BELL WORK: Copy and complete the concept map below: Molecule Transport HIGH to LOW LOW to HIGH Diffusion Facilitated Diffusion Osmosis Active Transport needs energy! small molecules water no energy! large molecules uses transport proteins

Science Fact of the Day: The human heart has enough pressure to squirt blood up to 30 feet away.

Egg Demo Page 22 Essential Question: How do molecules move across the cell membrane? Question Column Egg in Vinegar Egg in SyrupEgg in Water L1 – L2 – L3 – Hypothesis: Observation: Diagram: Hypothesis: Observation: Diagram: Hypothesis: Observation: Diagram: Summary - Set this up on page 22 in your journal. We’ll be coming back to it this week.

Title Page 21: Osmosis **We’re finishing notes. Only day this week!! **

Watch the video for an intro on what we’re learning about today. Cell Video

Diffusion of water through a selectively permeable membrane is called osmosis. Remember: SALT SUCKS I know that other molecules move too, that’s why we gave the movement of water a special name. This way everyone knows which molecule you’re talking about.

Divide the rest of your page into 3 sections. We’ll fill out each one as we go. IsotonicHypertonicHypotonic

ISOTONIC means “same strength” Under the picture, write this: equal concentration inside & outside NO VISIBLE CHANGE water moves evenly in & out At the very bottom, write and highlight this: ISO = same DRAW THIS!

HYPERTONIC means “above strength” Under the picture, write this: solute concentration HIGHER outside the cell water moves out of the cell CELL WILL SHRINK At the very bottom, write and highlight this: HYPER = HIGH, makes the cell DRY! DRAW THIS!

HYPOTONIC means “below strength” Under the picture, write this: solute concentration LOWER outside the cell water moves into the cell CELL WILL SWELL At the very bottom, write and highlight this: HYPO = LOW, makes the cell GROW! DRAW THIS!

If the inside of a cell is 95% water, what is the concentration of water in an isotonic, hypertonic, or hypotonic solution? What is the concentration of solute in each of those cases?

Exit Ticket: On the handout I gave you draw an example of each type of transport with arrows to show how the molecules move. Key: Blue = water Pink = Salt (small molecule) Green = Glucose (large molecule) Yellow Star = ATP Red arrow = direction molecule will move Label the High and Low concentration in red High Low