Photosynthesis

November 12 & 13

Do Now• Turn in “Yellowstone Food Web Analysis”• Begin working on today’s warm-up on your

tracker

What do plants need to survive?

Food Webs & Energy Flow Concept Check

Objective

• Diagram the inputs and outputs of photosynthesis

By the end of class, students will be able to:

Food webs show flow of energy

Organisms that eat other organisms for food are called….?

Heterotrophs or Consumers

Organisms that make their own food are called ….?

Autotrophs or Producers

Where do plants get their energy?

Important!• Plants do not make their own energy; they

capture energy from the sun!• Plants do not make their own energy; they

capture energy from the sun! • Plants do not make their own energy; they

capture energy from the sun!

Photosynthesis• The process by which algae and plants use

sunlight energy to make SUGAR.

Photosynthesis• Photo = “Light”• Synthesis = “To make”• Photosynthesis = “To make with light”

Photosynthesis takes place in structures called chloroplasts

What are the two steps of photosynthesis?

• Step 1: Collect light energy• Step 2: Use energy to make glucose

Step 1: Collect light energy

A pigment called chlorophyll absorbs

light energy from the sun

Step 2: Use energy collected by chlorophyll to make sugar (glucose)

C6H12O6• 6 carbon atoms• 12 hydrogen atoms• 6 oxygen atoms

The carbon comes from carbon dioxide (CO2)

CarbonOxygen

Oxygen

Carbon dioxide enters through holes in the leaf called stomata

The hydrogen comes from water (H2O)

Oxygen

HydrogenHydrogen

Water enters through the

roots and travels to the

leaves through tubes called

xylem

Water + Carbon Dioxide + Energy Sugar + Oxygen

+ + +

INPUTS OUTPUTS

Glucose is transported to the roots for storage

Oxygen is a waste productIt exits through the stomata

Your partner (Period 3)• Myesha & Elmer• Rina & Joseph• Maurice & Eric• Marlizha & Freddie• Khamal & Sheldon• Maia & Yeman’e

• Reid & Kobe• Umani & Gloria• Khalil & Ramiro• Shea & Nick• Fernie, Alina & Alexus

Your partner (Period 5)• Ulises & Keshawna• Ricardo & Brandon• Aliyah & Janeida• Nakya & Nathithong• Brittany & Keima

• Ernest & Rukiya• Marquise & Kena’• Ryan & Alex• Carlos & Lahmad

Your partner (Period 2)• Ja’Von & Jamal• Xander & Gabriel• Amanda & Dionoris• Michael J & Michelle• Nick & Diana• Leo & Michael D

• Junior & Sean• Eunique & Naidjah• Melba & Asia• Michael G & Erick• Johnny D & Alex• Bianca & Desiree

Your task• Step 1: Complete

photosynthesis packet• Step 2: Get packet checked

by instructor• Step 3: Create

photosynthesis poster– Consult rubric for complete

details– Due 15 minutes before the

end of the period

Food webs in the deep ocean• Sunlight only penetrates 200 meters of water

Food webs in the deep ocean

• Most deep-sea life is indirectly dependent on sunlight

Food webs in the deep ocean• But not all of it!

Chemosynthesis

• Energy from breaking down chemicals from volcanic vents

Exit ticket• Why is it wrong to say “plants make energy.”

Turn in your tracker before you leave!!!!!!