Download Photosynthesis and Respiration Review

Photosynthesis and Respiration
Review
Ms. Dale’s 8th Grade Science
Photosynthesis and Respiration
Review Competition
Take 10 minutes to
QUIETLY review your
notes.
Members of the
winning team get a
peaks ticket and an
extra credit point
May the odds be
ever in your favor!
What is the source of all of
our food?
The sun!!!
What are t wo things we need
to sur vive that plants give
us?
Oxygen and Food!
What is photosynthesis
Photosynthesis- the process
by which a plant cell captures
energy in sunlight and uses it
to make food.
What does photosynthesis
mean in Greek?
photo=light
synthesis=to put together
List all the things a plant
needs to photosynthesize
Water
Carbon Dioxide
Energy from the Sun
Were plants the first
organisms (a living thing) to
develop photosynthesis?
No!
What organisms besides
plants can photosynthesize?
Algae (a type of protist) and
some bacteria
What part of the plant takes
in water?
The Roots! The water then
moves up the plant stem to
the leaves
What part of the plant takes
in carbon dioxide and releases
water?
The stomata which are found
on the underside of the leaf
What does photosynthesis
produce?
Glucose (sugar) and oxygen
What is the light color plants
don’t use?
Green! It is reflected from the
leaf and that is what our eye
sees. This is why plants appear
green.
What part of the plant does
photosynthesis occur in?
The leaf
(remember our
photosynthesis leaf models)
What is the sugar called that
is produced by
photosynthesis?
Glucose
What is one of the first
organisms to
photosynthesize that is still
around today?
Cyanobacteria is one of the first
organisms to photosynthesize.
Fossils of cyanobacteria in Australia
date back to 3.5 billion years ago
What plant organelle does
photosynthesis occur in?
The chloroplast
What is the pigment in
chloroplasts that is
responsible for absorbing
sunlight?
Chlorophyll
Why does the plant
photosynthesize?
To produce its own food
Plants use only about half of the
sugar they produce to grow.
What happens to the sugar the
plant does not use?
Leftover sugars are stored in stem,
seeds, fruit, and roots.
!
We obtain the energy from these plants
by eating the plant itself sometimes,
such as with bananas and and apples.
What are colored chemical
compounds that absorb light
called?
Pigments!
Chloroplasts and carotenoids
are types of pigments
Does soil provide the plant
with food?
No! Plants produce their own
food through photosynthesis
and get the water they need
for this process in the soil
What is the is the term
that describes lab
techniques that are used
to separate mixtures
Chromatography
!
We used rubbing alcohol and coffee filters
to separate pigments of leaves in our lab
What does chromatography
mean in Greek?
Chromo=color
!
Graphy=write
What is the chemical
equation for photosynthesis?
This is the chemical equation
for photosynthesis
light
6 H2O + 6 CO2 —-———-> C6H12O6 + 6 O2
How many stages are there in
photosynthesis?
Two!
!
There are t wo stages of
photosynthesis.
What is cellular respiration?
Cellular Respiration is the
process by which cells obtain
energy from glucose (sugar)
How many stages are there in
cellular respiration?
Two!
!
Cellular respiration has t wo stages. The first stage takes
place in cytoplasm and glucose is broken into smaller
molecules. The second stage takes place in the
mitochondria and the reaction requires oxygen and
releases a lot of energy
What cell organelle does
respiration take place in?
Mitochondria
What is mitochondria
sometimes called because it
creates energy?
Mitochondria is also called
the powerhouse of the cell!
What is needed (the
reactants) for cellular
respiration to occur?
Sugar and Oxygen
What is the chemical
equation for cellular
respiration?
This is the chemical equation
for cellular respiration
C6H12O6 + 6 O2 -> 6 H2O + 6 CO2 + energy
What is the process by which
a cell breaks down molecules
to release energy with OUT
using oxygen?
Fermentation.
Which releases more energy:
cellular respiration or
fermentation?
Cellular respiration releases
more energy than
fermentation
Do plants use cellular
respiration?
YES!!! All living things use cellular respiration
to live. That is how they get the energy to
carry out the functions of life. If you put a
plant in a bag it will collect water which is
one of the products of respiration.