Biology 12-4-12 SYLLABUS and LAB SAFETY SHEET DUE by FRIDAY (Turn it into the bin if you have it now) Open your packet to page 5 (The Language of Science)

(write your answers in the WARM-UP/NOTES section of your packet) Use the word parts and their meanings on page 5 to determine the meaning of the following words: (write your answers in the WARM-UP/NOTES section of your packet) 1. biology 2. ectotherm 3. photosynthesis 4. arthritis

1. biology 2. Ectotherm 3. photosynthesis 4. arthritis 1 MIN. Remaining

How did you do? 1. Bio = life logy = study of BIOLOGY = the study of life 2. Ecto = outer, external therm = heat Ectotherm = heat that comes from outside 3. Photo = light synthesis = to make Photosynthesis = to make something with light 4. Arthro = joint itis= disease,inflammation Arthritis = disease or inflammation of the joints

What is the Scientific Method? (page 9) It is a way of trying to seek out an answer to a question!

What is a hypothesis? A hypothesis is a PREDICTION that indicates what is believed to occur in an experiment based on available evidence. A hypothesis should NEVER begin with “I think or I believe” A hypothesis should be formatted the following way: “If RELATIONSHIP then PREDICTION”

TYPES OF OBSERVATIONS QUANTITATIVE observations are made by using a measuring device Examples: 125 mL of milk, 2-3 drops of food coloring QUALITATIVE observations are made by using your senses Examples: the food coloring spread in all directions, milk is white, milk has a smell

Necessary Components of an Experiment All experiments have factors that are controlled and factors that are changed. A CONTROL is a situation that remains the closest to NORMAL CONDITIONS Factors that are changed are called VARIABLES

There are two necessary variables: INDEPENDENT VARIABLE is the factor controlled by the experimenter. This might also be described as the change made by the experimenter on purpose. The DEPENDENT VARIABLE is the change that occurs because of what the experimenter does.

EXAMPLES A chemical reaction will occur faster if the temperature is increased. The amount of water added to a solution will decrease the concentration of the solution. The more sleep an individual gets, the more alert an individual will be.

ENDING an EXPERIMENT All experiments should end with a CONCLUSION or SUMMARY A conclusion is based on your UNDERSTANDING and DATA collected. Make a decision to SUPPORT or REJECT your hypothesis. Science isn’t about being right be rather about seeking out possible truths. It is ok to be WRONG!

LET’S TRY SOME PRACTICE PAGE 11 SCIENTIFIC HYPOTHESIS, CONTROLS, and VARIABLES. 1. PROBLEM: Do I have faster reflexes when it is cold outside or warm outside? Independent variable: Temperature outside Dependent variable: Reflex speed Hypothesis: If body movements are affected by temperature then reflexes will slow down when it is cold outside. Control: Reflex speed in room temperature.

Problem: Will water boil at a higher or lower temperature when salt is added? Independent variable: Addition of salt Dependent variable: Temperature when water boils Hypothesis: If salt interfers with the ability to boil then water will boil at a higher temperature when salt is added. Control: Temperature water boils at when NO salt is added.

WHAT NEXT? TRY #3 on your own. Get it checked/stamped by Mrs.Collins Complete Station #2 Activity on page 8 – MAKE SURE TO CLEAN-UP! HOMEWORK: PAGE 12, complete from tomorrow!