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Matter
| Matter is anything
that takes up space and has mass; everything around us is made of
matter. The way the matter's molecules are placed determine what kind
of matter it is.
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States of Matter
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States of matter are the different forms of matter; there are three that we will focus on: solid, liquid and gas.
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| Solid |
Solids have a definite shape; their size and shape remain the same and their molecules cannot move.
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Liquid
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Liquids don't have a definite shape; they take the shape of their container and their molecules can move around.
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Gas
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Gases do not have a definite shape and their molecules are free and move around very fast.
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| Properties
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Properties
are used to describe matter and tell what it is like or what it can do.
Observable properties include color, flexibility, hardness, texture,
and absorbency.
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Energy
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Energy is the ability to do work. Energy is how things move and change. It is all around us and takes many forms.
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Potential Energy
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Potential Energy is energy that is stored.
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Kinetic Energy
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Kinetic Energy is energy that is moving. It is also called energy of motion.
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Friction
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Friction is the resistance of motion when objects rub against each other.
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Gravity
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Gravity is the force of attraction between two objects.
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Engineer
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An
engineer is a person who designs and builds products, machines,
systems, or structures. Engineers want to know how and why things work.
They have scientific training that they use to make practical things.
Often, they are presented with a problem and design a way to solve that
problem.
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