Download Plants, Transpiration, Photosynthesis and Respiration

Plants, Transpiration,
Photosynthesis and Respiration
Vocabulary
Tier 2: distinction, consume, complementary, processes, energy, products, guard,
regulate
Tier 3: organism, photosynthesis, respiration, glucose, carbon dioxide, oxygen,
chlorophyll, epidermis, cuticle, stomata, guard cells, transpiration
Parts of a Flower Review
YOU MUST KNOW THESE PARTS & FUNCTIONS
1. Stamen
2. Stigma
3. Ovary
4. Petals-bright and odor
5. Pistil
6. Anther
7. Ovule
8. Pollen grains
9. Sepals
Interactive Parts of the Flower
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http://www.bbc.co.uk/schools/scienceclips/ages/9_10/life_cycles.shtml
Today’s Learning Goals
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Transpiration(water loss through stomata) regulated by the
guard cells through their opining/closing
Leaves have epidermis with cuticles and stomata to prevent
water loss; guard cells control the opening of the stomata
In plants, chlorophyll (found in chloroplasts) captures
energy from the sun in order to make food during
photosynthesis
Photosynthesis and cellular respiration are complementary
processes:
Plants carry on photosynthesis/respiration where food is broken down into energy
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Plants make their own food through photosynthesis, animals
consume energy rich food
Transpiration
Brain Pop
http://www.brainpop.com/science/cellularlifeandgenetics/plantgrowth/
Critical Thinking:
Transpiration
Transpiration—stoma are
small openings on the
underside of leaves which are
used for gas exchange, (O2 &
CO2). Guard cells on each
side help open & close stoma.
Plants also lose water through
the stoma. So, stoma are
usually closed during the
hottest part of the day so they
don’t lose so much water.
Plants only use about 10% of
the water they absorb from the
Earth. The rest is released
into the atmosphere through
transpiration.
1.
Do you think plants would lose more water to
transpiration in windy conditions or non-windy
conditions?
2. Do you think plants would lose more water to
transpiration in humid conditions or dry
conditions? Why?
3. Explain how plant transpiration contributes to the
water cycle.
4. Where on Earth would you find the most
transpiration? Why? Do you think this has an
effect on climate?
5. What would be the effect if humans were to plant
a huge number of leafy trees in one county of
North Carolina. They would plant so many there
they would cover the land. Do you think
conditions there would be different? Why or why
not?
Photosynthesis
Media Clips
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Discovery Education
Video
Photosynthesis
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Brain pop
Photosynthesis
How Does a Plant Make It’s Own
Food?
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Plants use carbon dioxide (CO2), water (H2O), and
sun’s energy to make food.
This is called “photosynthesis”
The food gives plants energy
Animals get the
energy stored in
plants when they
eat them.
How Do Plants Get Energy From Sun?
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Plants have pigments that
absorb energy from light
Chlorophyll (found in
chloroplasts) is the pigment
used in photosynthesis
What “Food” do Plants Make?
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The “food” plants
make is a sugar
called glucose
(C6H12O6).
Glucose and oxygen
(O2) are made during
photosynthesis.
How Do Organisms Get Energy
From Food?
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Animals cannot make their own food like plants can.
But, BOTH plants and animals must break down
(digest) food in order to get energy from it (so they
can live, grow, & develop)
Cells do this 2 ways: cellular respiration and
fermentation
Check It Out!
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Did you notice
that cellular
respiration is just
the opposite of
photosynthesis?
Photosynthesis
Rap
Photosynthesis
Song
Today’s Learning Goals
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Transpiration(water loss through stomata) regulated by the guard cells
through their opining/closing

Leaves have epidermis with cuticles and stomata to prevent water
loss; guard cells control the opening of the stomata

In plants, chlorophyll (found in chloroplasts) captures energy from
the sun in order to make food during photosynthesis


Photosynthesis and cellular respiration are complementary processes:
Plants carry on photosynthesis/respiration where food is broken down
into energy
Plants make their own food through photosynthesis, animals consume
energy rich food
Photosynthesis and Respiration in
Aquatic Plants
1. Read and annotate the Photosynthesis and
Respiration article
http://www.aquariumlife.net/articles/aquatic-plants/pjotosynthesis-respiration-aquatic-plants/152.asp
2. Use the information from the article to
Explain why it is important for an aquarium
owner to be very careful in how s/he sets up
his or her aquarium.