7th grade august 20th, 2010
TRANSCRIPT
FRIDAY, AUGUST 20TH
Warm-up:
What are the steps of the scientific method?
Homework: Project brainstorm
Answers to warm-up
Question Observe/ research Hypothesis Experiment Results Conclusion Communicate the Results
Questions?!?
Get a red textbook
What is Technology?
The products and processes that help us get our needs.
The tools and methods for creating products and processes
Any product, process, or knowledge that is created when a need is met(computer, coffee maker, hearing aide)
Interactive notebook pg. 5 Write the following questions
What are three types of models used by scientists?
What are some ways scientists use models?How do models differ from the object it
represents?What is the difference between a theory and
a law?Can theories change?
Scientific Models
What is a model?A model is something that scientists use to
represent an object or processEx: Cells, Human body, buildings
There are Three Types of models
Physical Models
Mathematical Models
Conceptual Models
Physical Model
This type of model you can touch and see. For example a model of the solar system.
Mathematical Model
A mathematical model is made up of mathematical equations and data.
Weathermen use this type of modeling with computers to make weather predictions
Conceptual model
A conceptual model is used to help explain ideas. Ex. Animal BehaviorScientists use conceptual models to predict
how an animal will behave.
What are some differences between models and the real objects?
Size – solar system made smallercells are made larger
Strength – dinosaur models will never tell how strong they were.
How are models helpful?
Models can be used to help explain theories.
A theory explains why something happens and what will happen in the future. It is based on observation and testing.
Theories can be proven wrong new theories can be made.
Scientific Laws
When a theory and a model correctly predict the results of many different experiments the theory is considered a law.
i.e THE LAW OF GRAVITY
If I throw something in the air, it will come back down every time.
I.N. Intro to Engineering
Ask
What is the problem? What have others done? What are the constraints?
Imagine
What are some solutions? Brainstorm ideas. Choose the best one.
Plan
Draw a diagram. Make lists of materials you will need.
Make a prototype – or model -
Create
Follow your plan and create it. Test it out!
Improve
Talk about what works, what doesn't,
and what could work better. Modify your design to make it better. Test it out!
http://pbskids.org/designsquad/season3/index.html
Design a rollercoaster
http://www.learner.org/interactives/parkphysics/coaster/
Negative effects of Technology
Pollution from large factories CFC’s, were introduced to clean the
environment, but actually made it worse
Can you think of others?
What is Bioengineering?
Engineering things to help plants, animals, and people.
2 types of bioengineering
Interactive notebook pg. 4 bottom
Assistive
These technologies are developed to help organisms without changing them
Ex: contact lenses, hearing aides, crutches, canes.
Adaptive
Adaptive technologies change the living organism
Ex. Artificial skin, which heals wounds faster
Ex. Changing DNA.
Video
http://spectrum.ieee.org/video/biomedical/bionics/dean-kamens-artificial-arm
Project
Working with a group of 2 or 3Create an assistive or adaptive
bioengineered product.You need to answer the following questions
and attach them to your poster board.○ What the product is called?○ What is does?○ Who/What will use it?○ How will you test it?