Download Energy for Life

Unit 4 – Lesson 3
 How
to plant cells get their energy to
grow?
 How do animal cells get their energy to
move?
 WE
GET IT ALL FROM OUR FOOD!
• But, does everything eat?
Nutrition
• Producers – organisms that have cells which make their
own food.
• Consumers – organisms with cells that can’t make their own
food.
 We
see that plants can MAKE their
food…but how?
 Go
back to cells…remember chloroplasts?

Photosynthesis is when the chloroplasts take:
sunlight + water + carbon dioxide
and make…
oxygen and sugar (glucose) (oh hey, that’s food!)
Animals consume the sugars
plants make – or they consume
other animals that rely on plants.
Animals could not exist without
plants or photosynthesis!

Once the plant makes its food
by photosynthesis – it can
break it down into energy!
This makes the plant grow!

Once the animal eats, it digests
the food and breaks it down
into energy! This makes the
animal grow!
 The
food that plants and animals
make/eat is VERY complex, so it needs to
be broken down into simple units by
enzymes.
 Once
the food is broken down, what
happens next? It gets turned into ENERGY!
 Go
back to cells…Remember the
mitochondria?
Mighty Mighty
Mitochondria
Hey Guys!
Remember
Me!?

Respiration occurs in the mitochondria of a cell. It
takes:
glucose + oxygen
and turns it into…
water + carbon dioxide + ATP

Respiration and Photosynthesis use the
same stuff. However their processes are
opposite each other.
 They both use
• Water
• Carbon Dioxide
• Glucose
• Oxygen
• Energy
 The
two processes are almost opposites
of each other.
• Photosynthesis produce sugars (glucose) and
oxygen, which are used in respiration.
• Respiration produces carbon dioxide and water,
which are used in photosynthesis.
CO2 + H2O + SUNLIGHT  C6H12O6 + O2
CO HO GO!
GO CO HO!
C6H12O6 + O2

CO2 + H2O + ATP