Bell Work:

Diffusion Lab Questions1. The plastic bag is semipermeable to which

substance?2. Why did the iodine enter the bag?3. Why didn’t the starch enter the beaker?4. How is the plastic bag like the cell membrane?5. What is the definition of the word “diffusion”?

Cell Energy Make a list of the reasons why a cell might need

energy.

Photosynthesis & Cellular RespirationChapter 3, section 2Chapter 7, section 1Continuing with the

movement of particles into and out of cells

What is photosynthesis?

____________ is the process by which plants make their own food.

The word photosynthesis means – combine with _______ or _______ by light.

Photosynthesis

light made

Where does photosynthesis occur?Photosynthesis occurs in the

________ of a plant. More specifically- in the ___________. leaves

chloroplasts

Plant Cell

Chloroplast are

organelles in a plant

cell.

Inside of the chloroplast

_____________ is found in the chloroplasts.

Chlorophyll is the ___________ that makes the plant _________.

Chlorophyll __________ light energy.

green

pigment

Chlorophyll

absorbs

Photosynthesis needs and products:Plants use the ______ energy captured

by chlorophyll to change ______ ______ and _______ to food.

The food is in the form of a sugar called __________ (C6H12O6).

Photosynthesis also produces ________.

lightcarbon dioxide

water

glucose

oxygen

How does photosynthesis help us?

During the process of photosynthesis, oxygen is produced. We use this oxygen to breathe. We also receive energy from the plant when we eat plants.

Reactants vs. Products

Reactants are what you need to make something- The reactants for photosynthesis are Sunlight, Carbon Dioxide and Water.

Products are what you make- The products for photosynthesis are Glucose (sugar) and Oxygen.

EQUATIONEQUATION FORFOR PHOTOSYNTHESISPHOTOSYNTHESIS

Photosynthesis Video

Photosynthesis and Cellular RespirationCellular respiration is a chemical reaction

that occurs in cells. During cellular respiration, cells use oxygen

to produce energy from food.Food (glucose) is broken down into CO and

H O, and energy is released.The released energy is used to maintain body

temperature in animals. It is also used to form ATP, which supplies energy that fuels cell activities.

²²

EQUATION FOR EQUATION FOR RESPIRATIONRESPIRATION

The Connection Between Photosynthesis and Respiration

Reactants vs. Products

Reactants are what you need to make something- The reactants for cellular respiration are Glucose (sugar) and Oxygen.

Products are what you make- The products for cellular respiration are Carbon Dioxide, Water and ATP.

Alternative to Cellular RespirationFermentation produces ATP without using

oxygen. It can occur in muscles when they are unable to get oxygen for respiration.

Fermentation also produces lactic acid. This acid can cause muscle fatigue.

Scientist Notebook DrawingsDraw the Carbon Dioxide/Oxygen Cycle pg. 84:

Draw a plant to represent the plant cellDraw an animal to represent the animal cellDraw arrows with chemical formulasDraw the sun with arrowDraw ATP with arrow Include Photosynthesis and Respiration

explanations

Draw, color, and label figure 2 on pg. 185.