Unit 1= Ch 5 Measurement
-20⁰C = ____⁰F (Round to the nearest degree)
-4⁰F
57 mL = ______ L
0.057
How many significant digits area in the number 0.009?
1
Multiply the following three numbers and report your answer to the correct number of significant figures: 0.020 cm x 50 cm x 11.1 cm
1 x 10 cm³
water's density?
1.00g/mL
Kilo
10³m=1 km. Unit prefix meaning one thousand. Symbol = k
Mega
10⁶m=1 Mm. Unit prefix meaning one million. Symbol = M
Giga
10⁹m= 1Gm. Unit prefix meaning one billion. Symbol = G
64⁰F = ____⁰C (Round to the nearest degree)
18⁰C
1cm³ = ___ mL
1cm³ = 1mL
Centi
1m=10²cm. Unit prefix meaning one hundredth. Symbol = c
Milli
1m=10³mm. Unit prefix meaning one thousandth. Symbol = m
Micro
1m=10⁶µm. Unit prefix meaning one millionth. Symbol = µ
Nano
1m=10⁹nm. Unit prefix meaning one billionth. Symbol = n
Equivalence statement
2 statements with different units that are equal. Ex: 1 inch = 2.54 cm
2 cm = ______mm
20
3.5 g = ______mg
3,500
The speed of light in a vacuum is exactly 299,792,458 meters per second. Write this number in scientific notation with the coefficient rounded to the hundredths place.
3.00 × 10⁸
Write 3,465 in scientific notation.
3.465×10³
How many significant digits are in the number 0.000005721?
4
Write 45,870,320 in scientific notation.
4.587032 × 10⁷
Find the sum of 23.6 liters, 4.75 liters, 12.065 liters, and 9.11 liters using the correct precision.
49.5 L
Divide the following numbers and report your answer to the correct number of significant figures: 0.530 g / 0.1010 mL = ?
5.25 g/mL
67.2 m = ______ cm
6,720
7,939 mg = ______ g
7.939
Which symbol makes the following statement true? 7,500 ______ 7.5 × 10³
=
Which symbol makes the following statement true? 568 ______ 5.1 × 10²
>
Metric System
A measurement system based on the number 10 which uses prefix to make the unit larger or smaller than the base.
Units
A particular amount (g, L, km)
Dimensional Analysis
A problem solving method scientists use to convert units of measurement. Uses equivalence statements as ratios and cross out units.
Significant figures
All certain digit and one estimated digit.
Conversion Factor
An equivalence statement written as a ratio: 1inch/2.54cm or 2.54cm/inch
Density
D=M/V. The ratio between mass and volume.
Kelvin Scale
K = C + 273.15. A temperature scale with zero degrees K defined as absolute zero (no molecular movement)
Rounding off
Reducing the digits in a number while trying to keep its value similar.
SI Units
System of units of measurements that is widely used all over the world. There are seven base units: Mass, length, time, temperature, amount, current, luminosity.
Mass
The amount of matter in an object. SI unit = kg
Volume
The amount of space that a substance or object occupies. SI = m³
Scientific notation
Way of writing very small or very large numbers. Consists of a coefficient, base ten and an exponent. Ex: 2.5 x 10³