7.6(B) distinguish between physical and chemical changes in matter... and 7.7(B) illustrate the transformation of energy within an organism...

7.6(B) distinguish between physical and chemical changes in matter... and 7.7(B) illustrate the transformation of energy within an organism...

7.6(B) distinguish between physical and chemical changes in matter in the digestive system;
and
7.7(B) illustrate the transformation of energy within an organism such as the transfer from
chemical energy to heat and thermal energy in digestion; and
7.7(A) contrast situations where work is done with different amounts of force to situations
where no work is done such as moving a box with a ramp and without a ramp, or standing still;
Balanced Forces
Forces on an object
that do not change the
motion of the object.
Balanced Forces
Forces on an object
that are equal in size
and opposite in
direction. Cancel each
other and causes no
motion.
balanced forces
Equal forces acting on
an object in opposite
directions
Chemical Energy
energy stored in the
bonds of molecules
and compounds (all
living and once living
things)
chemical energy
Chemical to Electrical
Energy
Chemical to Electrical to
Light Energy
Chemical to Kinetic
Energy
Chemical to Thermal and
Light Energy
Chemical to Thermal,
Light and Sound Energy
Chlorophyll
green chemical that
plants use for
photosynthesis
chloroplast
structure in plant cells
where photosynthesis
happens
contact force
e.g car wheels on the
road, hitting a ball
with a bat, feet
pushing The ground
when you walk.
Electrical Energy
energy of moving
electrons
electrical force
a force that pulls
charged objects
Electrical to Thermal and
Light Energy
Electrical to Thermal
Energy
energy
the ability to do work
force
a push or a pull
Force
push or pull; causes
objects to move
forces
E.g: Car wheels on
road. Rockets. Heaps
of stuff :)
E.g: Car crash, falling
off a cliff, clobbered
in head by flying ball.
A force that resists
motion
forces can have a negative
effect.
friction
gravitational force
The force of attraction
between all masses in
the universe.
gravitational force
an attractive force that
acts between any two
objects
Gravity
a force that moves
rocks and other
materials downhill;
the force that pulls
objects toward each
other
Gravity is a pulling force
inclined plane
kinetic energy
energy an object has
due to its motion;
KE=1/2 mv^2
(Joules).
Law of Conservation of
Energy
energy can neither be
created nor destroyed;
energy just changes
form
Leaves
The part of a plant
where most
photosynthesis
takes place.
light energy
magnetic force
The attraction or
repulsion between
magnetic poles.
•
Mass
the property of a
body that causes it
to have weight in a
gravitational field
mechanical energy
energy in an object
due to its motion or
position, or both; sum
of kinetic and
potential energy in an
object that is used to
do work; ME=PE+KE
(Joules).
Newton
Unit of measurement
for force
non-contact forces
Nuclear Energy
Gravity, magnetism.
the energy locked in
the nucleus of an atom
Nuclear to Electrical
Energy
particle
a very small piece of
matter
Photosynthesis
The process in
which organisms
use water along with
sunlight and carbon
dioxide to make
their own food.
Plants use the sun's
energy to convert
water and carbon
dioxide into sugars
Photosynthesis
6 CO₂ + 6 H₂O→
C₆H₁₂O₆ + 6 O₂
The chemical reaction
which converts radiant
energy into chemical
energy in producers.
plants
Living things that
are producers. They
produce food
through
photosynthesis.
They take in carbon
dioxide and release
oxygen.
potential energy
energy an object has
based on its position,
shape, or condition;
stored energy;
PE=mgh (Joules).
radiant energy
solar or heat energy
which travels in waves
Radiant Energy
Solar Energy
sound energy
What forms of
energy: S.E.
spring force
The force exerted by a
compressed or
stretched spring upon
any object that is
attached to it.
thermal energy
heat energy
thermal energy
What forms of
energy: H.E.
unbalanced force
Forces acting on one
object that cause a
change in motion.
•
units that measure mass
weight
Kilograms, or grams.
A measure of the force
of gravity on an object
•
What would happen to
living organisms if there is
no energy?
Where do we get the
energy from?
The living things will
die
•
the food we eat
Why are plants green?
Because they reflect
green light and absorb
red and blue light
Work
force exerted on an
object that causes the
object to move in
same direction that the
force was applied
•
Work
Inclined Plane
Work = Force x Distance