Photosynthesis & Respiration
Energy for Plants & Animals
Essential Standards
• 6.L.1 Understand the structures, processes
and behaviors of plants that enable them to
survive and reproduce.
Clarifying Objectives
• 6.L.1.2 Explain the significance of the
processes of photosynthesis, respiration, and
transpiration to the survival of green plants
and other organisms.
Essential Question
• How do Photosynthesis, Respiration &
Transpiration relate when discussing plants &
other organisms?
• What is the process of photosynthesis?
• What is the process of respiration?
• What is the process of transpiration?
Animals vs. Plants
• Animals cannot make their
own food and survive on their
own
• Animals either have to eat
plants or other animals to
survive
• Plants CAN make their own
food
• This is why PLANTS are the
beginning of the FOOD CHAIN
Sun’s Energy
• All energy comes from the
sun either directly or
indirectly
• Energy comes from the sun
directly to plants as they
use the sunlight in
photosynthesis
• Energy comes from the sun
indirectly to animals
through eating plants (that
got their energy from the
sun) or other animals
Photosynthesis
• Plants food making process
• Photosynthesis is a chemical
reaction where ENERGY
from light (sun) is changed
to CHEMICAL ENERGY which
plants can use
• The converted chemical
energy is turned into sugar
which is called glucose
Light, Water, Carbon Dioxide
• All plants need three
things to grow
– Light (sun)
– Water (rain)
– Carbon Dioxide
(Atmosphere)
Chloroplasts & Chlorophyll
• Photosynthesis takes place
in a tiny piece of the plant
called the Chloroplast
• Chloroplasts have
Chlorophyll in them
• This is what gives the leaves
of the plants their green
color
• Chloroplasts are located in
the leaves of the plants
Sunlight
① Sun shines down onto a
plant
② The sunlight shines onto
the leaves of the plant
which is where the
Chloroplasts are
③ The Chlorophyll in the
leaves trap the sunlight
to make sugar
Carbon Dioxide & Water
④ Next the plant takes in
Carbon Dioxide
through the Stomata
in the leaves
⑤ Next the Water is
taken from the ground
through the plant’s
root system
Water + Carbon Dioxide + Sunlight
⑥ The water from the
roots combine with the
Carbon from the
atmosphere and the
sunlight from the sun to
make GLUCOSE (sugar
energy)
⑦ The plant then stores
the glucose in the stem
& flower of the plants
Plant Waste = Oxygen
⑧ When these three
combine they don’t
use everything and
some of it is turned to
waste and given off
back into the
atmosphere. This
waste is called Oxygen
Photosynthesis Video
• http://www.youtube.co
m/watch?v=JUmT24R8
CyA
• 4:03-5:00
Essential Question
• Get with a partner and answer…
• What is the process of photosynthesis?
Respiration
• Respiration is another
chemical reaction that
works with
photosynthesis
• It is the opposite of
photosynthesis
• It released energy to
organisms and its waste is
Carbon Dioxide
Animals Eat & Breathe
① Animals eat a plant or
another animal and
get glucose from that
plant or animal they
ate
② Animals breathe in the
oxygen that the plant
gave out as waste
Mitochondria goes to Work
③ The glucose (sugar) (carbs)
and the oxygen travel to
the Mitochondria which is
part of each animal cell
④ Mitochondria breaks down
the oxygen & glucose
(carbs) and releases water
vapor & carbon Dioxide
into the air
⑤ At the same time it
releases energy into the
cell
Respiration Video
• http://www.youtube.co
m/watch?v=JUmT24R8
CyA
• 6:15-8:52
Essential Question
• Get with a partner and answer…
• What is the process of Respiration?
Transpiration
• Transpiration is when plant
leaves open their cells to
take in carbon dioxide and
lose water to evaporation
– Stomata & guard cells open
– Water Evaporates
– Carbon Dioxide enters the
plant
• Transpiration is important
because it moves the water
throughout the plant
Opening the Stomata
① Plant opens the Stomata
of the leaf to let water
vapor out & Carbon
Dioxide in
② The plant immediately
wants to replace the water
it lost through the stomata
③ Transpiration makes the
roots suck more water
from the ground
Moving through the Plant
④ Transpiration bonds
the water molecules
together & the Xylem
sucks the water up
through the stem & all
the way to the flower
(working against
gravity)
Essential Question
• Get with a partner and answer…
• What is the process of Transpiration?
How do they Relate
•
Photosynthesis & Respiration use
each other to continue their process
•
In order to complete Photosynthesis
the plant must have Carbon Dioxide
which they can only get from animal
respiration
•
In order to complete Respiration the
animal must have Oxygen which it
gets from the plant when the plant
goes through photosynthesis
•
In order for Transpiration to occur the
plant must take in carbon dioxide
from respiration
Essential Question
• Get with a partner and answer…
• How do Photosynthesis, Respiration &
Transpiration relate when discussing plants &
other organisms?
EOG Questions
• Leaves perform many tasks and are important
to the survival of plants.
• How is transpiration controlled in the leaves of
a plant?
• Explain why transpiration is important to the
survival of the plant.
Important Points
• Plants are the beginning of
the FOOD CHAIN
• Photosynthesis &
Respiration work together &
relate to each other
• Photosynthesis combines
Carbon+Water+Sunlight to
give the plant energy
• Respiration breaks down
glucose + Oxygen and
releases energy in the
process
• Photosynthesis takes place
in the Chloroplasts which is
inside the plant cells
• Respiration takes place in
the Mitochondria which is
inside the animal cells