EOU Exam on Thursday, May 1st

Lesson 7

Diffusion Through a Membrane

Learning Intention

Students will be able to carry out an experiment that demonstrates the affect of salt/distilled water in real-time and apply their knowledge to real-life scenarios.

Success Criteria

Engage by trying to determine how pickles are made.
Explore by using a microscope to view red onion cells in different solutions.
Explain the scientific concepts behind what was viewed.
Elaborate on Osmosis by applying concepts to new situations.

Reminders:

Tutoring on Thursday pd 9 with Ms. Angarola.
Tutoring on Thursday pd 10 with Mr. Pinho.
Quiz tomorrow on vocabulary and chart.

Agenda

Activity 1: Something looks Sus'

Activity 2: Turn and Talk

Activity 3: Discovery

Activity 4: Explain

Activity 5: Elaborate

NGSS Standard

Each cell is covered by a membrane that performs a number of important functions for the cell. These include: separation from its outside environment, controlling which molecules enter and leave the cell, and recognition of chemical signals. The processes of diffusion and active transport are important in the movement of materials in and out of cells. (1.2g)

Activity 1

Something Looks Sus'

sc1 (10 min)

Directions: In your medical journals, write down:

1) Which one is incorrect

2) Why is it incorrect?

3) What is the correct answer

Question #3

Question #1

Question #2

Question #3

Student Response #1

Salt is toxic to plants so when the salt water got on the plants they died.

Student Response #2

Group B had been placed in distilled water because so much water diffused into the blood cell that it swelled and popped.

Student Response #3

The cell was placed in a salt water solution

Activity 2

Turn and Talk #1

sc 2 - (5 min)

Directions:

Turn to your group and discuss the question below:

"What makes pickles taste sooo good? Are pickles a fruit or vegtable?"

Activity 3

Discovering through Microscopes (water to salt water)

sc3- (10 min)

Directions:

Step #1: Watch Mr. Pinho and Ms. Angarola model how to peel the skin off the red onion and make a wet mount slide.

Step #2: View the red onion cells underneath the microscope.

Step #3: Draw a diagram in question #6

Step #4: Switch out the water for salt water following your teacher example

Step #5: Answer questions 7-11

Activity 4

Discovery through Microscopes

(salt water to distilled water)

sc4 - (10 min)

Directions:

Step #1: Watch Mr. Pinho and Ms. Angarola model how to switch out the salt water for distilled water.

Step #2: View the red onion cells in distilled water underneath the microscope.

Step #3: Answer questions 12-15

Activity 6

Pictures

sc5 - (5 min)

Activity 5

Exit Ticket

sc5 - (5 min)

Directions: In your medical journals, write a paragraph describing how cucumbers are turned into pickles. Discuss what is occurring to the cucumbers cells and how/why they change.

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