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Chapter 1

Across
Changes that do not alter the identity of the substance.
The properties of a substance that can be measured without changing the identity of the substance.
The ability to do work.
A transition from the liquid phase to the gas phase.
A change that releases heat energy.
A change that absorbs energy.
Mixtures in which the components are evenly blended throughout.
A cyclical process of making observations, formulating new ideas, and then testing those ideas through experiments.
Mixtures in which the components are evenly blended throughout. Solution.
Substances composed of only one element or only one compound.
A transition from the solid phase to the liquid phase.
Changes that produce new substance; also called chemical reactions.
Down
A state of matter having a definite shape and a definite volume. The particles are held in fixed positions.
Pure substances composed of more than one element in a fixed ratio.
A state of matter having definite volume but no definite shape. The particles are close together but move freely past each other.
Changes that produce new substances; also called chemical changes.
Mixtures in which the components are not evenly blended throughout.
Anything that has mass and takes up space.
A transition from the liquid phase to the solid phase.
An idea that has been tested and refined; also a way of thinking about a particular topic.
A substance made of only one type of atom.
The fundamental units of matter.
A state of matter that does not have a definite shape or a definite volume. The particles in a gas move freely with very little interactions.