1. How Much Sunshine? Investigation 3 part 1
Day 10
How Much Sunshine?
Investigation 3 part 1

2. Visualization Exercise 3.1
Using a Bar Graph
Visualization Exercise 3.1
>>>next slide<<<

3. Lab Notebook, P. 7 9:59 11:02 12:12 13:26 14:23 14:47 14:22 13:23
12:11
10:59
9:58
9:33
Exercise 3.1
Image comprehension focus: Applying data from a table to a bar graph
Rationale: Bar graphs are an effective and often-used method of comparing data in an organized, visual manner. It is important that students are able to apply data to a bar graph and to recognize the structure and function of bar graphs in order to effectively utilize the data content of the chart.
Type of Activity: Teacher Comment
Objective: To reinforce student understanding of conventions used in applying data to a graph.
Module Images: Lab Notebook, P. 7
Procedure: Explain: “At the top of page 7 in our lab notebooks we see a table of dates and times. We will use this table to calculate the hours of daylight for each month, then we will create a bar graph using the numbers from the table. This bar graph will allow us to quickly compare the number of hours of daylight by making the difference from month to month easy to see without reading.” Explain: “So, let’s first go through and calculate the number of hours of daylight.” (click to advance through: the calculations will appear line by line. Stop advancing slides when the last calculation is filled in) Explain: “OK, now that we’ve figured that out, what do we do with those numbers? Well, first we have to figure out where to graph the numbers. We can see that the y-axis (that’s the up-and-down line on the left) is already labeled with numbers 0 through 16. We can assume that these numbers correspond to the number of hours of daylight in the table above.” Ask: “How should we label the columns along the x-axis (that’s the side-to-side line at the bottom of the graph)? I’ll give you a hint: notice that there are 12 columns in this graph and there are 12 rows in the table above.” [the columns should be labeled January through December] (advance slide to reveal month labels) Explain: “Great, now let’s graph those numbers! We need to look at the January column:” (advance slide) Continue explanation: “from there we’ll fill in from the bottom line up to just below the ‘10’ line,” (advance slide) Continue explanation: “indicating that there were, on average, 9 hours and 59 minutes of sunlight for the month of January, Next, we do the same for February, noting that this time we should fill in from the bottom up to just above the ‘11’ line, indicating that there were, on average, 11 hours and 2 minutes of sunlight.” (advance slide twice) Continue explanation: “and we do the same for March…” (advance slide twice) Continue explanation: “…and for the rest of the months. Now that we have our graph completed, it is very easy to see that the number of hours of daylight increases from January to June and decreases from June to December. What might not be as obvious is that this is a cycle and these numbers stay more or less the same from year to year. Have a look at the following graph of two consecutive years” >>>next slide<<<
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

4. Average daylight for two years
Procedure (continued): Explain: “When we look at this image it is easy to see the pattern developing…” >>>next slide<<<

5. Average daylight for three years
Procedure (continued): Explain: “…and here it becomes even easier to see. This graph tells us that year after year, we can expect the average hours of daylight each month to be very similar to the years before and after” >>>end of exercise<<<

6. December 21 Do we have fewer than 24 hours?
Shortest Day
Why would someone say that?
Do we have fewer than 24 hours?
Fewer hours of sunshine
Light + dark hours = 24

7. Longest Day?
If it’s true that there is a shortest day, is there also a longest day of the year?
Yes, June 21

8. 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.

9. Sunrise/Sunset Time for 2000
Table is the sunrise and sunset times
Times were recorded on the 21st each month

10. 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

11. Hours of Daylight Copy the hours of daylight
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
Copy the hours of daylight
Make a bar graph to show the amount of daylight month by month
Remember that 60 minutes = 1 hour

12. Review the Graph

13. Review the Graph
The amount of daylight over a year in Berkeley?

14. Review the Graph Days get longer - Jan to Jun
Days get shorter - Jun to Dec

15. Review the Graph
Longest Day? Shortest Day?

16. Review the Graph
12 hours of daylight?

17. Review the Graph More than 14 hours
How many hours of sunlight on the longest day?
More than 14 hours

18. Review the Graph More than 9 hours
How many hours of sunlight on the shortest day?
More than 9 hours

19. Sunlight & Seasons What season is the longest day?
What season is the shortest day?

20. 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?

21. Global Daylight Are the longest days always in the summer?
Are the shortest days always in the winter?

22. Reading Turn to pg 12 Read “Wendy and Her Worldwide Weather Watchers”
Answer the Think Questions on page 16