H APPY W EDNESDAY !!! Bellwork: Draw the picture below and label the essential parts we discussed yesterday.

UPDATE I.A.N. T HERE WILL BE A CHECK ON F RIDAY ALONG WITH A B UFF B INDER C HECK

Front Back Vocabulary Word Definition of the word. A sentence that uses the word. A real-world example of the word. A drawing that reminds you of the definition of the word. (Must use at least one color.)

Front Back Biology The study of life. Biology allows us to understand the living world around us. Ecology is a type of biology that studies the environment.

VOCABULARY Cell Prokaryote Eukaryote Endosymbiotic Theory Cell Membrane Function Permeable Impermeable Selectively Permeable (Semi-Permeable) Phospholipid Bilayer Hydro Phobic Phillic

E SSENTIAL Q UESTION : W HAT IS THE PROCESS OF DIFFUSION ? W HAT IS THE PROCESS OF OSMOSIS ?

Lab Report Purpose: To investigate the movement of water into and out of a semi- permeable membrane Question : What type of solution is my gummy bear in? Hypothesis: If the Gummy Bear is placed into an isotonic solution, then it will ____________. If the Gummy Bear is placed into a hypertonic solution, then it will ____________. If the Gummy Bear is placed into a hypotonic solution, then it will ____________.

Lab Report Purpose: To investigate the movement of water into and out of a semi- permeable membrane Question : What type of solution is my gummy bear in? Hypothesis: If the Gummy Bear is placed into an isotonic solution, then it will ____________. If the Gummy Bear is placed into a hypertonic solution, then it will ____________. If the Gummy Bear is placed into a hypotonic solution, then it will ____________.

D ATA TABLE (COPY THIS) F ILL IN YOUR TABLE WITH YOUR MEASUREMENTS. Bear in solution Length (cm) Width (cm) Height (cm) Volume (cm 3 ) Day 11 cm 2 cm2 cm 3 Day 2 Green Yellow Change Green Yellow

Procedure (DO NOT WRITE THIS) 1.On the next lab day, gently remove the bears from the solution. 2.Gently blot the bears dry by placing them on a paper towel. 3.Measure the bear. Height : Foot to Head Width : Back to Tummy Length : Shoulder to Shoulder 4.Find the mass of the bear. Do this by placing the bear on the balance. Record the total mass. Carefully slide the bear back into the empty cup.

Conclusion : (the paper on your table) Number 1- ___ and complete the closed passage. DON’T copy the whole thing Analysis What type of solution was your bear in? (Justify your answer) Explain how a cell maintains homeostasis using osmosis. TURN IN YOUR REPORT WHEN YOU ARE DONE!

H OMEWORK TONIGHT! On my YouTube channel and my website. Search “ Facilitated Alyssa Dolny ” Complete Cornell Notes as you watch. Tomorrow’s activity will be difficult to do without your notes!

C ONCLUSION ( ON YOUR TABLE ) Each blank is numbered, fill in the word for the number DON’T copy the whole thing Analysis What type of solution was your bear in? (Justify your answer) Explain how a cell maintains homeostasis using osmosis.

I SOTONIC MEANS “ SAME STRENGTH ”. H YPERTONIC MEANS “ ABOVE STRENGTH ”. H YPOTONIC MEANS “ BELOW STRENGTH ”. Draw This Label: Isotonic Water: Same Solute: Same Label: Hypertonic Water: Low (outside cell) Solute: High Label: Hypotonic Water: High (outside cell) Solute: Low

Q UICK R ECAP ! Why do molecules move? How do molecules move? 1. Concentration gradient What is it? How does it affect how molecules move? 2. Types of solutions: Isotonic Hypertonic Hypotonic

Diffusion: when particles move from an area of high concentration to an area of low concentration.

Osmosis : diffusion of WATER through a selectively permeable membrane Remember: SALT SUCKS

When the concentration of a solute is the same throughout a system, the system has reached equilibrium. When equilibrium is reached, particles do continue to move across the membrane.