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Lesson 4: Just a Phase (Matter & Its Interactions)
Vocabulary for Smithsonian STC-MS Matter & Its Interactions Unit
Terms in this set (32)
The smallest unit of matter that cannot be broken down by ordinary chemical reactions.
The process by which a liquid turns into a gas at its boiling point.
The temperature at which a liquid turns into a gas.
A temperature scale with the melting point of ice at 0 degrees and the boiling point of water at 100 degrees. The divisions on the Celsius scale are the same sizes as those on the Kelvin scale.
The temperature at which a gas turns into a liquid.
A solid that contains atoms arranged in an organized way.
The variable in an experiment whose value is determined by the experiment. See also independent variable.
A labeled drawing that explains or shows the parts of something. A diagram is a type of model.
An atom that exists naturally in Earth that serves as a building block of all matter.
To change from a liquid to a gas at or below the boiling point.
A temperature scale with the melting point of ice at 32 degrees and the boiling point of water at 212 degrees.
The change in state in which a liquid turns into a solid.
The temperature at which a liquid turns into a solid.
A state (or phase) of matter in which a substance has no definite shape or volume.
A transfer of of thermal energy due to the temperature difference between two objects.
The variable in an experiment that the experimenter purposefully changes in order to determine its effect.
A temperature scale with the lowest possible temperature at the zero point, which is called absolute zero. On the Kelvin scale, ice melts at 0K.
Energy associated with moving objects.
A state (or phase) of matter in which a substance has a definite volume but no definite shape. Liquids take the shape of the part of the container they occupy.
A measure of the amount of matter in an object. In the metric system, mass is measured in kilograms (kg) or grams (g).
The phase change in which a solid turns into a liquid.
A tool scientists and engineers use to represent ideas or provide an explanation. Models may include diagrams, drawings, physical replicas, mathematical representations, analogies, or computer simulations.
Two or more atoms connected by a chemical bond.
A very small piece of matter. Particles include atoms and molecules.
The change of matter from one state to another, such as a solid, liquid, or gas.
Phase of Matter
Solids, liquids, and gases are three phases, or states, of matter.
A phase (or state) of matter in which a substance has a definite shape and volume.
State of Matter
Phases of matter may also be called states of matter.
The process by which a solid turns directly into a gas, skipping the liquid phase.
A group of objects that function together as one unit; also, the set of related objects under study or consideration.
The measure of how hot an object is. Temperature is measured using a temperature scale.
A form of kinetic energy associated with molecules in motion.
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