Chemical%20and%20Physical%20Changes

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Chemical and Physical Changes

• How can matter be changed?
• How are mass and weight different?
• Why does the mas of an object remain the same
  regardless of its location?
• How can I tell if matter has undergone a chemical
  or a physical change?
• How do different forms of water exist on Earth?
• How can matter change by just looking at it?

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Matter
Anything that has mass and takes up space.
The physical properties of matter are size,
shape, texture, odor, and state.
Matter can be observed in three different states
gas, liquid, or solid.
Mass
The amount of matter in an object
Volume
The amount of space that matter takes up.
Weight
The measure of the pull of gravity on an object
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The further away an object is from the center of
Earth (gravitational pull) the less the object
will weigh.
However, the mass of an object does not depend on
the gravitational pull.
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Physical Properties
Any sample of matter can be described by its
physical properties color, shape, texture,
luster, and density
Density describes how much matter is in a given
space, or volume. The density of a substance
determines whether it will float or sink in water.
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Chemical Properties
Is a characteristic of matter that can be
observed only when matter is changed into a new
kind of matter such as burning, rusting or
tarnishing, exploding, or changing of color.
Chemical Properties refers to how matter reacts
with air, water or heat.
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Physical Changes
A Mixture is matter made up of two or more
substances that are combined physical, but can be
separated.
A solution is a mixture in which the particles of
the parts are mixed thoroughly and evenly. A
solution has the same properties throughout.
Other Physical Changes are cutting, folding and
tearing.
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Chemical Changes
A chemical change is a change in matter that
produces new kinds of matter with different
properties.