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53 Cards in this Set
- Front
- Back
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Chemical Change
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a change that occurs in substances that cannot be reversed or undone, such as a piece of wood burning
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Circuit
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A closed path through which electricity travels.
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Conductor
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Material that allows energy to travel through it easily or quickly
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Cycle
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A system that repeats its steps over and over again
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Energy
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The ability to do work; the ability to cause change and make things happen.
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Friction
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A force that opposes, or acts against, motion when two surfaces rub against each other.
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Force
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A push or pull on an object
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Gas
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A state of matter in which the molecules are very far apart
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Inertia
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The tendency of a moving object to keep moving or of a still object to remain at rest.
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Inexhaustible resource
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A resource that cannot be used up.
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Insulator
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Material that prevents energy from traveling through it easily or quickly
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Lens
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An object used to refract light
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Liquid
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The state of mattter that has a definite volume and takes the shape of the container it is placed in, such as water.
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Magnet
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Tool used to determine the force of push or pull that an object has
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Magnetism
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The force of push or pull between the poles of magnets
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Mass
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The amount of matter in an object
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Matter
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Anything that has mass and takes up space
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Mixture
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A collection of materials in which the materials do not join together
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Molecule
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The units that make up matter in its soilid, liquid, or gas forms
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Motion
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Change in an object's position
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Reflection
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The bouncing of light from a surface, such as a mirror
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Refraction
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The bending of light, such as in eyeglasses
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Solid
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A state of matter in which the molecules are tightly packed together
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Solution
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A type of mixture in which the ingredients are thoroughly mixed together
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Sound
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A form of energy in which vibrations can be heard
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Vibration
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The back-and-forth movement of an object that produces sound
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Wave
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The way in which light and sound energy travel
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Weight
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The measure of the pull of gravity on an object
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melting point
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the temperature at which a solid changes to a liquid, 0 degrees C
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boiling point
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the temperature at which a liquid becomes a gas, 100 degrees C
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freezing point
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the temperature at which a liquid changes to a solid, 0 degrees C
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expand
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To increase the size, volume, quantity, or scope of; enlarge
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contract
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To reduce in size, as by drawing together
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suspension
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a mixture in which the particles separate easily
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colloid
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homogeneous mixture with particles larger than a solution, but smaller than a suspension
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absorption
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the process by which some materials change light energy into heat energy
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echo
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Repetition of a sound by reflection of sound waves from a surface.
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concave
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Curved like the inner surface of a sphere.
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convex
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Having a surface or boundary that curves or bulges outward, as the exterior of a sphere.
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light ray
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a straight-line beam of light as it travels outward from its source
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opaque
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blocking the passage of light
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transparent
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allowing light to pass through easily
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translucent
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scattering light that passes through
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component
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serving as one of the parts of a whole
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biome
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One of Earth's largest ecosystems, with its own kind of climate, soil, plants, and animals
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chlorophyll
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a green chemical in plant cells that allows plants to use the Sun's energy for making food
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fertilization
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the joining of a female sex cell and a male sex cell into one cell, a fertilized egg
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germination
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the sprouting of a seed into a new plant
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perish
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to be destroyed, ruined or wiped out
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environment
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The combination of external physical conditions that affect and influence the growth, development, and survival of organisms:
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organism
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An individual form of life, such as a plant, animal, bacterium, protist, or fungus; a body made up of organs, organelles, or other parts that work together to carry on the various processes of life.
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consumer
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a user
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mimicry
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an animal's use of its appearance to look like a different, unpleasant animal as a protection against predators
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