element
Atomic Mass - *answers *the mass of an atom calculated by adding the number of
protons and neutrons
Atomic Number - *answers *the number of protons in the nucleus of an atom
Attraction - *answers *a force that draws objects closer
,Praxis Science 5905 Vocabulary
B cells - *answers *(also called B lymphocytes) produce special proteins called
antibodies that bind to foreign substances, called antigens, and neutralize them
Balanced Equation - *answers *a chemical equation where the same amount of each
element is represented on both sides (the reactants and the products have equal
amounts of each element)
Base - *answers *a compound that is able to contribute a hydroxide ion and has a ph
greater than 7
Biofuel - *answers *biological matter that can be burned to produce heat, steam, or
electricity
Biomass - *answers *plant-based fuel, usually burned, for generating heat, steam, or
electricity
Biomes - *answers *large geographic areas that provide the environmental conditions
in which certain organisms live
Birds - *answers *endothermic vertebrate animals that have wings, feathers, scaly legs,
beaks, and no teeth, and bear their young in a hard-shelled egg
Black Holes - *answers *a massive star that has collapsed and has a gravitational force
that is so strong that light cannot escape
Calyx - *answers *all of the sepals of a flower together
Capillaries - *answers *the smallest blood vessels in the body where gas exchange
occurs
Carbohydrates - *answers *all sugars that act as a source of energy for all living things
Carpel - *answers *the ovary of a flowering plant where the ova are produced
Cell - *answers *the smallest living part of an organism
Cell Division - *answers *the separation of a cell into two cells with identical genes
Cell Membrane - *answers *the outer covering of a cell
Cell Wall - *answers *hard outer structure of a plant cell
Cellular Metabolism - *answers *(also called cellular respiration) how cells produce
energy
, Praxis Science 5905 Vocabulary
Cerebellum - *answers *part of the brain located at the back and bottom that controls
motor movements
Cerebrum - *answers *the biggest part of the brain, the wrinkly gray part at the front
and top, that controls different body functions like thinking, vision, hearing, touch, and
smell
Cervix - *answers *the passage that connects the uterus to the vagina
Chemical Change - *answers *making or breaking chemical bonds between atoms in a
chemical reaction
Chlorophyll - *answers *a chemical in the leaves of plants that uses energy from
sunlight to convert water and carbon dioxide into sugars
Chromosome - *answers *dense strands of DNA that contain the genetic code of an
organism
Cinder Cone Volcano - *answers *a small, steep volcano formed by ash with a single
lava vent and a crater on top
Cirrus Cloud - *answers *a thin, wispy cloud that appears high in the sky
Classification - *answers *sorting according to characteristics
Climate - *answers *an area's weather conditions over time
Climate Zone - *answers *a large area that experiences similar average temperature
and precipitation
Cloud - *answers *billions of tiny water droplets floating in the air together
Color - *answers *frequency of a light wave
Combustion - *answers *a chemical reaction that produces carbon dioxide and water,
usually from the burning of fuels
Comet - *answers *a small object made of ice and dust that orbits the sun
Communities - *answers *interdependent organisms living together in a habitat
Competition - *answers *occurs when two organisms need to use the same resources
Composite Volcano - *answers *a cone-shaped volcano with steep sides made of lava,
ash, and rock
