Chapter 1: The Science of Biology. Key Concept: What is the goal of science?. 1-1: What Is Science?. 1-1. The goal of science is to: investigate and understand the natural world. explain events in the natural world. use those explanations to make useful predictions. 1-1.
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What is the goal of science?
These steps are called the Scientific Method.
Curiosity (2) answer questions, and (3) draw conclusions.HYPOTHESIS
A possible explanation for an event or set of observations.
- It is a prediction about the outcome of an experiment.
An "educated guess" (2) answer questions, and (3) draw conclusions.
A hypothesis may be ruled out or confirmed. (2) answer questions, and (3) draw conclusions.
(hyenas are more closely related to cats)
Redi’s Experiment (2) answer questions, and (3) draw conclusions.
Hypothesis must be clearly stated at beginning of experiment.
And, the experiment must be repeatable.
Consider observations thoughtfully before drawing conclusions.
(Boiling water may not be 100 degrees C!)
If not, hypothesis can be changed.
Most scientific experiments are designed to consider only 1 variable.
With sugar between
(1 variable only!)
Theories are not facts, but probable explanations.
Theories are changeable and expandable, and most importantly, theories are FALSIFIABLE.
(If all exp’ts support hypothesis)
Pill bug, sow bug, roly polies
Phylum Crustacea – related to crabs, shrimp
Want to observe behavior and see what environment they prefer.
Hypothesis: If pill bugs prefer moist environments, then they will move to the side of a choice chamber which has more moisture.
Objective: to determine ______________.
1. Gather choice chamber (CC) and other materials to run expt.
2. cut out paper disk to fit in each side of CC.
3. Count out 10 roly polies.
4. Place 5 roly polies in each side of CC.
5. . . .
No bugs will be harmed in this expt!
Data from this lab showed that roly polies preferred the ____________ environment over the ___________ environment. I accept/reject my hypothesis that __________________________.
SI Units (memorize these)
Basic unit of length = meter (m)
Basic unit of mass = gram (g)
Basic unit of volume = liter (L)
Unit of time = second (s)
Unit of temperature =
Celsius degree (C) or Kelvin (K)
Memorize these! between