Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
90 Cards in this Set
- Front
- Back
|
atmosphere
|
the blanket of air surrounding Earth
|
|
|
atom
|
the smallest unit of an element that has all the properties of that element and basic building block of matter
|
|
|
axis
|
an imaginary line that passes through Earth's center and its North and South Poles
|
|
|
carnivore
|
an animal that eats other animals; also called a second level consumer
|
|
|
change of state
|
a physical change that occurs when matter changes from one state to another, such as from a liquid to a gas
|
|
|
chemical change
|
a reaction or change in a substance, produced by chemical means, that results in a different substance
|
|
|
community
|
a group of populations that live together in the same place
|
|
|
compound
|
a substance made of two or more different elements chemically joined
|
|
|
condensation
|
the process of a gas changing into a liquid
|
|
|
conservation
|
the use of less of something to make the supply last longer
|
|
|
constellation
|
a pattern of stars, named after a mythological or religious figure, an object, or an animal
|
|
|
consumer
|
an animal that eats plants, other animals, or both
|
|
|
decomposer
|
a consumer that obtains food energy by breaking down the remains of dead plants and animals
|
|
|
density
|
the amount of matter in a given space and the mass of an object divided by its volume
|
|
|
deposition
|
the process in which sediment settles out of water or is dropped by wind
|
|
|
earthquake
|
a movement of the ground, caused by a sudden release of energy in Earth's crust
|
|
|
ecosystem
|
a community of organisms and the environment in which they live
|
|
|
element
|
a substance made up so only one kind of atom
|
|
|
energy
|
the ability to cause changes in matter
|
|
|
energy transfer
|
movement of energy from one place or object to another
|
|
|
energy pyramid
|
a diagram that shows how much food energy is passed from each level in a food chain to the next
|
|
|
environment
|
all the living and nonliving things that surround and affect an organism
|
|
|
equator
|
an imaginary line around Earth equally distant from the North and South poles
|
|
|
erosion
|
the process of wearing away and moving sediment by wind, moving water or ice
|
|
|
evaporation
|
the process of a liquid changing into a gas
|
|
|
experiment
|
a procedure carried out under controlled conditions to test a hypothesis
|
|
|
food chain
|
the transfer of food energy between organisms in an ecosystem
|
|
|
food web
|
a diagram that shows the relationship between different food chains in an single ecosystem
|
|
|
force
|
a push or pull that causes an object to move, stop or change direction
|
|
|
fossil
|
the remains or traces of past life, found in sedimentary rock
|
|
|
friction
|
a force that opposes motion between two surfaces that are touching
|
|
|
fulcrum
|
the balance point on a lever that supports the arm but does not move
|
|
|
galaxy
|
a grouping of gas, dust, and many stars, plus any objects that orbit those stars
|
|
|
gas
|
the state of matter that does not have a definite shape or volume
|
|
|
gravitational force
|
the force every object exerts on every other object
|
|
|
gravity
|
the force of attraction that exists between all objects in the universe
|
|
|
habitat
|
place where living things live that provides them with all their needs
|
|
|
heat
|
the transfer of thermal energy between objects with different temperatures
|
|
|
herbivore
|
an animal that eats only producers
|
|
|
igneous rocks
|
rocks that form when melted rock cools and hardens
|
|
|
inclined plane
|
a ramp or another sloping surface
|
|
|
inertia
|
the property of matter that keeps it at rest or moving in a straight line or keeps it at rest
|
|
|
investigation
|
a procedure carried out to gather data about an object or event
|
|
|
kinetic energy
|
the energy of an object in motion
|
|
|
lever
|
a bar that makes it easier to move things
|
|
|
life cycle
|
the stages that a living thing passes through as it grows and changes
|
|
|
light
|
radiation that we can see
|
|
|
liquid
|
the state of matter that has a definite volume but no definite shape
|
|
|
magnetism
|
the force produced by a magnet
|
|
|
mass
|
the amount of matter in an object
|
|
|
matter
|
anything that has mass and takes up space
|
|
|
metamorphic rock
|
rocks formed when high heat and great pressure change existing rocks into a new form
|
|
|
microscopic
|
too small to be seen without using a microscope
|
|
|
mixture
|
a blending of two types of matter that are not chemically combined
|
|
|
moon
|
any natural body that revolves around a planet
|
|
|
moon phase
|
one of the shapes the moon seems to have as it orbits Earth
|
|
|
nonrenewable resources
|
either a resource that cannot be replaced once it is used up, or a resource that takes a very, very long time to be replaced
|
|
|
organ
|
a group of tissues that work together to performs certain function
|
|
|
organism
|
any living plant, animal, or fungus that maintains various vital processes necessary for life
|
|
|
photosynthesis
|
the process in which plants make food by using water from the soil, carbon dioxide from the air, and energy from sunlight
|
|
|
physical change
|
a change in matter from one form to another that doesn't result in a different substance
|
|
|
planet
|
a body that revolves around a star
|
|
|
pollution
|
anything that dirties or harms the environment
|
|
|
population
|
a group of the same kind of living things, that live in the same place at the same time
|
|
|
potential energy
|
the energy of object has because of its shape or position
|
|
|
predator
|
an animal that kills and eats other animals for food
|
|
|
prey
|
an animal that is hunted and eaten by other animals
|
|
|
producer
|
a living thing, such as a plant, that makes its own food
|
|
|
protist
|
a single cell organism with a nucleus and organelles
|
|
|
pulley
|
a wheel with a rope that lets you change the direction in which you move the object
|
|
|
reflection
|
the bouncing of heat or light off an object
|
|
|
refraction
|
the bending of light rays as it passes from one material into another
|
|
|
renewable resource
|
a resource that can be replaced within a reasonable amount of time
|
|
|
resource
|
any material that can be used to satisfy a need
|
|
|
scientific method
|
a series of steps that scientists use when performing an experiment
|
|
|
Sedimentary rocks
|
rocks formed when sediments are cemented together
|
|
|
Solar system
|
a star and all the planets and other objects that revolve around it
|
|
|
Solid
|
the state of matter that has a definite shape and a definite volume
|
|
|
Solution
|
a uniform mixture of two or more substances in a single state of matter
|
|
|
Star
|
a huge ball of very hot gases in space
|
|
|
Sun
|
the star at the center of our solar system that is the primary source of energy for most living things
|
|
|
System
|
a group of separate elements that work together to accomplish something
|
|
|
Tissue
|
a group of cells that are alike and work together to do the same job
|
|
|
Topography
|
all the kinds of landforms in a certain place
|
|
|
Universe
|
everything that exists, including such things as stars, planets, gas, dust and energy
|
|
|
Volcano
|
a mountain made of lava, ash, or other materials from eruptions that occur at an opening in Earth's crust
|
|
|
Volume
|
the amount of space an object takes up; a measurement of how soft or loud a sound is
|
|
|
Water cycle
|
the process in which water continuously moves from Earth's surface into the atmosphere and back again
|
|
|
Weathering
|
the process of wearing away rocks by natural processes such as water, wind and ice
|
|
|
Wheel-and-axle
|
a wheel with a rod, or axle, in the center
|
