Hearne ISD
Science
Course: Eighth Grade
Course: Eighth Grade
Unit: Matter and Energy/Force and Motion
TEKS/Prerequisites
Guiding
Questions/
Specificity
Sample
Assessment
Designated Six Weeks: Second Six week
Days to teach: Matter and Energy – 10/Force and Motion - 20
Vocabulary
Instructional
Resources/
Strategies/ELPS
Weblinks
Unit Subtopic: Chemical Reactions
8.5(E) investigate how evidence of
chemical reactions indicate that new
substances with different properties
are formed; and
EOC READINESS
Days to teach: 4 days
Differentiate between
endothermic and
exothermic reaction?
What are the signs that
indicate a chemical
reaction?
Specificity:
Recognize that
formulas and equations
express what happens
in a chemical reaction.
Which of the following
gives evidence that a
chemical reaction has
taken place?
a. Water freezing to
ice
b. The color of the
wall changes from
red to green.
c. Potassium
dissolves in water.
d. Iron changing to
rust.
Precipitate
Stemscopes
E
Endothermic
Exothermic
xemplary Lesson
Evidence of Chemical
Reactions
TEKS: 8.5E
APPS:
Atom Builder
Nova Elements
Elements
Science Glossary
Video Science (Science House)
Jog Nog
Molecules
Khan Academy
Chemical
Lewis Dots
Recognize signs of
chemical change.
Evidence of a Chemical
Reaction
Teacher Notes:
Review previous TEK:
7.6B physical and
chemical changes in the
digestive system.
http://www.harpercollege.edu/tmps/chm/100/dgodambe/thedisk/che
rxn/signs.htm
Movie – Chemical
Reactions
Revised Spring 2014
Hearne ISD
Science
Course: Eighth Grade
Course: Eighth Grade
Unit: Matter and Energy/Force and Motion
TEKS/Prerequisites
Guiding
Questions/
Specificity
Unit Subtopic: Conservation of Mass
8.5(F) recognize whether a chemical
Guiding Questions:
equation containing coefficients is
balanced or not and how that relates
What is the law of
to the law of conservation of mass.
conservation of mass?
EOC SUPPORTING
Specificity:
Count atoms to
determine if chemical
equation is balanced or
not. At this grade level,
items that include
chemical equations will
focus on identifying
rearrangement of
atoms.
Students will not be
required to balance
chemical equations.
Sample
Assessment
Designated Six Weeks: Second Six week
Days to teach: Matter and Energy – 10/Force and Motion - 20
Vocabulary
Instructional
Resources/
Strategies/ELPS
Weblinks
Days to teach: 4 days
Which of the following
equations is correctly
balanced?
a. N2 + 3H2 → 2NH3
b. H2 + O2 → 2H2O
c. 2Ag2O → Ag2 + O2
d. N2 + H2 → NH3
Law of conservation
of mass
Stemscopes
Coefficient
Product
Exemplar Lesson
Conservation of Mass
TEKS 8.5F
Reactant
Yield
Photosynthesis Lab
Chemical equation
Chemical formula
http://ritter.tea.state.tx.us/
rules/tac/chapter074/ch07
4a.html
ELPS Student
Expectations:
 1E: learning logs
 5B: Cloze Sentences,
list/sort/label
Revised Spring 2014
Hearne ISD
Science
Course: Eighth Grade
Course: Eighth Grade
Unit: Matter and Energy/Force and Motion
TEKS/Prerequisites
Guiding
Questions/
Specificity
Sample
Assessment
Designated Six Weeks: Second Six week
Days to teach: Matter and Energy – 10/Force and Motion - 20
Vocabulary
Instructional
Resources/
Strategies/ELPS
Weblinks
Unit Subtopic: Balanced/Unbalanced Forces
Guiding Questions:
8.6(A) demonstrate and calculate
how unbalanced forces change the
speed or direction of an object's
motion;
EOC READINESS
What determines an
objects force?
What is the difference
between the motion of
an object in a balanced
force system or an
unbalanced force
system?
Specificity:
Identify gravity as a
force.
Review 6.8A compare
and contrast potential
and kinetic energy.
Utilize 7.7C as
examples of force –
emergence of seedlings,
turgor pressure, and
geotropism.
Revised Spring 2014
Days to Teach: 4 Days
When unbalanced
forces act on an object,
a. The object
accelerates
b. Friction becomes
greater than the net
force
c. The object speeds
up.
d. The net force
is zero
Speed
Stemscopes
Force
APPS:
Khan Academy
Jog Nog
CPO Science (Physical Science
Science 360
Video Science (Science House)
HSW HD (How Stuff Works)
Science Glossary
Pearson: Language Central for
Science
The illustration
provided shows two
boys pulling on
opposite ends of a rope
with different amounts
of force. What is the net
force on the rope?
Net force
Balanced force
Unbalanced force
Exemplar Lessons
Balanced and Unbalanced
Forces
TEKS 8.6A
Mass
Motion
GPE
http://www.exploratorium.edu/
s k ateboarding/trick.html
Movie – Bill Nye/Motion
a. 10 N to the left
b.10 N to the right
c. 90 N to the left
d. 90 N to the right
All About Motion and
Balance
The Physics of
Skateboarding Tricks
Hearne ISD
Science
Course: Eighth Grade
Course: Eighth Grade
Unit: Matter and Energy/Force and Motion
TEKS/Prerequisites
Guiding
Questions/
Specificity
Unit Subtopic: Speed/Velocity/Acceleration
Guiding Questions:
8.6(B) differentiate between speed,
What is the difference
velocity, and acceleration; and
between speed, velocity
and acceleration?
EOC SUPPORTING
How are speed,
velocity, and
acceleration
represented on a
distance vs. time graph?
Specificity:
Speed = distance/time
Use formula chart for
solving problems.
Interpret, extrapolate
and predict graphs of
motion.
Sample
Assessment
Designated Six Weeks: Second Six week
Days to teach: Matter and Energy – 10/Force and Motion - 20
Vocabulary
Instructional
Resources/
Strategies/ELPS
Weblinks
Days to Teach: 4 Days
If a car is moving on a
highway at 70
kilometers per hour,
going south, and then
turns to travel 70
kilometers per hour,
going east, what
happens to its speed and
velocity?
a. Speed - changing,
Velocity – constant
b. Speed - constant,
Velocity – changing
c. Speed - constant,
Velocity – constant
d. Speed - changing,
Velocity - changing
Stemscopes
Speed
Constant speed
Velocity
Acceleration
Exemplar Lesson
Speed, Velocity, and
Acceleration
TEKS 8.6B
Laying the FoundationsPhysical Science
Constant Speed Lab
Paper Airplane Lab
(Further and Faster)
Speed Calculation
Practice
Revised Spring 2014
Hearne ISD
Science
Course: Eighth Grade
Course: Eighth Grade
Unit: Matter and Energy/Force and Motion
TEKS/Prerequisites
Guiding
Questions/
Specificity
Unit Subtopic: Newton’s Three Laws of Motion
Guiding Questions:
8.6(C) investigate and describe
What are everyday
applications of Newton's law of
examples of Newton’s
inertia, law of force and
Three Laws?
acceleration, and law of actionreaction such as in vehicle
Specificity:
restraints, sports activities,
Teach to find all
amusement park rides, Earth's
variables in Force =
tectonic activities, and rocket
mass x acceleration
launches.
EOC READINESS
Newton’s First Law: if
all the forces acting on
an object are balanced,
the object will continue
in its state of
motion(straight line,
constant speed)
It is important for
students to understand
the interactive nature of
forces (3rd law) and the
predictive ability of 1st
law and 2nd law. It isn’t
necessary for them to
memorize the laws.
Sample
Assessment
Days to Teach: 4 Days
In which of the
following situations
will the ball have the
greatest acceleration?
a. A golf ball with a
mass of 0.045 kg is
struck with a force of
1N
b. A baseball with a
mass of 0.142 kg is
hit with a force of of
5 N.
c. A soccer ball with a
mass of 0.45 kg is
kicked with a force of
20 N.
d. A bowling ball with
a mass of 7.2 kg is
thrown with a force
of 60 N.
Revised Spring 2014
http://www.scienceclass.net/archive/scienceclass/Lessons/Physics/Coaster/r
ller_coaster.htm
Inertia
Vehicle restraints
Mass
Rollercoaster Activity
Acceleration
http://www.prometheanplanet.com
n-us/Resources/Item/41887/threelaws-of-motion - .U3OxZl5N3wI
Force
Solar energy
Biomass energy (ex.
corn)
Exemplar Lessons
Newtons’s Law
TEKS 8.6C
Electrical energy
Laws of motion notes
Chemical energy
Fossil fuels (C,O,N–
coal, oil, natural gas)
Which Law is It?
Mechanical energy
Thermal energy (heat
energy)
8.3D – history of science
and contributions of
scientists – Newton
**Earth Tectonics will
Designated Six Weeks: Second Six week
Days to teach: Matter and Energy – 10/Force and Motion - 20
Vocabulary
Instructional
Resources/
Strategies/ELPS
Weblinks
Nuclear energy (sun,
nuclear reactor)
Which energy
transformation occurs
Geothermal energy
Biography of Sir Isaac
Newton
http://www-groups.dcs.stand.ac.uk/~history/Mathematicians
Newton.html
Hearne ISD
Science
Course: Eighth Grade
Course: Eighth Grade
Unit: Matter and Energy/Force and Motion
TEKS/Prerequisites
Guiding
Questions/
Specificity
be addressed in the 4th
six weeks.
Practice using spring
scales.
Review 6.9C on energy
transformations.
Revised Spring 2014
Sample
Assessment
when a match is lit?
A Chemical energy to
heat energy
B Heat energy to
potential energy
C Electrical energy to
heat energy
D Kinetic energy to
potential energy
Designated Six Weeks: Second Six week
Days to teach: Matter and Energy – 10/Force and Motion - 20
Vocabulary
Instructional
Resources/
Strategies/ELPS
Weblinks
Hydroelectric energy
Hydroelectric power
plant
Wind turbine