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Unit 1 Lessons 1, 2, & 3
Introduction to Matter
10
Science
7th Grade
09/16/2014

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Term
Matter
Definition
Anything that has mass and takes up space.
Term
Mass
Definition
The amount of matter in an object.
Term
Weight
Definition
A measure of the gravitational force on an object.
Term
Volume
Definition
The amount of space an object takes up.
Term
Density
Definition
A measure of the amount of mass in a given volume.
Term
Physical Property
Definition
A characteristic of a substance that can be observed or measured and the substance does not change.
Term
Chemical Property
Definition
Describes a substance's ability to change into something different.
Term
Physical Change
Definition

When this type of change occurs, the chemical identity of the substance remains the same.

Term
Chemical Change
Definition
When this type of change occurs, new substances are formed.
Term
Law of conservation of mass
Definition
During ordinary chemical and physical changes, mass is not created or destroyed, but is only transformed into different substances.
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