Transcript Atoms - TCET

Science Module
th
8
Grade
TEKS 8.8 A and B
The student knows that matter is composed
of atoms. The student is expected to:
A. describe the structure and parts of an
atom; and
B. identify the properties of an atom
including mass and electrical charge.
Objectives
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The learner will be able to describe the parts
of an atom.
The learner will be able to compare mass
and charges of the electron, proton, and
neutron.
The learner will use appropriate models and
analogies to describe the size of an atom
and its particles.
The learner will explain how scientists are
able to discover the properties of an atom.
Atoms and Models
Because atoms are so small and strange to
us, we represent them by models. The
following activity on modeling brings to light
some of the limitations of models.
Models
Activity in Chapter One on making models
A Tiny Big Discovery
Engage
Cut a piece of paper in half as many times
as you can.
1
2
3 4
Explore
The “Black” box activity is important on
several levels:
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Students explore studying things they
cannot see or directly touch.
Students share information with others to
expand and check results.
Students learn that scientists cannot
check for the right answer (Keep the box
closed and never reveal what is inside!)
Explore
Who knew? is an activity designed to help
students understand how science is built
upon the investigations of previous scientists
and determined in large part by the
technology available.
Explain
The animation explains how theory of the
atom moved from the Bohr model to the
modern theories. It also shows the position
and structure the atom and its components.
Explain
This animation shows the Scanning
Tunneling Microscope (STM) mapping
atomic clouds in the silicon material. The
STM uses a needle with a single atom on
the tip to “see” the silicon atoms by their
charged electron clouds.
Explain
The atom is composed of mostly empty space.
electron
Show the
Atomic Field Video
neutron
proton
Explain
Electrons are very small compared to a
proton.
If the proton were the mass of an
automobile, the electron would have the
mass of a bag of potato chips.