Ch. 1: Science in our World!
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Transcript of Ch. 1: Science in our World!
QuestionEverything!
Science-the knowledge obtained by observing natural events and conditions in order to discover facts and formulate laws or principles that can be verified or tested
Investigation Research Observation Experimentation
Benefits of science! Recycling (Saving resources) Fighting diseases Answering questions
ZoologistGeochemistMechanicOceanographerVolcanologistAny job ever!
Scientific Method-a series of steps followed to solve problems Ask a question Make observations Form a hypothesis ▪ Hypothesis-an explanation that is based on prior
scientific research or observations and that can be tested
Test the Hypothesis Analyze the results Draw Conclusions Communicate results
Controlled experiments! an experiment that tests only one factor at a time by
using a comparison of a control group with an experimental group
Variable a factor that changes in an experiment in order to test a
hypothesis Change only ONE at a time!
Analyzing results of experiments help scientists focus on the effect of the varriable
Types of Models Physical Mathematical conceptual▪ Ideas, comparisons, behavior
Model- a pattern, plan, representation, or description designed to show the structure or workings of an object, system, or concept
Knowledge can change when a scientist makes a new Hypothesis
Models can represent things that do not exist, is to small to see, or to see a large item scaled down
Models can help us understand things Theory-an explanation that ties together many
hypotheses and observations Law-A summary of many experimental results
and observations: a law tells us how things work New evidence can always challenge accepted ideas
and scientists can re-evaluate old ideas
Models are useful but not perfectA model is not the object it is
representing!A model only tells part of the storyThis model shows us what a dinosaur
might look like, but that’s it!
Engineering Design Process -the process engineers use to develop a new technology Step 1- Identify a need Step 2- Develop possible solutions Step 3- Make a prototype
▪ Prototype- a test model of a product Step 4- Testing and Evaluation▪ Cost benefit analysis- the process of determining
whether the cost of doing something is worth the benefit provided
Step 5 - Improve! Repeat forever!
Intended Benefits vs. Unintended consequences
Bioengineering Engineering on living organisms
Assistive Bioengineering Helps, not permanent
Adaptive Bioengineering Permanently changes individual
SI Units- Easy to use, most widely used, and makes information sharing easy