HAPPY WEDNESDAY!!!

Bellwork: Draw the picture below and label the
essential parts we discussed yesterday.
UPDATE I.A.N.
THERE WILL BE A
CHECK ON FRIDAY
ALONG WITH A BUFF
BINDER CHECK
Front
Vocabulary
Word
Definition of the word.
A sentence that uses the
word.
Back
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
Biology
The study of life.
Back
Ecology is a type of
biology that studies
the environment.
Biology allows us to
understand the
living world around
us.
VOCABULARY
Cell
Prokaryote
Eukaryote
Endosymbiotic Theory
Cell Membrane
Function
Permeable
Impermeable
Selectively Permeable (Semi-Permeable)
Phospholipid Bilayer
Hydro
Phobic
Phillic
ESSENTIAL QUESTION:
WHAT IS THE PROCESS OF DIFFUSION?
WHAT IS THE PROCESS OF OSMOSIS?
Lab Report
Purpose:
To investigate the movement of water into and out of a semipermeable 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 semipermeable 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
____________.
DATA TABLE (COPY THIS)
FILL IN YOUR TABLE WITH YOUR MEASUREMENTS.
Bear in
solution
Day 1
Length
(cm)
1 cm
Day 2 Green
Yellow
Change Green
Yellow
Width
(cm)
1 cm
Height
(cm)
2 cm
Volume
(cm3)
2 cm3
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!
HOMEWORK 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!
CONCLUSION (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.
ISOTONIC MEANS “SAME STRENGTH”.
HYPERTONIC MEANS “ABOVE STRENGTH”.
HYPOTONIC MEANS “BELOW STRENGTH”.
Draw This
Label: Hypotonic
Water: High (outside
cell)
Solute: Low
Label: Hypertonic
Water: Low (outside
cell)
Solute: High
Label: Isotonic
Water: Same
Solute: Same
QUICK RECAP!
Why do molecules move?
How do molecules move?
1.
Concentration gradient

What is it?

How does it affect how molecules move?
Types of solutions:
2.
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.