TEMPERATURETILT

VEGETATION

DAY & NIGHT LENGTH

SUN’s INTENSITY

SUN’s PATH in SKY

EARTH ORBIT

Lab – Endicott Day/ Night Lengths (Equinox & Solstice)

Lab – Day Lengths Around the World (latitudes of Tropics, Polar Circles, & equator )

Lab – Solar Diameter (Distance) vs. Angle (altitude)

Lab – Elliptical Orbits (Distance from sun)

Lab – Solar Intensity (Angles & Temp)

Lab – Sun’s Path in the Sky

Vocabulary• Sunrise• Sunset• Duration of daylight• Duration of darkness• Equinox (March + Sept)• Solstice (June and Dec)• Seasons• Hemispheres• Latitude• Tropic Capricorn• Tropic Cancer• Arctic Circle• Antarctic Circle

ENDICOTT DAY and NIGHT

1. Circle the shortest day and night

2. Circle the longest day and night

Circle the two days when days and nights are closest to equal

DATE DAY NIGHT

10-Sep 12:44 11:16

23-Sep 12:08 11:52

30-Sep 11:48 12:12

10-Oct 11:20 12:40

20-Oct 10:53 13:07

30-Oct 10:27 13:33

10-Nov 10:00 14:00

20-Nov 9:39 14:21

30-Nov 9:22 14:38

10-Dec 9:11 14:49

22-Dec 9:06 14:54

30-Dec 9:09 14:51

10-Jan 9:20 14:40

20-Jan 9:35 14:25

30-Jan 9:56 14:04

10-Feb 10:23 13:37

20-Feb 10:49 13:11

Feb-29 11:14 12:46

DATE DAY NIGHT

10-Mar 11:42 12:18

20-Mar 12:10 11:50

30-Mar 12:39 11:21

10-Apr 13:09 10:51

20-Apr 13:37 10:23

30-Apr 14:02 9:58

10-May 14:26 9:34

20-May 14:46 9:14

30-May 14:50 9:10

10-Jun 15:12 8:48

20-Jun 15:16 8:44

30-Jun 15:12 8:48

10-Jul 15:03 8:57

20-Jul 14:48 9:12

30-Jul 14:29 9:31

10-Aug 14:04 9:56

20-Aug 13:38 10:22

30-Aug 13:12 10:48

What patterns do you find in the day and night length data for Endicott?

Patterns of Day and Night in Endicott (42oN latitude)

• Maximum day =

• Minimum night =

• Maximum night =

• Minimum day =

• Relationship between time of year and duration of

day and night =

• Relationship between duration of daylight and

darkness through the year =

Now that you know about Endicott’s days and nights throughout the year…

• Do all places on Earth have the same lengths of day and night?

• Do all places on Earth experience the same seasons at the same time?

• Next Lab will let us explore places around the world to find this answer.

Endicott is typical for a mid latitude city in North America.

Why do the lengths of the days and night change throughout the year?

Notebook SummaryLab - Day and Night in Endicott

• Draw something to help you remember what you did

• Summarize (bullets) the absolute necessities of what you should have learned from this lab activity

You understand both military and clock time formats

You can calculate differences in time

You can create complete graphs and check them for accuracy

You know how to evaluate direct, inverse, cycle, and independent relations between variables

You know the range in dates for the start of each season and whether it’s a solstice or an equinox

Relative length of the day and night for each equinox and solstice

What did you learn about day (and night) length at

different latitudes?

What did you find out about the relationship between day lengths and latitudes?

Range of Day Length is greatest near the Poles (0-24 hrs) at latitudes above the Polar circles

Range of Day Length is lowest near the equator (always close to 12 hrs)

Range of Day Length is greatest near the Poles (0-24 hrs) at latitudes above the Polar circles

The latitude of the Tropics and Polar Circles are related to the tilt of the Earth.

Tilt = 23.5o so the Tropics are 23.5o away from the equator and the Polar Circles are 23.5o away from the Poles!

Notebook SummaryDay Lengths Around the World

Everyplace on Earth has about 12 hours of day & night on the equinoxes.

Everyplace on Earth receives the same amount of daylight hours.

The closer to the Poles (higher latitudes), the more extreme the changes in day/night length. From 66-90o you have 0-24 hours of day or night on the solstices.

Close to the equator (lower latitudes), the range in day/nights lengths is very small and is close to 12

The opposite day/night lengths occur in the N & S hemispheres at the same time.

The opposite seasons occur in the N & S hemispheres at the same time.

What’s it all about?

SEASONS have different solar conditions!