Units and Measurements
This is the measurement system that we use in science and in most other countries
Metric or SI
Convert 1.83 x10^4 to standard notation
18300
How many spaces do I have to move a decimal going from base to Kilo on my king henry chart?
3
I am converting 12 cm to inches. Which part of my conversion factor goes in the denominator? (2.54 cm = 1 in)
2.54 cm
What does it mean to be accurate?
How close my measurement is to the correct value
Is gallon an Imperial or SI unit?
Imperial
Convert 6.72 x10^-7 to standard notation
.0000000672
Convert 32m to cm
3200cm
Convert 8 gallons to liters (1 gal = 3.78 liters)
30.24 L
What does it mean to be precise?
Measurement quantities are close together
This is the metric base unit for volume
Liter
Why do scientists use scientific notation?
To make really big or really small numbers easier to work with
Convert 25 hL to mm
2500000mm
Convert 3.1 miles to kilometers (1 mile = 1.6km)
5 kilometers
If I take measurements that are 400m, 420m, and 380m, are my measurements accurate and precise? (correct measurement is 400m)
Yes accurate, no precise
What are 2 reasons we use the metric system in science?
1. Easier to convert
2. Rest of the world uses it
Convert .0000842 to scientific notation
8.42 x 10^-5
Convert .12 km to dm
1200dm
Convert 12000 minutes into hours
200 hr
If I make measurements of an object and get 45g, 48g, and 47g, am I accurate and precise? (Correct measurement should have been 46g)
Yes accurate yes precise
Why does the U.S not switch over to the metric system? (Give 2 reasons)
1. We inherited it from the British
2. It is expensive to switch
3. It is hard to teach people a new system
Convert 912300002000 to scientific notation
9.12300002 x 10^11
Convert .002mm to km
.00000000022km
Convert 12 years to hours
105120 hours
To get proper measures of accuracy and preision, an instrument must be properly ___________ (starts with a c)
Calibrated