1. Do Now What is the proper way to write a hypothesis?
Why must their be a control and experimental group in an experiment?
How is the experimental group different from the control group?
What is the definition of an Independent Variable?
What is the definition of a Dependent Variable?
If ____________, then ______________.
To compare results
It contains one change (The Independent Variable)
What “I” change
The data collected during an experiment

2. Reviewing the Penny Lab
Control Group
How was the experimental group different from the control group?
Experimental Group

3. Reviewing the Penny Lab
What materials were placed in the control group?
What materials were placed in the experimental group?
What was the independent variable in the experiment?
What was the dependent variable in this experiment?
State one way to perform this lab safely.
Penny Dropper Water
Penny Dropper Water Soap
Soap
Amount of Drops
Goggles

4. Practice Regents Question
A certain plant has white flower petals and it usually grows in soil that is watered with tap water. Sometimes the plant produces flowers with red petals. A company that sells the plant wants to know if the acidity of the fluid used to water the plants affects the color of the petals in this plant.
Your Job: Design an experiment to determine if acidity affects petal color.
Hint: Acidic Liquids include lemon juice, orange juice, and coffee.

5. Practice Regents Question
Experimental Group
Control Group
How could the experimental group be different from the control group?
Based on the reading what color should the petals be in experimental group? Why?

6. Practice Regents Question
State Hypothesis
List the materials in the control group
List the materials in the experimental group
How is the experimental group different from the control group?
What is the Independent Variable in this experiment?
What is the Dependent Variable in this experiment?
State one set of data that you collect that would support your hypothesis.
If I water the plants with _______, then the petals will be _______.
Sun Plant Water Soil
Sun Plant Water Soil Acid
Acid
Acid
Color of Petals
The plants watered with acid had red petals

7. Use the glossary to look up Key Words
Have your homework ready to be checked.

8. Homeostasis: Maintenance of a stable internal environment despite changes in the external environment.
Feedback Mechanism: Cycle of events that lead to the maintenance of homeostasis

9. What happens when you are hot?
Body Temperature Rises
Brain Signals Body to Sweat
Body Stops Sweating
Body Temperature Lowers

10. What happens when you are cold?
Body Temperature Lowers
Brain Signals Body to Shiver
Body Stops Shivering
Body Temperature Rises

11. What happens to you blood sugar after you eat?
After You Eat Blood Sugar Rises
Pancreas Secretes Insulin
Insulin Secretion Stops
Blood Sugar Lowers

12. Biology is the study of life and life is not perfect!
Equilibrium: Perfect Balance
Biology is the study of life and life is not perfect!
Dynamic Equilibrium: Fluctuation around balance.

13. What is living? If it is made up of one or more cells
If it contains DNA (Instruction manual for life)
If it carries out all 8 life process (Metabolism)

14. Nutrition: Obtaining needed substances
Autotrophic Nutrition- (Photosynthesis) Organisms “automatically” have food
Heterotrophic Nutrition- (Eating/Hunting/Gathering) Organisms need to obtain their food from the external environment

15. 2. Transport: Movement of needed substance around the body or cell

16. 3. Respiration: Using oxygen and nutrients to make energy
Why do we breath????
Oxygen makes ATP
ATP = ENERGY!

17. 4. Excretion: Removal of toxic waste

18. 5. Regulation: Communication used in the maintenance of homeostasis

19. 6. Growth: Increase in size and cell number

20. 7. Synthesis: To make new

21. NOT NEEDED FOR THE SURVIVAL OF THE INDIVIDUAL!!!
8. Reproduction: Increases population size
NOT NEEDED FOR THE SURVIVAL OF THE INDIVIDUAL!!!

22. Metabolism: Sum of all 8 life processes
Unicellular organisms use organelles to maintain homeostasis.
Organelles are in the Cell!
Multicellular organisms use organelles and organs to maintain homeostasis

23. Organism
Organ System
Organs
Tissues
Cells
Organelles

24. Remember: What is living?
If it is made up of one or more cells
If it contains DNA (Instruction manual for life)
If it carries out all 8 life process (Metabolism)
Biology is the study of living organisms and how they interact with their environment.
Abiotic: Non Living Factors
Biotic: Living Factors

25. List 3 Abiotic and 3 Biotic Factors

26. List 3 Abiotic and 3 Biotic Factors

27. List 3 Abiotic and 3 Biotic Factors