SCIENCE - (Greek) to know

� Purpose of science:– To investigate– Understand natural

world– Use explanations to

make useful predictions

Biology - Study of Life

� Pure biology - explore just to have

knowledge

� Applied biology- taking what you know

and applying it to make life better Ex: felt tip pens designed for

antigravity writing in space- plants - use capillary

action in plumbing to help water to flow up

Scientific inquiry

� Begins with observations - gathering info about events in an orderly way

� Information gathered is called data

Two categories of Data

� 1.Qualitative Data

gathering data by observing, describing, characteristic that can’t be counted

Ex: identical twin personality traits,

behaviors, genetics

2. Quantitative Data

� Data taken by counting or measuring

Types of Variable

� Independent Variable:– A factor that is

changed in an experiment

– Only use one independent variable when experimenting

– Graphing=goes on x-axis

� Dependent Variable– Variable that is

measured– Graphing= goes on

y-axis

ACTIVITY: SCIENTIFIC PROCESS

� Collecting Observations - – Record the # of heart beats in one minute– State a Problem - How will exercise effect

this #?

Form a Hypothesis Use If…then…. statements

Make a Prediction

- Determine the # of beats you think you will count in the same length of time after you jog in place for one minute

� Verify Prediction– After jogging in place, record the # of beats

taken for one minute

Drawing a Conclusion - Is there a connection between exercise and the

rate of heart beats?

GROUP ACTIVITY (answer with a partner)

1. What was the control part of the experiment?

2. Was the data you recorded qualitative or quantitative?

3. What is the independent variable?

4. What is the dependent variable?

Enough for Now

Characteristics of Life Quiz

� List eight characteristics that classify a

mushroom as a living thing� Explain the difference between sexual

and asexual reproduction� Explain one way a human responds to the

environment to maintain homeostasis

Characteristics of Life Quiz

� List eight characteristics that classify a

mushroom as a living thing.

2. What is the difference between growth and development?

3. Give an example of human homeostasis.