Transcript Monday July 19, 2012

Learning goal: Make accurate and precise measurements
using proper significant figures when collecting and
organizing data.
Page 26
Monday August 04, 2014
Warm-up: Update your table of contents while returning papers.
4
Evaluate
based on
A&P
3
Distinguish
A&P in
data
2
Importance
of A&P
1
Define
A&P
Learning goal: Make accurate and precise measurements
using proper significant figures when collecting and
organizing data.
Page 26
Monday August 04, 2014
Learning goal: Make accurate and precise measurements using proper
significant figures when collecting and organizing data.
4
Evaluate
based on
A&P
Learning scale:
1
2
3
4
Supporting or
Explain the
Differentiate
importance of
between accuracy rejecting a hypothesis
accuracy and
and precision when based on the accuracy
precision of data
precision
in scienceat home
measuring
andend ofand
Student’s self-evaluation:
Complete
or at the
class,
use the
in an investigation
calculating
4-3-2-1-0 system of understanding
Define accuracy
and precision
Student’s self-evaluation: Complete at home or at the end of class, use the
4-3-2-1 Learning scale (two to three sentences).
Homework: None
3
Distinguish
A&P in
data
2
Importance
of A&P
1
Define
A&P
Learning goal: Make accurate and precise measurements
using proper significant figures when collecting and
organizing data.
Page 27
Monday August 04, 2014
Sig fig math:
1. What time does each stop watch below show?
Fig 1: stopwatch A
Fig 2: stopwatch B
4
Evaluate
based on
A&P
3
HH:MM:SS
HH:MM:SS:TH
00:28:00
00:28:00:00
Distinguish
A&P in
data
2
Importance
of A&P
1
2. Are these times the same, or are they different?
Define
A&P
Learning goal: Make accurate and precise measurements
using proper significant figures when collecting and
organizing data.
Page 27
Monday August 04, 2014
Sig fig math:
4
2. Are these times the same, or are they different?
The times are different because they have different number of sig figs. The
time on stopwatch B is more accurate and precise.
3. How many sig figs does each of the following numbers contain?
a. 28.00
Rules to identify sig figs:
b. 300
1) ALL non-zero numbers (1,2,3,4,5,6,7,8,9) are ALWAYS significant.
c. 0.008
2) ALL zeroes between non-zero numbers are ALWAYS significant.
d. 4902
3) ALL zeroes which are SIMULTANEOUSLY to the right of the
decimal point AND at the end of the number are ALWAYS significant.
4) ALL zeroes which are to the left of a written decimal point and are
in a number >= 10 are ALWAYS significant.
DO NOT WRITE THESE DOWN!!
Evaluate
based on
A&P
3
Distinguish
A&P in
data
2
Importance
of A&P
1
Define
A&P
Learning goal: Make accurate and precise measurements
using proper significant figures when collecting and
organizing data.
Page 27
Monday August 04, 2014
Sig fig math:
3. How many sig figs does each of the following numbers contain?
a. 28.00 4 sig figs
Atlantic Pacific Rule:
b. 300
1 sig fig
c. 0.008 1 sig fig
d. 4902 4 sig figs
Pacific
If a decimal point is
Present, count all
digits, starting with the
first non-zero from left
to right.
4
Evaluate
based on
A&P
3
Atlantic
Distinguish
A&P in
data
If a decimal
2
point is
Absent, count Importance
of A&P
all digits,
starting with
1
the first nonDefine
zero from
A&P
right to left.
Learning goal: Make accurate and precise measurements
using proper significant figures when collecting and
organizing data.
Page 27
Monday August 04, 2014
Sig fig math:
4. Multiplying and dividing with sig figs
Example: 5 x 5 = 25
30 with sig fig rules
Example: 5.0 x 5.0 = 25 with sig fig rules
Example: 100.00 / 4.00 = 25.0 with sig fig rules
Example: 100.00 / 4.0 = 25 with sig fig rules
When finding the rule, look at the number of sig figs in the question and in the
answer.
The answer must contain the same amount of sig figs as the number in the
question with the LEAST amount of sig figs.
4
Evaluate
based on
A&P
3
Distinguish
A&P in
data
2
Importance
of A&P
1
Define
A&P
Learning goal: Make accurate and precise measurements
using proper significant figures when collecting and
organizing data.
Page 27
Monday August 04, 2014
Sig fig practice: copy and identify the proper number of sig figs
4
Evaluate
based on
A&P
3
Distinguish
A&P in
data
2
Importance
of A&P
1
Define
A&P
Learning goal: Make accurate and precise measurements
using proper significant figures when collecting and
organizing data.
Page 27
Monday August 04, 2014
Answer the questions in complete sentences
11. Why are significant figures important when taking data in the laboratory?
12. Why are significant figures NOT important when solving problems in your math
class?
13. Using two different instruments, I measured the length of my foot to be 27
centimeters and 27.00 centimeters. Explain the difference between these two
measurements.
14. Explain in words, the Atlantic-Pacific Rule for finding significant figures in a
number.
4
Evaluate
based on
A&P
3
Distinguish
A&P in
data
2
Importance
of A&P
1
Define
A&P