What is Biology

1.1

I. What is Biology???I. What is Biology???

A.A. BiologyBiology-- The study The study of living of living thingsthings

So What Constitutes a LIVING So What Constitutes a LIVING thing?thing?

Living Things Scavenger HuntLiving Things Scavenger Hunt1.1. Go outside, but stay within a Go outside, but stay within a

2 block radius of the school. 2 block radius of the school. 2.2. Find 2 living things and 2 Find 2 living things and 2

non-living things.non-living things.3.3. Respect other peoples’ Respect other peoples’

property and be careful on property and be careful on the streets!the streets!

4.4. Be back in 5 minutes!Be back in 5 minutes!

II. Living ThingsII. Living ThingsA. A. OrganismOrganism- - Any living thing. Any living thing. 1. Organisms vary in size but 1. Organisms vary in size but all have the same 5 traits:all have the same 5 traits:

1. 1. They are They are organizedorganized by cells by cells

2. They 2. They reproducereproduce3. They 3. They use energyuse energy4. They 4. They grow & developgrow & develop 5. They 5. They adjust/adaptadjust/adapt

II. Living ThingsII. Living Things

5. They 5. They adjustadjust//adaptadapt to the to the environment environment

a. a. StimulusStimulus--

b. b. ResponseResponse--

How did your living things How did your living things compare? How about your compare? How about your

non-living things?non-living things?

Tell your neighbor any mistakes Tell your neighbor any mistakes you made and what you you made and what you

know now!know now!

II. Living ThingsII. Living ThingsB. B. Maintain HomeoSTAsisMaintain HomeoSTAsis- The - The

internal conditions STAY the sameinternal conditions STAY the same

1. Temperature, water balance, etc1. Temperature, water balance, etc

2. Life is driven by homeostasis2. Life is driven by homeostasis

C. NeedsC. Needs

1. A place to live1. A place to live

2. Raw materials2. Raw materialsa) Water, food (minerals and a) Water, food (minerals and nutrients)nutrients)

How does science solve How does science solve problems?problems?

Does a Banana Sink or Float?Does a Banana Sink or Float?

Make sure you follow the Make sure you follow the instructions closely!instructions closely!

III. The Scientific MethodIII. The Scientific MethodA. A. Scientific MethodScientific Method- An organized - An organized procedure for collecting data and procedure for collecting data and solving problemssolving problems

Use the next slide to see if you Use the next slide to see if you can identify which steps you can identify which steps you used in the banana activity used in the banana activity (write on the back of your (write on the back of your

banana data sheet)banana data sheet)

III. The Scientific MethodIII. The Scientific Method

B. The ONLY Steps of the Scientific B. The ONLY Steps of the Scientific Method???Method???1. State the Question1. State the Question2. Gather Information2. Gather Information3. Form a Hypothesis3. Form a Hypothesis4. Perform an Experiment4. Perform an Experiment5. Analyze Data (Q & Q)5. Analyze Data (Q & Q)6. Draw Conclusions6. Draw Conclusions7. Repeat or Revise Hypothesis7. Repeat or Revise Hypothesis

III. The Scientific MethodIII. The Scientific Method

C. C. Independent VariableIndependent Variable- The - The part of the experiment that part of the experiment that you are you are CHANGING or CHANGING or TESTINGTESTING..

1. You should only test 1 1. You should only test 1 variable at a time!variable at a time!

III. The Scientific MethodIII. The Scientific Method

D. D. Dependent VariableDependent Variable- The effect - The effect of the change (independent of the change (independent variable)variable)2. What you MEASURE2. What you MEASURE2. Ex: Watering the plant with 2. Ex: Watering the plant with coffee (independent) caused the coffee (independent) caused the plant to die (dependent)plant to die (dependent)

III. The Scientific MethodIII. The Scientific Method

E. E. ControlControl- The part of the - The part of the experiment that your COMPARE experiment that your COMPARE the variable to.the variable to.

F. F. ConstantsConstants- Factors that remain - Factors that remain fixed (don’t change) during the fixed (don’t change) during the experimentexperiment

Which part of the banana activity Which part of the banana activity was the control? Independent was the control? Independent

variable? Dependent variable? variable? Dependent variable?

III. The Scientific MethodIII. The Scientific MethodF. F. TheoryTheory- An explanation based on - An explanation based on

MANYMANY observations and observations and experiments.experiments.

1. Supported by a lot of data1. Supported by a lot of data

2. We’re 2. We’re PRETTY SURE PRETTY SURE it’s true!it’s true!

G. G. LawLaw- Statement about how - Statement about how things in nature seem to work things in nature seem to work ALL THE TIME.ALL THE TIME.

1. We 1. We KNOWKNOW it’s true! it’s true!

IV. RecapIV. Recap►What is Biology?What is Biology?►Which part of the experiment Which part of the experiment

does not change?does not change?►What are the general steps of What are the general steps of

the scientific method?the scientific method?►What does it take for a What does it take for a

hypothesis to become a hypothesis to become a theory?theory?

►What is homeostasis?What is homeostasis?