grade 5 maths decimals representation and operations

grade 5 maths decimals representation and operations

1. The Mystery of Time

4. Why do we track
time?

5. We owe the division of our
day into hours and minutes
predominantly to Ancient
Egyptians
They were the first to
develop devices of time
keeping
DID YOU KNOW?
0 1

6. •
What do we use to tell the time?
•
What other ways are there to find out about the time?
•
How many times a day do you look to find out the
time?
a. 0-5 b. 5-10 c. more than 10
•
Life without clocks would be beautiful/terrible. What
do you think?

7. What are they?
an obelisk a sundialan hourglass

8. Can you imagine our world
without a true
understanding of "time"?

9. A W O R L D W I T H O
U TT I M E K E E P I N G ? !
NO..
Calendars
Timepieces/Brands
Agendas/Schedules
Historical
Monuments Time
Zones Reminders
Meetings Alarms
0 6

10. C L O C K SA N DC A L E N D A R S
T H E NA N DN O W
S u n C l o c
k 1 4 0 0 B
. C
W a t e r
C l o c k
1 3 0 0
B . C
E l e c t r i
c C l o c k
1 8 9 5
A t o m i
c C l o
c k 1 9
4 9
M e c h a n i c
a l C l o c k
1 2 8 3
P e n d u l u
m C l o c k
1 6 5 6
0 7

11. C L O C K SA N DC A L E N D A R S
T H E NA N DN O W
L u n a r
C a l e n d
a r c . 3 0
0 0 B . C
C i v i l
C a l e n d a
r 2 5 0 0 B
. C
G r e g o r i
a n C a l e n
d a r 1 5 8 2
J u l i a n
C a l e n d
a r
4 5 B . C
0 8

12. If all of the world´s cultural heritage
was contained in a time capsule,
what would you include to
demonstrate the legacy of your
country?

13. •
True or False?
1. People first measured time by the
sun, moon and stars.
True or False
Answer: True

14. •
True or False?
2. People invented ways to tell the
time so they would know when to
meet.
True or False
Answer: True

15. •
True or False?
3. Water clocks depended on the sun.
True or False
Answer: False