Metric Basics
100 points each:
What are the 7 fundamental measurements?
(give types of measurements, not units of measurement)
Length, mass, time, temperature, amount, electric current, luminous intensity
Convert 999 mm to cm
99.9 cm
Write in scientific notation:
56,700,000,000
5.67 x 1010
ADD and round your answer to the correct decimal place:
11.7932 g + 4.6 g
16.4 g
What is the 2 letter abbreviation for the Metric system?
SI
Give 2 examples of derived measurements.
examples:
Area (m2), volume (m3), speed (m/s), density (g/cm3), many others
1 km = __ mm
1,000,000 mm
or
1 x 106 mm
Write in scientific notation:
0.000 000 000 000 047
4.7 x 10-14
DIVIDE and round your answer to the correct decimal place:
0.123 g / 0.055 mL = ?
2.2 g/mL
Science....
A) literally means "knowledge"
B) involves learning about our universe
C) is a systematic approach to problem solving
D) all of the above
D) all of the above
DAILY DOUBLE (300 points each):
What is the VOLUME of 50 grams of water
LABEL WITH CORRECT UNITS!
50 mL
50 cm3
500 g of water = __ L of water
0.5 L
(1 g = 1 mL = 1 cm3 of water)
DIVIDE:
9 x 108 / 3 x 103
3 x 105
How many significant figures in this measurement?
0.00040500
5
(none of the leading zeros...everything else is significant)
"Chemistry" is the study of __ and their __.
(the word "chemicals" is not acceptable for either)
substances/matter
changes
DAILY DOUBLE (200 points each):
What is the DENSITY of a rectangular solid with a mass of 250 g and sides measuring 4 cm, 7 cm, and 10 cm?
Will this solid object float in water?
D = 0.89 g/cm3
Yes!
Water's density is 1 g/cm3 or 1 g/mL
Convert 725 cubic meters (m3) to cubic centimeters (cm3).
725,000,000 cm3
or
7.25 x 108 cm3
ADD:
5 x 105 + 4 x 105
9 x 105
The deepest depth in the ocean is the Mariana trench off of the coast of Japan. It is 1,126,540.8 cm deep. How deep is this in MILES?
1 mile = 5,280 feet 1 inch = 2.54 cm
7 miles deep
The density of gold (Au) is 19.3 g/cm3. A sample of gold is measured 3 times. Here is the set of 3 measurements of the density:
14.2 g/cm3, 14.1 g/cm3, and 14.3 g/cm3.
This set of measurements would best be described as...A) accurate B) precise C) both D) neither
B) precise
The measurements are close to each other, but not very close to the density of gold
Give the steps of the scientific method in order
(different names can be acceptable)
1. Problem/question/observe
2. Hypothesis
3. Experiment/test
4. Data/prove/disprove/observation
5. Conclusion
Convert 55 miles per hour (m/hr) to meters per second (m/s) using the following conversions:
1 mile = 5,280 feet 1 meter = 3.281 feet
24.6 m/s
1 "google" = 1 x 10?
(or a 1 with how many zeros?)
100
What is the % error if you measured the density of an object as 5.3 g/mL, but its actual density was 4.7 g/mL?
12.8% error
Give 3 specific reasons WHY the Metric system of measurement is easier to use than the Imperial system.
1. all multiples of 10 / easier to convert
2. easier values to remember (ex: H2O freezes 0oC)
3. universal prefixes (ex: kilo always means 1,000)