Concepts To Be Addressed
Objects have properties determined by the forms, amounts,
and properties of materials of which they are made.
Some properties of an object can be determined by the form
of the material.
Cleavage of a mineral such as calcite.
Properties of an object can be affected by the size of solid
particles contained within the material.
Texture or feel of sandstone compared to shale rock.
Some properties of an object may be determined by the amount
of material in an object.
The mass of pumice compared to the specific gravity of
Energy can vary in form, amount, and ability to move through
materials and space.
Energy can exist in several forms.
Anthracite burns producing heat energy.
Energy can move from one object to another through materials
Electricity moves more easily through some materials such as
WITHIN SYSTEMS THE INTERACTIONS OF MATERIALS AND ENERGY
CHANGE THEIR FORMS AND PROPERTIES. A GROUP OF INTERACTING OBJECTS IS CALLED A SYSTEM.
Energy can be changed in form by interactions with
Chemical energy in anthracite is changed by burning to new energy
forms, heat, and light.
Energy in a particular form can be transferred from one
object to another in a system.
Magnetism can be cause in some kinds of materials by
When energy interacts with objects in a system the
properties of the objects may be changed.
The shape of rocks can be changed by forces.
Forces may break up, compact, or wear away rocks.
Chemical reactions such as acid on marble may change the properties
ENERGY MAY EXIST WITHIN A MATERIAL OR IN THE POSITION OR
MOTION OF THE OBJECTS.
Energy within the materials of objects may be transferred
Electrical energy can flow through circuits.
The amount of energy transferred during a flow of electrical
energy depends on the source and properties of the object to which it is applied.
Some rocks (minerals) allow electricity to be transferred
through them, such as galena.
The interactions of materials may produce new materials and
energy may be absorbed or given off.
New materials produced by interactions have properties that
are different from the old material.
Marble produced from limestone.
Some interactions that give off energy may require some
energy to start the interaction; others start with no energy being added.
A volcano needs heat to be added before the volcano will
Limestone and hydrochloric acid require no energy to be
added to interact.
Energy may be given off when new materials are being
Hydrochloric acid mixed with limestone.
Energy can be transferred by changing the position of
Forces are exerted by liquids and gases.
A liquid or gas in a closed container exerts force on the
walls of the container.
Magma erupting from a volcano.