DO NOW: Match each prefix with its correct meaning. 1. deca a. 1/ 10 = 0.1 2. milli b. 1000 3. centi c. 100 4. deci d. 1/1000 = 0.001 5. hecto e. 10 6. kilo f. 1/100 = 0.01. Temperature. What is the temperature?.
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The temperature of an object describes
how hot or cold the object is relative to other
Scientists use two temperature scales to
* the Celsius scale (°C)
* the Kelvin scale (K)
The Celsius scale will be used in most of
your experiments. On the Celsius scale, the
freezing point of water is defined as 0°C
and the boiling point of water is defined as
A Kelvin is the SI base unit of temperature.
On the Kelvin scale, water freezes at about
273K and boils at about 373K.
To convert from K °C
* K – 273 = °C
To convert from °C K
* °C + 273 = K
Convert each temperature from °C to K.
°C + 273 = K
a. 54 °C = __________ K
b. 69 °C= __________ K
c. 15 °C= __________ K
Convert each temperature from K to °C.
K – 273 = °C
a. 32 K = __________ °C
b. 0 K = __________ °C
c. 281 K = __________ °C
Extremely small and extremely large
numbers can be compared more easily
when they are converted into a form called
The surface area of the Pacific Ocean (the
largest ocean) is 166,000,000,000,000 m2.
(That’s 166 trillion square meters.) This
quantity in scientific notation is expressed as
1.66 x 1014.
a. 50,000 m/s2 =
b. 0.00000000062 kg =
To add or subtract quantities written in
scientific notation, the quantities must have
the same exponent. If two quantities are
expressed by different powers of ten, you
must change one of the quantities so that
they are both expressed to the same power
of ten before you add you subtract.
a. 5.10 x 1020 + 4.11 x 1021
b. 6.2 x 108 - 3. 0 x 106
When multiplying or dividing quantities
written in scientific notation, the quantities
do not have to have the same exponent.
For multiplication, multiply the factors, then
add the exponents. For division, divide the
factors, then subtract the exponents.
a. (12 x104m)(4 x 10-2m)
d. (90 x 1014kg) / (9 x 1012kg)