Science 3rd, unit 12
Jun, 2104
Science 3rd grade
UNIT 12
By: J. Cesar Brazo Mur
El Tomillar, J.C. Brazo
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Science 3rd, unit 12
PAST
Jun, 2104
TIME PRESENT
FUTURE
measuring time The time
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The date
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Science 3rd, unit 12
Jun, 2104
CLOCK HOUR
Minutes
seconds
 g n i r u s a me ime t
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CALENDAR Month
YEAR
day
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Science 3rd, unit 12
Jun, 2104
HOUR
Examples: a) 2 hours x 60 = 120 min.
: 60
x 60
Minute
2 hours= 120 x 60 = 7,200 sec.
b) 10,800 sec : 60 = 180 min. 10,800 sec= 180 : 60 = 3 hours
: 60
x 60
secon d
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Science 3rd, unit 12
Jun, 2104
YEAR : 12
x 12
x 365
Month
: 365
: 30 / 31
x 30 / 31
day
El Tomillar, J.C. Brazo
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Science 3rd, unit 12
Jun, 2104
What is history? Prehistory
The period of time before the invention of writting - Paelolithic - Neolithic - Metals
INVENTION OF WRITTING
History
The period of time after the invention of writting - Ancient - Mediaeval - Modern
Historial sources: documents or objects that give us information about the past
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Science 3rd, unit 12
Jun, 2104
Historical sources Primary
written or created during the time we study. First evidences. - Diaries, newspapers...
Secondary based on
primary sources. - History textbooks - Articles - Biographies
- Buildings, clothes, coins... - Songs, poetry, novels...
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Science 3rd, unit 12
Jun, 2104
The history of transport PREHISTORY
wheel
boat
HISTORY
hot-air balloon
car
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steamboat
Nowadays
bicycle
aeroplane
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Science 3rd, unit 12
Jun, 2104
THE WHEEL evolution of the wheel
Probably, one of the MOST IMPORTANT inventions. It was discovered more than 5,000 years ago. We don't know exactly when or where
El Tomillar, J.C. Brazo
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Science 3rd, unit 12
Jun, 2104
THE BOAT Viking boat
XVIII C. boat
evolution of the boat
First used in Mesopotamia and Ancient Egypt.
Steam boat
Modern boat
They were made of wood and animal skins
El Tomillar, J.C. Brazo
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Science 3rd, unit 12
Jun, 2104
THE HOT-AIR BALLOON
Invented by the BROTHERS MONTGOLFIER. 1783, France. First made of paper and cloth. Air is heated by a fire below the balloon
El Tomillar, J.C. Brazo
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