Day 10
How Much Sunshine?Investigation 3 part 1
Using a Bar Graph
Visualization Exercise 3.1
Lab Notebook, P. 7
9:59
11:02
12:12
13:26
14:23
14:4714:22
13:23
12:11
10:59
9:58
9:33
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average daylight for two years
Average daylight for three years
December 21
Shortest Day
Why would someone say that?• Do we have fewer than
24 hours?– Fewer hours of
sunshine– Light + dark hours = 24
Longest Day?
• If it’s true that there is a shortest day, is there also a longest day of the year?– Yes, June 21
Today’s Sunlight
How many hours of sunlight will we have today?Example: Sunrise 6:24 a.m. Sunset 6:44 p.m.
Calculate the amount of sunlight.
Sunrise/Sunset Time for 2000
• Table is the sunrise and sunset times
• Times were recorded on the 21st each month
Hours of Daylight
• Calculate the hours and minutes of daylight on the 21st of each month.
• Make a bar graph to show the amount of daylight month by month
Hours of Daylight
• Copy the hours of
daylight• Make a bar graph to
show the amount of daylight month by month
• Remember that 60 minutes = 1 hour
Jan 9:59
Feb 11:02
Mar 12:12
Apr 13:26
May 14:23
Jun 14:47
Jul 14:22
Aug 13:23
Sept 12:11
Oct 10:59
Nov 9:58
Dec 9:33
Review the Graph
0:00
2:24
4:48
7:12
9:36
12:00
14:24
16:48
Ho
urs
of
Day
lig
ht
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug Sep Oct
Nov
Dec
Month
Review the Graph
0:00
2:24
4:48
7:12
9:36
12:00
14:24
16:48
Ho
urs
of
Day
lig
ht
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug Sep Oct
Nov
Dec
Month
The amount of daylight over a year in Berkeley?
Review the Graph
0:00
2:24
4:48
7:12
9:36
12:00
14:24
16:48
Ho
urs
of
Day
lig
ht
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug Sep Oct
Nov
Dec
Month
Days get longer - Jan
to Jun
Days get shorter - Jun to
Dec
Review the Graph
0:00
2:24
4:48
7:12
9:36
12:00
14:24
16:48
Ho
urs
of
Day
lig
ht
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug Sep Oct
Nov
Dec
Month
Longest Day? Shortest Day?
Review the Graph
0:00
2:24
4:48
7:12
9:36
12:00
14:24
16:48
Ho
urs
of
Day
lig
ht
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug Sep Oct
Nov
Dec
Month
12 hours of daylight?
Review the Graph
0:00
2:24
4:48
7:12
9:36
12:00
14:24
16:48
Ho
urs
of
Day
lig
ht
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug Sep Oct
Nov
Dec
Month
How many hours of sunlight on the longest day?
More than 14 hours
Review the Graph
0:00
2:24
4:48
7:12
9:36
12:00
14:24
16:48
Ho
urs
of
Day
lig
ht
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug Sep Oct
Nov
Dec
Month
How many hours of sunlight on the shortest day?
More than 9 hours
• What season is the longest day?
Sunlight & Seasons
• What season is the shortest day?
Global Daylight
• When one location on Earth has 14 hours of daylight, is all the rest of the world having 14 hours of daylight as well?
• Is the longest day of the year the same length?
• Is the longest day of the year the same day?
Global Daylight
• Are the longest days always in the summer?
• Are the shortest days always in the winter?
Reading• Turn to pg 12
• Read “Wendy and Her
Worldwide Weather
Watchers”• Answer the Think Questions
on page 16