Objective Photosynthesis Essential Question How do plants go

Objective: Photosynthesis Essential Question: How do plants go through photosynthesis to make their own food?

Carbon moves from atmosphere to plants to animals and back to atmosphere. Oxygen (O 2)

Plants Make Their Own Food: A Recipe for Photosynthesis

Plants: One Part of the Carbon Cycle When carbon dioxide is taken in by plants, what is that called? PHOTOSYNTHESIS!

Photosynthesis is How Plants Make Their Food Plants do not need to go to the cafeteria for lunch! They do need a few special ingredients, though…

What is needed for photosynthesis to occur? Carbon Dioxide (CO 2) The plant’s leaves take in CO 2 that is breathed out by animals (and people). CO 2

What is needed for photosynthesis to occur? Light The plant’s leaves use the light to make a sugar called glucose.

What is needed for photosynthesis to occur? Water The plant’s leaves and roots soak up water to use for photosynthesis.

What is MADE by plants as a result of photosynthesis? Water Plants release water through their leaves. This is called transpiration!

What is MADE by plants as a result of photosynthesis? Oxygen (O 2)

What is MADE by plants as a result of photosynthesis? Sugar (Food) Plants make their own food by performing photosynthesis

A Formula for Photosynthesis Sun + CO 2 + Water = Food + O 2 + Water Sun + + CO 2 Plant Food + = Water O 2 +

It’s question time! What is the process by which plants make food? * Photosynthesis is the process by which plants make food. A green plant makes food using light energy. Green plants get light energy from the sun.

Look at this picture of the desert. It is very dry and does not rain much here. Why do you think there are not many plants in the desert? Plants need water to do photosynthesis (to make their food).

Now it’s YOUR TURN Plants Need 3 factors plants need Plants Make 3 factors plants make

PHOTOSYNTHESIS Plants Need Plants Make Sunlight Sugar (Food) Carbon Dioxide (CO 2) Oxygen (O 2) Water

Draw… Draw a Plant. Show the: 3 factors that plants need for photosynthesis AND 3 factors plants make from photosynthesis

SUGAR WATER

WHY IS PHOTOSYNTHESIS SO IMPORTANT? PHOTOSYNTHESIS is one of the most important biological process on earth! • Provides the oxygen (O 2) we breathe • Consumes extra Carbon Dioxide CO 2 • Makes Plant Food • Gives US food!

What is photosynthesis? ? • The way plants make their food (sugar)

Why do plants need sugar? • Sugar (Glucose) is the food for the plant. • It gives the plant energy to grow.

HOW do plants MAKE sugar? To perform photosynthesis, green plants need. . . CHLOROPHYLL! (Chlorophyll is the green material in plants that stores sunlight for plants to make food)

What part of the plant produces food? In most plants the leaves are the special parts where the most food is made. Leaves contain a chemical called chlorophyll. Chlorophyll is the green matter in plants that traps light energy to produce food.

How Are Plants and Animals Different? • Plants can make their own food. • Plants have chlorophyll • Animals cannot make their own food. • Animals do NOT have chlorophyll (even green animals don’t have it!)

Plants use water, sunlight and carbon dioxide to make food. This is called… photosynthesis Only organisms with the green material CHLOROPHYLL can perform photosynthesis.

WHY DO LEAVES CHANGE COLOR IN THE FALL? Plants make their own food. They take water from the ground through their roots. They take a gas called carbon dioxide from the air. They turn water and carbon dioxide into food using sunlight and something called chlorophyll. Chlorophyll is green. It gives leaves their green color. Winter days are short and dry. Many plants stop making food in the fall. The chlorophyll goes away. Then we can see orange and yellow colors. These colors were in the leaves all summer, but the green covered them up. Some leaves turn red. This color is made in the fall, from food trapped in the leaves. Brown colors are also made in the fall. They come from wastes left in the leaves.

Photosynthesis: Plants make their food Sun + CO 2 + Water = Food + O 2 + Water

Photosynthesis: Plants make their food Plants Need -Carbon Dioxide -Water -Sunlight Plants Make -Oxygen -Water -Food Sun + CO 2 + Water = Food + O 2 + Water

Why can plants make their food? ? Plants have chlorophyll -Green -Stores Sunlight -Only plants have it. This is why plants can use sunlight to make food

Plants Make Their Food with Chlorophyll Word to know: Chlorophyll: The green material in plants that stores sunlight for plants to make food (by photosynthesis) Why are plants green? Because plants have chlorophyll Why can plants make their own food? Because plants have chlorophyll How do plants use the sun to make food? Chlorophyll absorbs sunlight Why aren’t people green? Because people don’t have chlorophyll Why can’t people make their own food? Because people don’t have chlorophyll

Draw A Comic Strip Explaining Photosynthesis Be creative! 1. Must have a picture in every square 2. Must use all of the following words: • Photosynthesis • Chlorophyll • Carbon Dioxide • Sunlight • Water • Food ***BONUS: If you get done early, -Add color to your drawing -Add another box to your comic for more detail

Photosynthesis Review Bromothymol blue. When is it yellow? When there is Carbon Dioxide present When is it blue? When oxygen is present What do plants make? Oxygen What color will this make Bromothymol Blue? Blue, because oxygen is present

Photosynthesis Review A producer is placed in a jar containing water and bromothymol blue. The water is yellow. After one day in the sunlight, what color would the water be? Blue, because plants release oxygen A producer is placed in a jar containing water and bromothymol blue. The water is blue. After one day in the sunlight, what color would the water be? Blue, because plants release oxygen