Significant Figures
How many significant figures are there in 80702 ?
What is 5.
s = d/t d = s x t t = d/s
An Uber driver takes 45 min. to drive 41.25 miles to deliver food from Taco Bell. What is its average speed?
s = d/t
s = 41.25/.75
s = 55 mi/hr
What unit would you use to measure the mass of a bear?
What is a hypothesis
An educated guess
How close your measurement is to the true value is
Accuracy
How many significant figures are in 90.0760 ?
What is 6
s = d/t d = s x t t = d/s
John is driving 26.25 miles to the North Shore from Waipahu. He is driving 35 mph. How long will it take him to get to the North Shore?
t = d/s
t = 26.25/35
t = .75 hrs
What measurement equipment is this?
beaker
The variable(s) you keep the same in all the trials of the experiment?
What is the costant variable
Which student had the most precise data?
Student B
How many significant figures in 0.00470 ?
What is 3
s = d/t d = s x t t = d/s
Mary flew 8725 miles to Florida. Her flight was 5 hours. How fast was the plane travelling?
s = d/t
s = 8725/5
s = 1745 mi/hr
What is the measurement?
9 mL
The step in the scientific method is where you gather background information
What is Research
What is the precision in this target
High precision
How many significant figures in 507.09 x 10-5 ?
What is 5
s = d/t d = s x t t = d/s
Frank went skateboarding 7.25 miles in 15 min. What was his speed? (hint: change min. to hr.)
s = d/t
s =7.25/.25
s = 29 m/hr.
What is the measurement shown?
643.2 g
Mr. Tom researched how playing different types of music affected how many answers 8th grade students get on a math assignment. What is the independent variable?
Playing different types of music
Describe the accuracy on this target
Low accuracy
Using significant figure rule #5, complete the following:
60 min. = ____________
1 hour
s = d/t d = s x t t = d/s
A surfer travels at a constant speed of 105 m/min for 15 min. What distance did he travel?
d = s x t
d = 105 x 15
d = 1575 m
Convert 5742 g = ________ kg
5.742 kg
A study was done to determine the effect of eating different amounts of twinkies had on energy levels in 7th grade students. What is a constant variable in the experiment?
twinkies, 7th grade students
Which number is considered the most precise?
a) 9 mL
b) 9.764
c) 9.7
d) 9.76
b) 9.764