1. MEASURING

2. SCIENTIFIC NOTATION 10
101
100
102
1000
103
10000
104
100000
105
106
0.1
10-1
0.01
10-2
0.001
10-3
0.0001
10-4
10-5

3. SCIENTIFIC NOTATION 358 · 105 35 800 000 35,8 · 106 3,58 · 107
2 546 · 106
25,46 · 108
2,546 · 109 0,
125 · 10-7
12,5 · 10-6
1,25 · 10-5
0,0531
531 · 10-4
53,1 · 10-3
5,31 · 10-2

4. SCIENTIFIC NOTATION
Pág.17
Ex.17
Write the following numbers in scientific notation:
0, g
0, g m
d) m e)
f) 0,

5. Values from Measurements
The complete measurement is called a physical quantity.
It consist of two parts: a number and a unit
For example meters = 100 m

6. MAGNITUDES DERIVED FUNDAMENTAL MAGNITUDES: MAGNITUDES:
They are measured directly
DERIVED
MAGNITUDES:
They are measured by a mathematics formula
length
time
density
surface
temperature
mass
volume

7. IS UNIT Physical Property Name of Unit Symbol Lenght meter m Mass
kilogram kg
Time
second s
Temperature
kelvin k
Pág. 16

8. IS UNIT
Length  meter, m: the distance that light travels in a vacuum in 1/299,792,458 of a second
Mass  kilogram, kg: the mass of a platinum-iridium alloy cylinder in a vault in France
Time  second, s: the duration of 9,192,631,770 periods of the radiation emitted in a specified transition between energy levels of cesium-133
Temperature  kelvin, K: 1/ of the temperature difference between absolute zero and the triple point temperature of water

9. IS UNIT
Pág.17
Ex.16
Expresses the following measures in fundamental SI units, using scientific notation:
76 km
3 g
5 dam
25 cm
32 mm
325 ms
82 g

10. Metric Prefixes G Giga 10⁹ Gm = Gigameter = 10⁹ meter M Mega 10⁶
ABBREVIATION
PREFIX
NUMBER
EXAMPLE G
Giga
10⁹
Gm = Gigameter = 10⁹ meter M
Mega
10⁶
Mw = Megawatt =10⁶ watt K
Kilo
10³
Kg = kilogram = 1000 gram c
centi
10ˉ²
cm = centimeter = 0.01 meter m
milli
10ˉ³
micro
10ˉ⁶ n
nano
10ˉ⁹ p
pico
10ˉ¹²

11. Which of these amounts is greater?
Pág.17
Ex.14
Which of these amounts is greater?
1 600 g or 1,5 kg?
1 450 mm or 1,3 m?
320 s or 5 min?

12. SI DERIVED UNIT DERIVED QUANTITY NAME Symbol Area Square meter m²
Volume
Cubic meter m³
Speed, velocity
Meter per second
m/s
Acceleration
Meter per second squared
m/s²
density
kilogram per cubic meter
Kg/m³
Pág. 16

13. Transform speeds in units indicated
Pág.17
Ex.15
Transform speeds in units indicated
In m/s:
72 km/h
100 km/h
120 km/h

14. Transform speeds in units indicated
Pág.17
Ex.15
Transform speeds in units indicated
b) In km/h:
12 m/s
340 m/s
0,36 m/s

15. OTHERS ENGLISH MEASURES

16. Length

17. Volume

18. Mass

19. Celsius and Fahrenheit Temperature

20. Comparing Temperature Scales

21. (T ºC x 1,8) + 32 = º F