The process of changing from a gas to a liquid; the act of making more dense or compact.
100
What is a change of state?
A physical change that occurs when matter changes to another state (liquid, gas, or solid).
100
What is an experiment?
A procedure that is carried out and repeated under controlled conditions in order to discover, demonstrate, or test a hypothesis; includes all components of the scientific method.
100
What is force?
A quality that tends to produce movement or acceleration of a body in the direction of its application; a push or a pull.
100
What is an electron?
A stable elementary particle that is negatively charged and orbits the nucleus of an atom.
200
What is energy?
A quantity that describes the capacity to do work; a source of usable power.
200
What is mass?
The amount of matter an object contains.
200
What is a variable?
The event, condition, or factor that can be changed or controlled in order to study or test a hypothesis in a scientific experiment.
200
What is frequency?
The number of cycles or waves per unit time.
200
What is an element?
A substance that cannot be reduced to a simpler substance by chemical means.
300
What is heat?
A form of energy resulting from the temperature difference between a system and its surroundings.
300
What is gas?
One of the fundamental states of matter in which molecules do not have fixed volume or shape.
300
What is a system?
A set of objects, organisms, or different parts acting to form a whole.
300
What is friction?
A force that opposes the relative motion of two material surfaces in contact with one another.
300
What is a neutral?
A particle, object, or system that lacks a net charge.
400
What is potential energy?
Energy stored in an object due to the object’s configuration and position.
400
What is a physical change?
A reaction; a change in matter from one form to another, without forming new substances.
400
What is a scientific method?
A plan of inquiry that uses science process skills as a tool to gather, organize, analyze, and communicate information.
400
What is gravity?
The observed effect of the force of gravitation.
400
What is a neutron?
A subatomic particle having zero charge, found in the nucleus of an atom.
500
What is kinetic energy?
The energy possessed by a body because of its motion.
500
What is a wedge?
A type of simple machine that consist of an inclined plane used to separate two objects.
500
What is an investigation?
A procedure that is carried out in order to observe a response caused by a stimulus; not a complete experiment.
500
What is inertia?
The property of an object, due to its mass, that cause it to resist any change in its motion unless overcome by a force.
500
What is a proton?
A subatomic particle having a positive charge and which is found in the nucleus of an atom.