1. Why Do Dogs Pant?

2. What do Humans do when we get hot?
Why do we sweat?

3. So what’s the difference?
Dogs Humans

4. What adaptations do humans have to help maintain balance in their bodies?
You can write students responses using the smart board pens or on the dry erase board

5. Tougher than the Sun
As you read the article, think about the following questions.
What external factors did Josh's body have to balance? 
What was Josh doing to cause this stress? 
What symptoms did Maggie show that indicates her body is under stress?

6. What types of signals do our bodies give us that indicate our body is under stress?
How does our body recover from this stress?

7. Think-Pair-Share Think Pair Share
Come up with a list of 4 terms or concepts that relate to how organisms maintain balance.
Pair
Discuss your terms with your partner
Share
Be prepared to share your terms with the class

8. Egg-sellent Experiment
Let’s pretend this egg is a single cell in our body
The shell has been removed to expose the semi-permeable membrane beneath
This means some stuff can get through while other stuff cannot

9. Now we are going to put these shell-less eggs in a few different solutions.
Distilled water
No liquid
Corn syrup

10. Massfinal - Massinitial Change in Mass÷Initial mass x 100
Collecting Data
Type of Liquid
Initial Mass (g)
Initial Observations
Final Mass (g)
Final Observations
Change in Mass
Massfinal - Massinitial
% Change in Mass
Change in Mass÷Initial mass x 100
Egg in Distilled Water
Egg in Corn Syrup
Egg in Empty beaker

11. Qualitative vs. Quantitative
Which data is considered quaNtitative?
Which data is considered quaLitative?

12. Variables
Independent
Dependent
Control

13. Groups
Experimental
Control

14. Hypotheses
What will happen to the egg when placed in the different solutions? If I place a shell-less egg in distilled water then its mass will _____________. If I place a shell-less egg in corn syrup then its mass will _____________. If I place a shell-less egg in an empty beaker then its mass will _____________.

15. Draw a Diagram of your Prediction
Distilled water
After 1 Day
Empty Beaker
After 1 Day
Corn Syrup
After 1 Day

16. Before you get your egg…
You must be CAREFUL
The eggs are very FRAGILE and can break
Only use slotted spoon to move egg
We do not have extra eggs if one breaks

17. Safety Or else…. Raw eggs carry SALMONELLA
If ingested, it will cause you to becomes very sick
Diarrhea
Vomit
Stomach pain
You must wash hands after lab
Or else….

18. Data Analysis Describe what happened to your egg.
Why do you think that happened?
If our cells are similar to the egg, what would happen if we only drank very sugary drinks (like the corn syrup)? Why?

19. Tonicity

20. Vocabulary Solute: particles in a solution like salt or sugar
Solvent: usually a liquid which dissolves solutes like water
Solution: A mixture of solutes and solvent
Concentration: How much solute is in a solution

21. Hypertonic Outside Higher concentration of solute _________ the cell.
The cell is __________
The solution is __________
Water moves _____ of the cell.
The cell __________.
Outside
= solute
Hypotonic
Hypertonic
out
shrinks

22. Hypotonic Inside Higher concentration of solute _________ the cell.
The cell is __________
The solution is __________
Water moves _____ of the cell.
The cell __________.
Inside
= solute
Hypertonic
Hypotonic in
grows

23. Isotonic ________ concentration of solute inside and outside.
The cell and solution are ____________
Water moves ____ and ____ of the cell at the same rate.
The cell stays the ________.
Same
Isotonic In
out
Same

24. C.E.R. Claim Evidence Reasoning
If you place a shell less egg in ___________, it will _____________ in mass.
Evidence
The mass of my egg ______________ by _________ grams
Reasoning
________________ is a _________________ solution. Water will flow ________________ the egg making it________________