Transcript Unit 1 Chemistry

Unit 1 Chemistry
Study guide: Measurement and
Estimation
*Click on each slide to see the answer
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Question 1A
• How many significant digits are there in
the number 123.45?
• 5
Question 1B
• How many significant digits are in the
number 0.00670?
• 3
Question 1C
• How many significant digits are there in
the number 100.0?
• 4
Question 2 A
• Convert the following number into
scientific notation: 3,450,700
• 3.45067 X 106
Question 2 B
• Convert the following number into
scientific notation: 0.00045
• 4.5 x 10 -4
Question 2C
• Convert the following number into
scientific notation: 1,000,000,000.00
• 1 x 10 9
Question 3 A
• Convert this number from scientific
notation into standard notation: 6.02 x 105
• 602,000
Question 3B
• Convert this number from scientific
notation into standard notation: 9.1 x 10 -3
• 0.0091
Question 3C
• Convert the following number from
scientific notation into standard notation:
5.40 x 10 9
• 5,400,000,000
Question 4A
• What metric unit would be most useful for
finding the volume of a swimming pool?
• Kiloliter
Question 4B
• What metric unit would be most useful for
finding the distance across a room?
• meter
Question 4C
• What metric unit would be most useful for
finding the mass of a paperclip?
• gram
Question 5A
• Convert the following: 50 m to Km
• 0.050 Km
Question 5B
• Convert the following: 0.0067 Kg to cg
• 670 cg
Question 5C
• Convert the following: 12 cm to mm
• 120 mm
Question 6A
• Convert the following: 1.3 x 10 -3 mL to L
• 1.3 x 10 -6 L
Question 6B
• Convert the following: 44 cm to m
• 0.44 m
Question 6C
• Convert the following: 7.4 Kg to g
• 7,400 g
Question 7A
• How many variables and controls should
you have in any given experiment?
• One variable we are testing, one that will
change because of the test and many
controls.
Question 7B
• If we were going to test how sunlight
affects the growth of a plant what might be
some controls that we would need to
have?
• Temperature, number of hours of
light/dark, amount of food and water, time
of day of watering, etc.
Question 7C
• One of the best ways to illustrate data is
with a graph, what is a best fit line?
• It is a line that shows the general trend of
your data, it gives us the average of the
values.
Question 8A
• Round the following to 3 significant
digits:30,450
• 30,400
Question 8B
• Round the following to 1 significant
digit:0.00010
• 0.0001
Question 8C
• Round the following to 4 significant digits:
1,200,569
• 1,201,000
Question 9A
• Which of the following values is the most
precise? 3.02; 3; 3.0
• 3.02
Question 9B
• Why is the hundredths place more precise
than the tenths?
• Because it is a smaller value which
indicates smaller (more precise) units on
your measuring tool.
Question 9C
• An object measures exactly 3.445 cm;
which of the following is the most
accurate? 3.460; 3.500; 3.437
• 3.437
Question 10A
• What are some tools that we might use to
measure volume in the laboratory?
• Beaker, graduated cylinders, Erlenmeyer
flasks, burette, etc.
Question 10B
• How are ml and cm3 related to each
other?
• 1 ml = 1 cm3
Question 10C
• What is 1000 cm3 equivalent to in liquid
volume?
• 1L
Question 11A
• What is the difference between mass and
weight?
• Mass does not change while weight is
dependant on the pull of gravity so can
change depending on your location.
Question 11B
• What types of tools do we use to measure
mass?
• Balances such as triple beam or double
pan.
Question 11C
• What is the standard unit of measurement
for mass?
• Kilogram
Question 12A
• This graph indicates what type of
relationship?
• Direct
Question 12B
• What type of relationship does this graph
indicate?
• Inverse
Question 12C
• What is the equation for an inverse
relationship?
• K = yx