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.com/watch?v=JUmT24R8CyA

• 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 Work③ 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.com/watch?v=JUmT24R8CyA

• 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 Stomata① 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