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Properties of Matter
Unit Test Flash Cards
17
Science
8th Grade
10/22/2009

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Cards

Term
Physical Change
Definition

A change in which the composition of a substance stays the same.  Usually (but not always) easily reversible.

ex: change of state, breaking, crushing

Term
Chemical Change
Definition

A change in which the composition of a substance changes.  Not easily reversed.

ex: rusting, burning, foaming or bubbling

Term
SI Unit for Weight
Definition
Newtons (N)
Term
SI Unit for Mass
Definition
Grams (g)
Term
SI Unit for Volume
Definition
Liters (L)
Term
SI Unit for Density
Definition

Grams over cubic centimeter

Kilograms  over liter

(several other posibilities)

 

Term
Weight
Definition

A measure of the gravitational force on an object.

Varies depending on where the object is in relation to Earth.

Measured using a spring scale.

Term
Mass
Definition

A measure of the amount of matter in an object.

Always constant for an object no matter where it is located.

Measured using a balance.

Term
Volume
Definition
A measure of the size of a body or region in three-dimensional space.
Term
Density
Definition

The ratio of the mass of a substance to the volume of the substance.

A substance in which this property is greater will sink.

 

Term
Finding volume of a regular object
Definition

Use a ruler to measure the lengths of the dimensions.

Find the appropriate formula for the shape (ex: v = l X w X h) and solve.

Term
Finding volume of an irregular object
Definition
Measure the volume of water that the object displaces. (Use a graduated cylinder and submerge the object to see what the change in the water's volume is.)
Term
Examples of Matter
Definition

Water, air, a rock

 

(anything that has mass and takes up space)

Term

Examples of non-matter

(things that are NOT matter)

Definition

Sunlight, sound, love

 

(anything that doesn't have mass or take up space)

Term

How Many significant digits?

0.0307

Definition
Three
Term

How Many significant digits?

430.0

Definition
Four
Term
Write a number with 2 significant digits.
Definition

Examples:

6,200

5.6

0.00097

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