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• 1. Warm-Up, 08.26.2009 (15 mins)
Why is the scientific method important? Can you think of anything the scientific method can’t do?
Why is it important that scientists (and people in everyday life) be as accurate as possible?
What do you think life was like before systems of measurement were invented?
• 2. Announcements
By now you should have turned in:
Lab Safety Sheet (signed)
Class Rules/Syllabus (signed)
By the end of today you should have:
3 warm-ups & 3 wrap-ups
• 3. Today’s Objectives
Students will be able to:
Understand how to measure and estimate lengths
Become more aware of linear measurements in the world and communicate better about the significance of these measurements.
Understand the importance of measurement in science.
Understand the relative sizes of things using scientific notation.
• 4. Measurement
Baby turtle!!!!!!!!!!!!!omg!!!!!!!!!!
• 5. Bill Nye - Measurement
• 6. Bill Nye the Science Guy - Measurement
• 7. Metric Conversions Ladder Method
T. Trimpe 2008 http://sciencespot.net/
• 8. 1
2
3
MetersLitersGrams
How do you use the “ladder” method?
1st – Determine your starting point.
2nd – Count the “jumps” to your ending point.
3rd – Move the decimal the same number of jumps in the same direction.
Starting Point
Ending Point
__.
__.
__.
2
3
1
KILO1000Units
HECTO100Units
DEKA10Units
DECI0.1Unit
CENTI0.01Unit
MILLI0.001Unit
4 km = _________ m
How many jumps does it take?
4.
= 4000 m
• 9.
• 10. Scientific Notation
A short-hand way of writing
large numbers without
writing all of the zeros.
• 11. The Distance From the Sun to the Earth
93,000,000
• 12. Step 1
Move decimal left
Leave only one number in front of decimal
93,000,000 = 9.3000000
• 13. Step 2
Write number without zeros
93,000,000 = 9.3
• 14. 7
93,000,000 = 9.3 x 10
Step 3
Count how many places you moved decimal
Make that your power of ten
• 15. The power of
ten is 7 because
the decimal
moved 7 places.
7
93,000,000 = 9.3 x 10
• 16. 93,000,000 --- Standard Form
9.3 x 107 --- Scientific Notation
• 17. Powers of Ten - Video
I need a two volunteers for after the video
One will write out the size of the smallest thing we know about.
One will write out the size of the largest thing we know about.
• 18.
• 19. The largest “thing” currently known
• 20. The smallest measurable “thing” currently known
• 21. Discovering even smaller particles….
• 22. Wrap-Up
If you had one wish, what would it be and why? You can’t wish for more wishes, by the way.
What did we learn today?
What is due next class?
• 23. Metric System Scavenger Hunt